TP-Link JetStream T1500G-10MPS User Manual

TP-Link JetStream T1500G-10MPS User Manual

8-port gigabit smart switch
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User Guide

JetStream 8-Port Gigabit Smart Switch
T1500G-10MPS/T1500G-8T (TL-SG2008)
T1500G-10PS (TL-SG2210P)
REV1.0.2
1910012063

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Summary of Contents for TP-Link JetStream T1500G-10MPS

  • Page 1: User Guide

    User Guide JetStream 8-Port Gigabit Smart Switch T1500G-10MPS/T1500G-8T (TL-SG2008) T1500G-10PS (TL-SG2210P) REV1.0.2 1910012063...
  • Page 2: Fcc Statement

    Specifications are subject to change without notice. is a registered trademark of TP-Link Technologies Co., Ltd. Other brands and product names are trademarks or registered trademarks of their respective holders. No part of the specifications may be reproduced in any form or by any means or used to make any derivative such as translation, transformation, or adaptation without permission from TP-Link Technologies Co., Ltd.
  • Page 3: Industry Canada Statement

    この装置は、 クラスA情報技術装置です。 この装置を家庭環境で使用すると電波妨害を引き起こす ことがあります。この場合には使用者が適切な対策を講ずるよう要求されることがあります。 VCCI-A Industry Canada Statement CAN ICES-3 (A)/NMB-3(A) Safety Information When product has power button, the power button is one of the way to shut off the  product; When there is no power button, the only way to completely shut off power is to disconnect the product or the power adapter from the power source.
  • Page 4 Symbol Explanation RECYCLING This product bears the selective sorting symbol for Waste electrical and electronic equipment (WEEE). This means that this product must be handled pursuant to European directive 2012/19/EU in order to be recycled or dismantled to minimize its impact on the environment.
  • Page 5: Table Of Contents

    CONTENTS Package Contents ......................... 1 Chapter 1 About this Guide ......................2 Intended Readers ......................2 Conventions ......................... 2 Overview of This Guide ....................2 Chapter 2 Introduction ......................... 7 Overview of the Switch ....................7 Appearance Description ....................7 Front Panel ......................
  • Page 6 HTTP Config ....................28 4.4.2 HTTPS Config ....................29 4.4.3 SSH Config ...................... 33 4.4.4 Telnet Config ....................39 4.4.5 Chapter 5 Switching ........................40 Port ..........................40 Port Config ...................... 40 5.1.1 Port Mirror ....................... 41 5.1.2 Port Security ....................43 5.1.3 Port Isolation ....................
  • Page 7 Region Config ....................80 7.3.1 Instance Config ....................81 7.3.2 Instance Port Config ..................82 7.3.3 STP Security ......................83 Port Protect ..................... 83 7.4.1 Application Example for STP Function ..............86 Chapter 8 Multicast ........................91 IGMP Snooping ......................93 Snooping Config .....................
  • Page 8 PoE Config ..................... 129 10.1.1 PoE Profile ..................... 130 10.1.2 Time-Range ......................131 10.2 Time-Range Summary ................... 131 10.2.1 Time-Range Create ..................132 10.2.2 Holiday Config ....................134 10.2.3 Chapter 11 ACL .......................... 135 ACL Config ....................... 135 11.1 ACL Summary....................135 11.1.1 ACL Create ....................
  • Page 9 Option 82 Config ................... 158 12.2.3 ARP Inspection ......................159 12.3 ARP Detect ....................162 12.3.1 ARP Defend ....................164 12.3.2 ARP Statistics ....................165 12.3.3 DoS Defend ......................165 12.4 DoS Defend ....................167 12.4.1 802.1X ........................168 12.5 Global Config ....................
  • Page 10 Basic Config ......................207 14.1 Global Config ....................207 14.1.1 Port Config ....................208 14.1.2 Device Info ....................... 209 14.2 Local Info ....................... 209 14.2.1 Neighbor Info ....................211 14.2.2 Device Statistics ...................... 212 14.3 LLDP-MED ........................ 213 14.4 Global Config ....................214 14.4.1 Port Config ....................
  • Page 11: Package Contents

    Package Contents The following items should be found in your box: One Gigabit Smart Switch  One power cord  Four rubber cushions  Two mounting brackets and other fittings Installation Guide  Resource CD, including:  This User Guide •...
  • Page 12: Chapter 1 About This Guide

    Chapter 1 About this Guide This User Guide contains information for setup and management of T1500G-10MPS/ T1500G-8T/T1500G-10PS JetStream 8-Port Gigabit Smart Switch. Please read this guide carefully before operation. 1.1 Intended Readers This Guide is intended for network managers familiar with IT concepts and network terminologies.
  • Page 13 Chapter Introduction Chapter 2 Introduction Introduces the features, application and appearance of T1500G-10MPS/T1500G-8T/T1500G-10PS. Chapter 3 Login to the Introduces how to log on to the Web management page. Switch Chapter 4 System This module is used to configure system properties of the switch.
  • Page 14 Chapter Introduction Chapter 8 Multicast This module is used to configure multicast function of the switch. Here mainly introduces: IGMP Snooping: Configure global parameters of IGMP  Snooping function, port properties, VLAN and multicast VLAN. Multicast IP: Configure multicast IP table. ...
  • Page 15 Chapter Introduction Chapter 12 Network Security This module is used to configure the protection measures for the network security. Here mainly introduces: IP-MAC Binding: Bind the IP address, MAC address, VLAN  ID and the connected Port number of the Host together. DHCP Snooping: DHCP Snooping functions to monitor the ...
  • Page 16 Chapter Introduction Chapter 14 Maintenance This module is used to assemble the commonly used system tools to manage the switch. Here mainly introduces: System Monitor: Monitor the memory and CPU of the  switch. Log: View configuration parameters on the switch. ...
  • Page 17: Chapter 2 Introduction

    2.1 Overview of the Switch Designed for workgroups and departments, T1500G-10MPS/T1500G-8T/T1500G-10PS from TP-Link provides wire-speed performance and full set of layer 2 management features. It provides a variety of service features and multiple powerful functions with high security. The EIA-standardized framework and smart configuration capacity can provide flexible solutions for a variable scale of networks.
  • Page 18 Name Status Indication Flashing The switch is working normally. The switch is working abnormally. On/Off Green All the fans work properly. Yellow Not all the fans work properly. The remaining PoE power≤7W The remaining PoE power keeps ≤7W after this LED is PoE MAX Flashing on for 2 minutes.
  • Page 19 Name Status Indication The remaining PoE power≤7W The remaining PoE power keeps ≤7W after this LED is PoE MAX Flashing on for 2 minutes. The remaining PoE power>7W The port is supplying power normally. Green The supply power exceeds the corresponding port's Flashing maximum power.
  • Page 20 The following parts are located on the front panel of T1500G-8T:  LEDs Name Status Indication The switch is powered on. Power The switch is powered off or power supply is abnormal. Flashing Power supply is abnormal. Flashing The switch is working normally. System The switch is working abnormally.
  • Page 21: Rear Panel

    Name Status Indication A 1000Mbps device is connected to the corresponding port, but no activity. Green Flashing Data is being transmitted or received. Link/Act A 10/100Mbps device is connected to the corresponding port, but no activity. Yellow Flashing Data is being transmitted or received. No device is connected to the corresponding port.
  • Page 22  Kensington Security Slot Secure the lock (not provided) into the security slot to prevent the device from being stolen.  Power Socket Connect the female connector of the power cord here, and the male connector to the AC (Alternating Current) power outlet. Please make sure the voltage of the power supply meets the requirement of the input voltage.
  • Page 23 Figure 2-6 Rear Panel of T1500G-10PS  Power Socket Connect the power socket and AC (Alternating Current) power outlet with the provided DC power adapter and AC power cord. Please make sure the voltage of the power supply meets the requirement of the input voltage. ...
  • Page 24: Chapter 3 Login To The Switch

    Chapter 3 Login to the Switch 3.1 Login 1) To access the configuration utility, open a web-browser and type in the default address http://192.168.0.1 in the address field of the browser, then press the Enter key. Figure 3-1 Web-browser Tips: To log in to the switch, the IP address of your PC should be set in the same subnet addresses of the switch.
  • Page 25 Figure 3-3 Main Setup-Menu Note: Clicking Apply can only make the new configurations effective before the switch is rebooted. If you want to keep the configurations effective even the switch is rebooted, please click Save Config. You are suggested to click Save Config before cutting off the power or rebooting the switch to avoid losing the new configurations.
  • Page 26: Chapter 4 System

    Chapter 4 System The System module is mainly for system configuration of the switch, including four submenus: System Info, User Management, System Tools and Access Security. 4.1 System Info The System Info, mainly for basic properties configuration, can be implemented on System Summary, Device Description, System Time, Daylight Saving Time and System IP pages.
  • Page 27: Device Description

    When the cursor moves on the port, the detailed information of the port will be displayed. Figure 4-2 Port Information Port Info  Port: Displays the port number of the switch. Type: Displays the type of the port. Speed: Displays the maximum transmission rate of the port. Status: Displays the connection status of the port.
  • Page 28: System Time

    Choose the menu System→System Info→Device Description to load the following page. Figure 4-4 Device Description The following entries are displayed on this screen: Device Description  Device Name: Enter the name of the switch. Device Location: Enter the location of the switch. System Contact: Enter your contact information.
  • Page 29: Daylight Saving Time

    Time Config  Manual: When this option is selected, you can set the date and time manually. Get Time from NTP When this option is selected, you can configure the time zone Server: and the IP Address for the NTP Server. The switch will get UTC automatically if it has connected to an NTP Server.
  • Page 30: System Ip

    The following entries are displayed on this screen: DST Config  DST Status: Enable or disable the DST. Predefined Mode: Select a predefined DST configuration. USA: Second Sunday in March, 02:00 to First Sunday in  November, 02:00. Australia: First Sunday in October, 02:00 to First Sunday in ...
  • Page 31 Choose the menu System→System Info→System IP to load the following page. Figure 4-7 System IP The following entries are displayed on this screen: IP Config  MAC Address: Displays MAC Address of the switch. IP Address Mode: Select the mode to obtain IP Address for the switch. Static IP: When this option is selected, you should enter IP ...
  • Page 32: User Management

    If DHCP or BOOTP option is selected, the switch will get network parameters dynamically from the Internet, which means that IP address, subnet mask and default gateway cannot be configured. By default, the IP address is 192.168.0.1. 4.2 User Management User Management functions to configure the user name and password for users to log on to the Web management page with a certain access level so as to protect the settings of the switch from being randomly changed.
  • Page 33 Choose the menu System→User Management→User Config to load the following page. Figure 4-9 User Config The following entries are displayed on this screen: User Info  User Name: Create a name for users’ login. Access Level: Select the access level to login. Admin: Admin can edit, modify and view all the settings of ...
  • Page 34: System Tools

    4.3 System Tools The System Tools function, allowing you to manage the configuration file of the switch, can be implemented on Boot Config, Config Restore, Config Backup, Firmware Upgrade, System Reboot and System Reset pages. 4.3.1 Boot Config On this page you can configure the boot file of the switch. When the switch is powered on, it will start up with the startup image.
  • Page 35: Config Backup

    Choose the menu System→System Tools→Config Restore to load the following page. Figure 4-11 Config Restore The following entries are displayed on this screen: Config Restore  Restore Config: Click the Browse button to select a backup file and click the Import button to restore the startup configuration file.
  • Page 36: Firmware Upgrade

    4.3.4 Firmware Upgrade The switch system can be upgraded via the Web management page. To upgrade the system is to get more functions and better performance. Go to http://www.tp-link.com to download the updated firmware. Choose the menu System→System Tools→Firmware Upgrade to load the following page.
  • Page 37: System Reset

    Choose the menu System→System Tools→System Reboot to load the following page. Figure 4-14 System Reboot Note: To avoid damage, please don't turn off the device while rebooting. 4.3.6 System Reset On this page you can reset the switch to the default. All the settings will be cleared after the switch is reset.
  • Page 38: Http Config

    Choose the menu System→Access Security→Access Control to load the following page. Figure 4-16 Access Control The following entries are displayed on this screen: Access Control Config  Control Mode: Select the control mode for users to log on to the Web management page.
  • Page 39: Https Config

    Choose the menu System→Access Security→HTTP Config to load the following page. Figure 4-17 HTTP Config The following entries are displayed on this screen Global Config  HTTP: Select Enable/Disable the HTTP function on the switch. Session Config  Session Timeout: If you do nothing with the Web management page within the timeout time, the system will log out automatically.
  • Page 40 secure the data transmission between the Web browser and servers. It is mainly applied through ecommerce and online banking. SSL mainly provides the following services: Authenticate the users and the servers based on the certificates to ensure the data are transmitted to the correct users and servers;...
  • Page 41 Figure 4-18 HTTPS Config The following entries are displayed on this screen Global Config  HTTPS: Select Enable/Disable the HTTPS function on the switch. SSL Version 3: Enable or Disable Secure Sockets Layer Version 3.0. By default, it’s enabled. TLS Version 1: Enable or Disable Transport Layer Security Version 1.0.
  • Page 42 RSA_WITH_RC4_128_SHA: Key exchange with RC4 128-bit encryption and SHA for message digest. By default, it’s enabled. RSA_WITH_DES_CBC_SHA: Key exchange with DES-CBC for message encryption and SHA for message digest. By default, it’s enabled. RSA_WITH_3DES_EDE_CBC_SHA: Key exchange with 3DES and DES-EDE3-CBC for message encryption and SHA for message digest.
  • Page 43: Ssh Config

    4.4.4 SSH Config As stipulated by IETF (Internet Engineering Task Force), SSH (Secure Shell) is a security protocol established on application and transport layers. SSH-encrypted-connection is similar to a telnet connection, but essentially the old telnet remote management method is not safe, because the password and data transmitted with plain-text can be easily intercepted.
  • Page 44 Protocol V1: Select Enable/Disable SSH V1 to be the supported protocol. Protocol V2: Select Enable/Disable SSH V2 to be the supported protocol. Idle Timeout: Specify the idle timeout time. The system will automatically release the connection when the time is up. The default time is 120 seconds.
  • Page 45 Download: Click the Download button to download the desired key file to the switch. Note: It will take a long time to download the key file. Please wait without any operation. After the Key File is downloaded, the user's original key of the same type will be replaced. The wrong downloaded file will result in the SSH access to the switch via Password authentication.
  • Page 46 Application Example 2 for SSH: Network Requirements  1. Log on to the switch via key authentication using SSH and the SSH function is enabled on the switch. 2. PuTTY client software is recommended. Configuration Procedure  1. Select the key type and key length, and generate SSH key. Note: 1.
  • Page 47 2. After the key is successfully generated, please save the public key and private key to the computer. 3. On the Web management page of the switch, download the public key file saved in the computer to the switch. Note: 1.
  • Page 48 5. Click Browse to download the private key file to SSH client software and click Open. After successful authentication, please enter the login user name. If you log on to the switch without entering password, it indicates that the key has been successfully downloaded.
  • Page 49: Telnet Config

    4.4.5 Telnet Config On this page you can Enable/Disable Telnet function globally on the switch. Choose the menu System→Access Security→Telnet Config to load the following page. Figure 4-20 Telnet Config The following entries are displayed on this screen: Global Config ...
  • Page 50: Chapter 5 Switching

    Chapter 5 Switching Switching module is used to configure the basic functions of the switch, including five submenus: Port, LAG, Traffic Monitor, MAC Address and DHCP Filtering. 5.1 Port The Port function, allowing you to configure the basic features for the port, is implemented on the Port Config, Port Mirror, Port Security , Port Isolation and Loopback Detection pages.
  • Page 51: Port Mirror

    Port: Displays the port number. Type: Displays the medium type of the port. Description: Give a description to the port for identification. Status: Allows you to Enable/Disable the port. When Enable is selected, the port can forward the packets normally. Speed: Select the Speed mode for the port.
  • Page 52 Mirror Session List  Session: Displays the mirror session number. Destination: Displays the mirroring port. Mode: Displays the mirror mode. The value will be "Ingress Only", "Egress Only" or “Both”. Source: Displays the mirrored ports. Operation: You can configure the mirror session by clicking Edit, or clear the mirror session configuration by clicking the Clear.
  • Page 53: Port Security

    Source Port  Select: Select the desired port as a mirrored port. It is multi-optional. Port: Displays the port number. Ingress: Select Enable/Disable the Ingress feature. When the Ingress is enabled, the incoming packets received by the mirrored port will be copied to the mirroring port.
  • Page 54 Choose the menu Switching→Port→Port Security to load the following page. Figure 5-4 Port Security The following entries are displayed on this screen: Port Security  Select: Select the desired port for Port Security configuration. It is multi-optional. Port: Displays the port number. Max Learned MAC: Specify the maximum number of MAC addresses that can be learned on the port.
  • Page 55: Port Isolation

    exceeded. Forward: Packets arrived on the port with new MAC • addresses will be forwarded but the addresses will not be learned when the threshold limit is exceeded. Disable: The threshold is not valid. • Note: The Port Security function is disabled for the LAG port member. Only the port is removed from the LAG, will the Port Security function be available for the port.
  • Page 56: Loopback Detection

    Click Edit to display the following figure. Figure 5-6 Port Isolation Config 5.1.5 Loopback Detection With loopback detection feature enabled, the switch can detect loops using loopback detection packets. When a loop is detected, the switch will display an alert or further block the corresponding port according to the port configuration.
  • Page 57 The following entries are displayed on this screen Global Config  LoopbackDetection Here you can enable or disable Loopback Detection function Status: globally. Detection Interval: Set a Loopback Detection interval between 1 and 1000 seconds. By default, it’s 30 seconds. Automatic Time after which the blocked port would automatically recover Recovery Time:...
  • Page 58: Lag

    5.2 LAG LAG (Link Aggregation Group) is to combine a number of ports together to make a single high-bandwidth data path, so as to implement the traffic load sharing among the member ports in the group and to enhance the connection reliability. For the member ports in an aggregation group, their basic configuration must be the same.
  • Page 59 results in choosing a port to transfer the packets. • SRC MAC: When this option is selected, the Aggregate Arithmetic will apply to the source MAC addresses of the packets. • DST MAC: When this option is selected, the Aggregate Arithmetic will apply to the destination MAC addresses of the packets.
  • Page 60: Static Lag

    Figure 5-9 Detailed Information 5.2.2 Static LAG On this page, you can manually configure the LAG. Choose the menu Switching→LAG→Static LAG to load the following page. Figure 5-10 Manually Config The following entries are displayed on this screen: LAG Config ...
  • Page 61: Lacp Config

    Tips: The LAG can be deleted by clearing its all member ports. A port can only be added to a LAG. If a port is the member of a LAG, the port number will be displayed in gray and cannot be selected. 5.2.3 LACP Config LACP (Link Aggregation Control Protocol) is defined in IEEE802.3ad and enables the dynamic link aggregation and disaggregation by exchanging LACP packets with its partner.
  • Page 62: Traffic Monitor

    The following entries are displayed on this screen Global Config  System Priority: Specify the system priority for the switch. The system priority and MAC address constitute the system identification (ID). A lower system priority value indicates a higher system priority. When exchanging information between systems, the system with higher priority determines which link aggregation a link belongs to, and the system with lower priority adds the proper links to the link...
  • Page 63: Traffic Statistics

    Choose the menu Switching→Traffic Monitor→Traffic Summary to load the following page. Figure 5-12 Traffic Summary The following entries are displayed on this screen: Auto Refresh  Auto Refresh: Allows you to Enable/Disable refreshing the Traffic Summary automatically. Refresh Rate: Enter a value in seconds to specify the refresh interval. Traffic Summary ...
  • Page 64 Choose the menu Switching→Traffic Monitor→Traffic Statistics to load the following page. Figure 5-13 Traffic Statistics The following entries are displayed on this screen: Auto Refresh  Auto Refresh: Allows you to Enable/Disable refreshing the Traffic Summary automatically. Refresh Rate: Enter a value in seconds to specify the refresh interval. Port Select ...
  • Page 65: Mac Address

    Alignment Errors: For T1500G-10MPS: Displays the number of the received packets that have a bad Frame Check Sequence (FCS) with a non-integral octet (Alignment Error) and have a bad FCS with an integral octet (CRC Error). The length of the packet is between 64 bytes and 1518 bytes.
  • Page 66: Address Table

    The types and the features of the MAC Address Table are listed as the following: Being kept after Relationship between the reboot bound MAC address and Configuration Type Aging out the port (if the configuration is saved) Static Manually The bound MAC address cannot be learned by the Address configuring...
  • Page 67 Choose the menu Switching→MAC Address→Address Table to load the following page. Figure 5-14 Address Table The following entries are displayed on this screen: Search Option  MAC Address: Enter the MAC address of your desired entry. VLAN ID: Enter the VLAN ID of your desired entry. Type: Select the type of your desired entry.
  • Page 68: Static Address

    VLAN ID: Displays the corresponding VLAN ID of the MAC address. Port: Displays the corresponding Port number of the MAC address. Type: Displays the type of the MAC address. Aging Status: Displays the aging status of the MAC address. 5.4.2 Static Address The static address table maintains the static address entries which can be added or removed manually, independent of the aging time.
  • Page 69: Dynamic Address

    Search Option  Search Option: Select a Search Option from the pull-down list and click the Search button to find your desired entry in the Static Address Table. MAC: Enter the MAC address of your desired entry.  VLAN ID: Enter the VLAN ID number of your desired entry. ...
  • Page 70 Choose the menu Switching→MAC Address→Dynamic Address to load the following page. Figure 5-16 Dynamic Address The following entries are displayed on this screen: Aging Config  Auto Aging: Allows you to Enable/Disable the Auto Aging feature. Aging Time: Enter the Aging Time for the dynamic address. Search Option ...
  • Page 71: Filtering Address

    Aging Status: Displays the aging status of the MAC address. Bind: Click the Bind button to bind the MAC address of your selected entry to the corresponding port statically. Tips: Setting aging time properly helps implement effective MAC address aging. The aging time that is too long or too short results in a decrease of the switch performance.
  • Page 72 Filtering Address Table  Select: Select the entry to delete the corresponding filtering address. It is multi-optional. MAC Address: Displays the filtering MAC Address. VLAN ID: Displays the corresponding VLAN ID. Port: Here the symbol “--” indicates no specified port. Type: Displays the type of the MAC address.
  • Page 73: Chapter 6 Vlan

    Chapter 6 VLAN The traditional Ethernet is a data network communication technology based on CSMA/CD (Carrier Sense Multiple Access/Collision Detect) via shared communication medium. Through the traditional Ethernet, the overfull hosts in LAN will result in serious collision, flooding broadcasts, poor performance or even breakdown of the Internet. Though connecting the LANs through switches can avoid the serious collision, the flooding broadcasts cannot be prevented, which will occupy plenty of bandwidth resources, causing potential serious security problems.
  • Page 74: Q Vlan

    A VLAN can span across multiple switches, or even routers. This enables hosts in a VLAN to be dispersed in a looser way. That is, hosts in a VLAN can belong to different physical network segments. This switch supports 802.1Q VLAN to classify VLANs. VLAN tags in the packets are necessary for the switch to identify packets of different VLANs.
  • Page 75: Vlan Config

    (1) Untagged: The untagged port can be added in multiple VLANs. If a VLAN-tagged packet arrives at a port and the VLAN ID in its VLAN tag does not match any of the VLAN the ingress port belongs to, this packet will be dropped. The packets forwarded by the untagged port are untagged.
  • Page 76 Choose the menu VLAN→802.1Q VLAN→VLAN Config to load the following page. Figure 6-2 VLAN Table To ensure the normal communication of the factory switch, the default VLAN of all ports is set to VLAN1. The following entries are displayed on this screen: VLAN Table ...
  • Page 77: Port Config

    VLAN Info  VLAN ID: Displays the ID number of VLAN. Name: Displays the name of the specific VLAN. Untagged Port: Displays the untagged ports of the specific VLAN. Tagged Port: Displays the tagged ports of the specific VLAN. 6.1.2 Port Config Before creating the 802.1Q VLAN, please acquaint yourself with all the devices connected to the switch in order to configure the ports properly.
  • Page 78: Application Example For 802.1Q Vlan

    Click the Detail button to view the information of the corresponding VLAN. Figure 6-5 View the Current VLAN of Port The following entries are displayed on this screen: VLAN of Port  Displays the ID number of VLAN. VLAN ID: Displays the user-defined description of VLAN.
  • Page 79 Network Diagram  Configuration Procedure  Configure switch A  Step Operation Description Create VLAN10 Required. On VLAN→802.1Q VLAN→VLAN Config page, create a VLAN with its VLAN ID as 10, owning Untagged Port 2 and Tagged Port 3. Create VLAN20 Required.
  • Page 80: Chapter 7 Spanning Tree

    Chapter 7 Spanning Tree STP (Spanning Tree Protocol), subject to IEEE 802.1D standard, is to disbranch a ring network in the Data Link layer in a local network. Devices running STP discover loops in the network and block ports by exchanging information, in that way, a ring network can be disbranched to form a tree-topological ring-free network to prevent packets from being duplicated and forwarded endlessly in the network.
  • Page 81 Bridge: Switch A is the root bridge in the whole network; switch B is the designated bridge of  switch C. Port: Port 3 is the root port of switch B and port 5 is the root port of switch C; port 1 is the ...
  • Page 82 If the root bridge ID and the root path cost of X equal those of Y, but the bridge ID of X is smaller than that of Y, X is superior to Y. If the root bridge ID, the root path cost and bridge ID of X equal those of Y, but the port ID of X is smaller than that of Y, X is superior to Y.
  • Page 83 The switch compares the resulting BPDU with the BPDU of the desired port whose role you want to determine. If the resulting BPDU takes the precedence over the BPDU of the port, the  port is chosen as the designated port and the BPDU of this port is replaced with the resulting BPDU.
  • Page 84 MSTP Elements  MST Region (Multiple Spanning Tree Region): An MST Region comprises switches with the same region configuration and VLAN-to-Instances mapping relationship. IST (Internal Spanning Tree): An IST is a spanning tree in an MST. CST (Common Spanning Tree): A CST is the spanning tree in a switched network that connects all MST regions in the network.
  • Page 85: Stp Config

    Root Port: Indicates the port that has the lowest path cost from this bridge to the Root  Bridge and forwards packets to the root. Designated Port: Indicates the port that forwards packets to a downstream network  segment or switch. Master Port: Indicates the port that connects a MST region to the common root.
  • Page 86 Figure 7-4 STP Config The following entries are displayed on this screen: Global Config  STP: Select Enable/Disable STP function globally on the switch. Version: Select the desired STP version on the switch. STP: Spanning Tree Protocol.  RSTP: Rapid Spanning Tree Protocol. ...
  • Page 87: Stp Summary

    Note: The forward delay parameter and the network diameter are correlated. A too small forward delay parameter may result in temporary loops. A too large forward delay may cause a network unable to resume the normal state in time. The default value is recommended. An adequate hello time parameter can enable the switch to discover the link failures occurred in the network without occupying too much network resources.
  • Page 88: Port Config

    Figure 7-5 STP Summary 7.2 Port Config On this page you can configure the parameters of the ports for CIST Choose the menu Spanning Tree→Port Config to load the following page. Figure 7-6 Port Config The following entries are displayed on this screen: Port Config ...
  • Page 89 Select: Select the desired port for STP configuration. It is multi-optional. Port: Displays the port number of the switch. Status: Select Enable /Disable STP function for the desired port. Priority: Enter a value from 0 to 240 divisible by 16. Port priority is an important criterion on determining if the port connected to this port will be chosen as the root port.
  • Page 90: Mstp Instance

    Blocking: In this status the port can only receive BPDU  packets. Disconnected: In this status the port is not participating in the  STP. LAG: Displays the LAG number which the port belongs to. Note: Configure the ports connected directly to terminals as edge ports and enable the BPDU protection function as well.
  • Page 91: Instance Config

    7.3.2 Instance Config Instance Configuration, a property of MST region, is used to describe the VLAN to Instance mapping configuration. You can assign VLAN to different instances appropriate to your needs. Every instance is a VLAN group independent of other instances and CIST. Choose the menu Spanning Tree→MSTP Instance→Instance Config to load the following page.
  • Page 92: Instance Port Config

    Clear All: Click Clear All to clear up all VLAN IDs from the instance ID. The cleared VLAN ID will be automatically mapped to the CIST. 7.3.3 Instance Port Config A port can play different roles in different spanning tree instance. On this page you can configure the parameters of the ports in different instance IDs as well as view status of the ports in the specified instance.
  • Page 93: Stp Security

    Path Cost: Path Cost is used to choose the path and calculate the path costs of ports in an MST region. It is an important criterion on determining the root port. The lower value has the higher priority. Port Role: Displays the role of the port played in the MSTP Instance.
  • Page 94 Loop Protect  In a stable network, a switch maintains the states of ports by receiving and processing BPDU packets from the upstream switch. However, when link congestions or link failures occurred to the network, a down stream switch does not receive BPDU packets for certain period, which results in spanning trees being regenerated and roles of ports being reselected, and causes the blocked ports to transit to forwarding state.
  • Page 95 BPDU Filter  BPDU filter function is to prevent BPDUs flood in the STP network. If a switch receives malicious BPDUs, it forwards these BPDUs to the other switched in the network, which may result in spanning trees being continuously regenerated. In this case, the switch occupying too much CPU or the protocol status of BPDUs is wrong.
  • Page 96: Application Example For Stp Function

    BPDU Protect: BPDU Protect is to prevent the edge port from being attacked by maliciously created BPDUs BPDU Filter: BPDU Filter is to prevent BPDUs flood in the STP network. LAG: Displays the LAG number which the port belongs to. 7.5 Application Example for STP Function Network Requirements ...
  • Page 97 On Spanning Tree→STP Config→Port Config page, enable MSTP function for the port. Configure the region name and On Spanning Tree→MSTP Instance→Region Config the revision of MST region page, configure the region as TP-Link and keep the default revision setting. Configure VLAN-to-Instance Spanning Tree→MSTP...
  • Page 98 MSTP function for the port. Configure the region name and Spanning Tree→MSTP Instance→Region the revision of MST region Config page, configure the region as TP-Link and keep the default revision setting. Configure VLAN-to-Instance On Spanning Tree→MSTP Instance→Instance mapping table of the MST...
  • Page 99 Step Operation Description Configure VLAN-to-Instance On Spanning Tree→MSTP Instance→Instance mapping table of the MST Config page, configure VLAN-to-Instance mapping region table. Map VLAN101, 103 and 105 to Instance 1; map VLAN102, 104 and 106 to Instance 2. The configuration procedure for switch E and F is the same with that for switch D. ...
  • Page 100 Enable Loop Protect function for the non-edge ports.  Enable BPDU Protect function or BPDU Filter function for the edge ports which are connected to the PC and server. Return to CONTENTS...
  • Page 101: Chapter 8 Multicast

    Chapter 8 Multicast Multicast Overview  In the network, packets are sent in three modes: unicast, broadcast and multicast. In unicast, the source server sends separate copy information to each receiver. When a large number of users require this information, the server must send many pieces of information with the same content to the users.
  • Page 102 3. Each user can join and leave the multicast group at any time; 4. Real time is highly demanded and certain packets drop is allowed. IPv4 Multicast Address  1. IPv4 Multicast IP Address: As specified by IANA (Internet Assigned Numbers Authority), Class D IP addresses are used as destination addresses of multicast packets.
  • Page 103: Igmp Snooping

    Multicast Address Table  The switch is forwarding multicast packets based on the multicast address table. As the transmission of multicast packets cannot span the VLAN, the first part of the multicast address table is VLAN ID, based on which the received multicast packets are forwarded in the VLAN owning the receiving port.
  • Page 104 IGMP Messages  The switch, running IGMP Snooping, processes the IGMP messages of different types as follows. 1. IGMP Query Message IGMP query message, sent by the router, falls into two types, IGMP general query message and IGMP group-specific-query message. The router regularly sends IGMP general message to query if the multicast groups contain any member.
  • Page 105: Snooping Config

    Router Port: Indicates the switch port directly connected to the multicast router. Member Port: Indicates a switch port connected to a multicast group member. 2. Timers Router Port Time: Within the time, if the switch does not receive IGMP query message from the router port, it will consider this port is not a router port any more.
  • Page 106 The following entries are displayed on this screen: Global Config  IGMP Snooping: Select Enable/Disable IGMP Snooping function globally on the switch. Unknown Multicast: Select the operation for the switch to process unknown multicast, Forward or Discard. Report Message Enable or disable Report Message Suppression function Suppression: globally.
  • Page 107: Port Config

    8.1.2 Port Config On this page you can enable or disable the IGMP Snooping and Fast Leave feature for ports of the switch. Choose the menu Multicast →IGMP Snooping →Port Config to load the following page. Figure 8-5 Port Config The following entries are displayed on this screen: Port Config ...
  • Page 108: Vlan Config

    8.1.3 VLAN Config Multicast groups established by IGMP Snooping are based on VLANs. On this page you can configure different IGMP parameters for different VLANs. Choose the menu Multicast→IGMP Snooping→VLAN Config to load the following page. Figure 8-6 VLAN Config The following entries are displayed on this screen: VLAN Config ...
  • Page 109: Multicast Vlan

    Static Router Ports: Select one or more ports to be the static router ports in the VLAN. All multicast data in this VLAN will be forwarded through the static router ports. Forbidden Router Ports  UNIT:1/LAGS: Click 1 to configure the physical ports. Click LAGS to configure the link aggregation groups.
  • Page 110 the same multicast VLAN. This saves the bandwidth since multicast streams are transmitted only within the multicast VLAN and also guarantees security because the multicast VLAN is isolated from user VLANS. Before configuring a multicast VLAN, you should firstly configure a VLAN as multicast VLAN and add the corresponding ports to the VLAN on the 802.1Q VLAN page.
  • Page 111 Member Port Time: Specify the aging time of the member port. Within this time, if the switch doesn’t receive IGMP report message from the member port, it will consider this port is not a member port any more. Replace Source IP: Specify the IP address with which the switch will replace the source of IGMP packets.
  • Page 112 Network Requirements  Multicast source sends multicast streams via the router, and the streams are transmitted to user A and user B through the switch. Router: Its WAN port is connected to the multicast source; its LAN port is connected to the switch.
  • Page 113: Querier Config

    Configure ports On VLAN→802.1Q VLAN function pages. For port 3, configure its link type as Tagged, and add it to VLAN3, VLAN4 and VLAN5. For port 4, configure its link type as Untagged, and add it to VLAN3 and VLAN4. For port 5, configure its link type as Untagged, and add it to VLAN3 and VLAN5.
  • Page 114: Profile Config

    Query Interval: Enter the time interval of sending a general query frame by IGMP Snooping Querier. Max Response Enter the maximal time for the host to respond to a general Time: query frame sent by IGMP Snooping Querier. General Query Enter the source IP of the general query frame sent by IGMP Source IP: Snooping Querier.
  • Page 115 Profile ID: Specify the Profile ID you want to create, and it should be a number between 1 and 999. Mode: The attributes of the profile. Permit: Only permit the IP address within the IP range and  deny others. Deny: Only deny the IP address within the IP range and ...
  • Page 116: Profile Binding

    Profile ID: Displays the Profile ID you have created. Mode: The attributes of the profile. Permit: Only permit the IP address within the IP range and  deny others. Deny: Only deny the IP address within the IP range and ...
  • Page 117: Packet Statistics

    Profile and Max Group Binding  UNIT:1/LAGS: Click 1 to configure the physical ports. Click LAGS to configure the link aggregation groups. Select: Select the desired entry for configuration. Port: It is multi-optional. Displays the port number. Profile ID: The existing Profile ID bound to the selected port. Max Group: The maximum multicast group a port can join.
  • Page 118: Multicast Table

    Figure 8-11 Packet Statistics The following entries are displayed on this screen: Auto Refresh  Auto Refresh: Select Enable/Disable auto refresh feature. Refresh Period: Enter the time from 3 to 300 in seconds to specify the auto refresh period. IGMP Statistics ...
  • Page 119: Ipv4 Multicast Table

    The Multicast Table function is implemented on the IPv4 Multicast Table and Static IPv4 Multicast Table. 8.2.1 IPv4 Multicast Table On this page you can view the information of the multicast groups already on the switch. Multicast IP addresses range from 224.0.0.0 to 239.255.255.255. The range for receivers to join is from 224.0.1.0 to 239.255.255.255.
  • Page 120 Choose the menu Multicast→Multicast Table→Static IPv4 Multicast Table to load the following page. Figure 8-13 Static IPv4 Multicast Table The following entries are displayed on this screen: Create Static Multicast  Multicast IP: Enter the multicast IP address the desired entry must carry.
  • Page 121 VLAN ID: Displays the VLAN ID of the multicast group. Forward Port: Displays the forward port of the multicast group. Return to CONTENTS...
  • Page 122: Chapter 9 Qos

    Chapter 9 QoS QoS (Quality of Service) functions to provide different quality of service for various network applications and requirements and optimize the bandwidth resource distribution so as to provide a network service experience of a better quality.  This switch classifies the ingress packets, maps the packets to different priority queues and then forwards the packets according to specified scheduling algorithms to implement QoS function.
  • Page 123 2. 802.1P Priority Figure 9-2 802.1Q frame As shown in the figure above, each 802.1Q Tag has a Pri field, comprising 3 bits. The 3-bit priority field is 802.1p priority in the range of 0 to 7. 802.1P priority determines the priority of the packets based on the Pri value.
  • Page 124 a long time in congestion, the packets in the queues with lower priority will be “starved to death” because they are not served. Figure 9-4 SP-Mode WRR-Mode: Weight Round Robin Mode. In this mode, packets in all the queues are sent in order based on the weight value for each queue and every queue can be assured of a certain service time.
  • Page 125: Diffserv

    belong to the WRR group and the weight value ratio of TC0, TC1 and TC2 is 1:2:4. In this way, when scheduling queues, the switch allows TC3 to occupy the whole bandwidth following the SP mode and the TC0, TC1 and TC2 in the WRR group will take up the bandwidth according to their ratio 1:2:4.
  • Page 126: Schedule Mode

    The following entries are displayed on this screen: Port Priority Config  UNIT:1/LAGS: Click 1 to configure the physical ports. Click LAGS to configure the link aggregation groups. Select: Select the desired port to configure its priority. It is multi-optional. Port: Displays the physical port number of the switch.
  • Page 127: P Priority

    SP+WRR-Mode: Strict-Priority + Weight Round Robin Mode. In this mode, this switch provides two scheduling groups, SP group and WRR group. Queues in SP group and WRR group are scheduled strictly based on strict-priority mode while the queues inside WRR group follow the WRR mode.
  • Page 128: Dscp Priority

    Priority and CoS-mapping Config  Tag-id/Cos-id: Indicates the precedence level defined by IEEE802.1P and the CoS ID. Queue TC-id: Indicates the priority level of egress queue the packets with tag and CoS-id are mapped to. The priority levels of egress queue are labeled as TC0, TC1, TC2 and TC3.
  • Page 129: Bandwidth Control

    The following entries are displayed on this screen DSCP Priority Config  DSCP Priority: Select Enable or Disable DSCP Priority. Priority Level  DSCP: Indicates the priority determined by the DS region of IP datagram. It ranges from 0 to 63. Priority Level: Indicates the 802.1P priority the packets with tag are mapped to.
  • Page 130: Storm Control

    The following entries are displayed on this screen: Rate Limit Config  Click 1 to configure the physical ports. Click LAGS to UNIT:1/LAGS: configure the link aggregation groups. Select: Select the desired port for Rate configuration. It is multi-optional. Port: Displays the port number of the switch.
  • Page 131: Voice Vlan

    The following entries are displayed on this screen: Storm Control Config  Click 1 to configure the physical ports. Click LAGS to configure UNIT:1/LAGS: the link aggregation groups. Select: Select the desired port for Storm Control configuration. It is multi-optional. Port: Displays the port number of the switch.
  • Page 132 Voice VLANs are configured specially for voice data stream. By configuring Voice VLANs and adding the ports with voice devices attached to voice VLANs, you can perform QoS-related configuration for voice data, ensuring the transmission priority of voice data stream and voice quality.
  • Page 133 In practice, the port voice VLAN mode is configured according to the type of packets sent out from voice device and the link type of the port. The following table shows the detailed information. Voice Port Voice Stream Link type of the port and processing mode VLAN Mode Type Untagged: Not supported.
  • Page 134: Global Config

    Note: Don’t transmit voice stream together with other business packets in the voice VLAN except for some special requirements. The Voice VLAN function can be implemented on Global Config, Port Config and OUI Config pages. 9.3.1 Global Config On this page, you can configure the global parameters of the voice VLAN, including VLAN ID and aging time.
  • Page 135 Choose the menu QoS→Voice VLAN→Port Config to load the following page. Figure 9-13 Port Config Note: To enable voice VLAN function for the LAG member port, please ensure its member state accords with its port mode. If a port is a member port of voice VLAN, changing its port mode to be “Auto” will make the port leave the voice VLAN and will not join the voice VLAN automatically until it receives voice streams.
  • Page 136: Oui Config

    LAG: Displays the LAG number which the port belongs to. 9.3.3 OUI Config The switch supports OUI creation and adds the MAC address of the special voice device to the OUI table of the switch. The switch determines whether a received packet is a voice packet by checking its OUI address.
  • Page 137 Configuration Procedure of Voice VLAN: Step Operation Description Configure the link type of Required. On VLAN→802.1Q VLAN→VLAN Config the port page, configure the link type of ports of the voice device. Create VLAN Required. On VLAN→802.1Q VLAN→VLAN Config page, click the Create button to create a VLAN. Add OUI address Optional.
  • Page 138: Chapter 10 Poe

    Chapter 10 PoE Note: 1. Only T1500G-10MPS/T1500G10PS supports PoE function. 2. T1500G-10PS only support 802.3af standard, while T1500G-10MPS supports both IEEE 802.3af and IEEE802.3at standard. PoE (Power over Ethernet) technology describes a system to transmit electrical power along with data to remote devices over standard twisted-pair cable in an Ethernet network. It is especially useful for supplying power to IP telephones, wireless LAN access points, cameras and so on.
  • Page 139: Poe Config

    10.1 PoE Config All the RJ45 ports on the switch can be configured to supply power for the powered devices that comply with IEEE 802.3af and IEEE 802.3at. As the power every port or the system can provide is limited, some attributes should be set to make full use of the power and guarantee the adequate power to the linked PDs.
  • Page 140: Poe Profile

    PoE Status: Select to disable/enable the PoE feature for the corresponding port. If set enable, the corresponding port can supply power to the linked PD (Powered Device). PoE Priority: The priority levels include High, Middle and Low in descending order. When the supply power exceeds the system power limit, the PD linked to the port with lower priority will be disconnected.
  • Page 141: Time-Range

    Create PoE Profile  Profile Name: Enter the name of the profile. PoE Status: Select to the enable/disable PoE feature for the corresponding port. If set enable, the port may supply power to the linked PD (Power Device). PoE Priority: The priority levels include High, Middle and Low in descending order.
  • Page 142: Time-Range Create

    Figure 10-3 Time-Range Table The following items are displayed on this screen: Time-Range Table  Select: Select the desired entry to delete the corresponding time-range. Index: Displays the index of the time-range. Time-Range Name: Displays the name of the time-range. Mode: Displays the mode the time-range adopts.
  • Page 143 The following items are displayed on this screen: Time Range Config  Name: Enter the name of the time-range for time identification. Holiday: Select Holiday mode. By default, the mode is Include. Include: The Holiday has no effect on the Time-range, which means the final Time-range will be the intersection of the Absolute Time and Periodic Time.
  • Page 144: Holiday Config

    10.2.3 Holiday Config You can define holidays in this page. The holiday will be excluded from the Time-range you created if the Holiday mode is Exclude. Choose the menu PoE→Time-Range→Holiday Create to load the following page. Figure 10-5 Holiday Configuration The following entries are displayed on this screen: Create Holiday ...
  • Page 145: Chapter 11 Acl

    Chapter 11 ACL 11.1 ACL Config An ACL may contain a number of rules, and each rule specifies a different package range. Packets are matched in match order. Once a rule is matched, the switch processes the matched packets taking the operation specified in the rule without considering the other rules, which can enhance the performance of the switch.
  • Page 146: Mac Acl

    Choose the menu ACL→ACL Config→ACL Create to load the following page. Figure 11-2 ACL Create The following entries are displayed on this screen: Create ACL  ACL ID: Enter ACL ID of the ACL you want to create. Rule Order: User Config order is set to be match order in this ACL.
  • Page 147: Standard-Ip Acl

    D-MAC: Enter the destination MAC address contained in the rule. MASK: Enter MAC address mask. If it is set to 1, it must strictly match the address. 11.1.4 Standard-IP ACL Standard-IP ACLs analyze and process data packets based on a series of match conditions, which can be the source IP addresses and destination IP addresses carried in the packets.
  • Page 148: Policy Config

    Figure 11-5 Create Extend-IP Rule The following entries are displayed on this screen: Create Extend-IP ACL  ACL ID: Select the desired Extend-IP ACL for configuration. Rule ID: Enter the rule ID. Operation: Select the operation for the switch to process packets which match the rules.
  • Page 149: Policy Summary

    11.2.1 Policy Summary On this page, you can view the ACL and the corresponding operations in the policy. Choose the menu ACL→Policy Config→Policy Summary to load the following page. Figure 11-6 Policy Summary The following entries are displayed on this screen: Search Option ...
  • Page 150: Acl Binding

    Choose the menu ACL→Policy Config→Action Create to load the following page. Figure 11-8 Action Create The following entries are displayed on this screen: Create Action  Select Policy: Select the name of the policy. Select ACL: Select the ACL for configuration in the policy. 11.3 ACL Binding ACL Binding function can have the ACL take its effect on a specific port/VLAN.
  • Page 151: Port Binding

    The following entries are displayed on this screen: Search Option  Show Mode: Select a show mode appropriate to your needs. ACL VLAN-Bind Table  Select: Select the desired entry to delete the corresponding binding ACL. Index: Displays the index of the binding ACL. ACL ID: Displays the ID of the binding ACL.
  • Page 152: Vlan Binding

    The following entries are displayed on this screen: Port-Bind Config  ACL ID: Select the ID of the ACL you want to bind. Port: Select the number of the port you want to bind. Port-Bind Table  Index: Displays the index of the binding ACL. ACL ID: Displays the ID of the binding ACL.
  • Page 153: Policy Binding

    Step Operation Description Configure ACL rules Required. On ACL→ACL Config configuration pages, configure ACL rules to match packets. Bind Required. On ACL→ACL Binding configuration pages, port/VLAN bind the ACL to the port/VLAN to make the ACL effective on the corresponding port/VLAN. 11.4 Policy Binding Policy Binding function can have the policy take its effect on a specific port/VLAN.
  • Page 154: Port Binding

    Index: Displays the index of the binding policy. Policy Name: Displays the name of the binding policy. Interface: Displays the port number or VLAN ID bound to the policy. Direction: Displays the binding direction. Policy Port-Bind Table  Select: Select the desired entry to delete the corresponding binding policy.
  • Page 155: Vlan Binding

    Index: Displays the index of the binding policy. Policy Name: Displays the name of the binding policy. Port: Displays the number of the port bound to the corresponding policy. Direction: Displays the binding direction. 11.4.3 VLAN Binding On this page you can bind a policy to a VLAN. Choose the menu ACL→Policy Binding→VLAN Binding to load the following page.
  • Page 156: Application Example For Acl

    Bind the policy to the Required. On ACL→Policy Binding configuration pages, port/VLAN bind the policy to the port/VLAN to make the policy effective on the corresponding port/VLAN. 11.5 Application Example for ACL Network Requirements  1. The manager of the R&D department can access to the forum of the company and the Internet without any forbiddance.
  • Page 157 Step Operation Description Configure On ACL→ACL Config→ACL Create page, create ACL 500. requirement On ACL→ACL Config→Standard-IP ACL page, select ACL 500, and 4 create Rule 1, configure operation as Deny, configure S-IP as 10.10.70.0 and mask as 255.255.255.0, configure D-IP as 10.10.50.0 and mask as 255.255.255.0.
  • Page 158: Chapter 12 Network Security

    Chapter 12 Network Security Network Security module is to provide the multiple protection measures for the network security, including five submenus: IP-MAC Binding, DHCP Snooping, ARP Inspection, DoS Defend, 802.1X and AAA. Please configure the functions appropriate to your need. 12.1 IP-MAC Binding The IP-MAC Binding function allows you to bind the IP address, MAC address, VLAN ID and the connected Port number of the Host together.
  • Page 159 Choose the menu Network Security→IP-MAC Binding→Binding Table to load the following page. Figure 12-1 Binding Table The following entries are displayed on this screen: Search  Source: Displays the Source of the entry. All: All the bound entries will be displayed. •...
  • Page 160: Manual Binding

    other entries. Note: Among the entries with Critical collision level, the one with the highest Source priority will take effect. 12.1.2 Manual Binding You can manually bind the IP address, MAC address, VLAN ID and the Port number together in the condition that you have got the related information of the Hosts in the LAN.
  • Page 161: Arp Scanning

    IP Address: Displays the IP Address of the Host. MAC Address: Displays the MAC Address of the Host. VLAN ID: Displays the VLAN ID here. Port: Displays the number of port connected to the Host. Protect Type: Displays the Protect Type of the entry. Source: Displays the source of the entry.
  • Page 162 (2) Since the ARP request packet is broadcasted, all hosts in the LAN can receive it. However, only the Host B recognizes and responds to the request. Host B sends back an ARP reply packet to Host A, with its MAC address carried in the packet. (3) Upon receiving the ARP reply packet, Host A adds the IP address and the corresponding MAC address of Host B to its ARP Table for the further packets forwarding.
  • Page 163: Dhcp Snooping

    Source: Displays the source of the entry. Collision: Displays the Collision status of the entry. Warning: Indicates that the collision may be caused by • the MSTP function. Critical: Indicates that the entry has a collision with the • other entries. 12.2 DHCP Snooping Nowadays, the network is getting larger and more complicated.
  • Page 164 The most Clients obtain the IP addresses dynamically, which is illustrated in the following figure. Figure 12-6 Interaction between a DHCP client and a DHCP server DHCP-DISCOVER Stage: The Client broadcasts the DHCP-DISCOVER packet to find the DHCP Server. DHCP-OFFER Stage: Upon receiving the DHCP-DISCOVER packet, the DHCP Server selects an IP address from the IP pool according to the assigning priority of the IP addresses and replies to the Client with DHCP-OFFER packet carrying the IP address and other information.
  • Page 165 Administrator can be acquainted with the location of the DHCP Client via Option 82 so as to locate the DHCP Client for fulfilling the security control and account management of Client. The Server supported Option 82 also can set the distribution policy of IP addresses and the other parameters according to the Option 82, providing more flexible address distribution way.
  • Page 166: Global Config

    network from the DHCP Server Cheating Attack by discarding the DHCP response packets on the distrusted port, so as to enhance the network security. 12.2.1 Global Config Choose the menu Network Security→DHCP Snooping→Global Config to load the following page. Figure 12-8 DHCP Snooping The following entries are displayed on this screen: DHCP Snooping Configuration ...
  • Page 167: Port Config

    12.2.2 Port Config Choose the menu Network Security→DHCP Snooping→Port Config to load the following page. Figure 12-9 DHCP Snooping DHCP Snooping Port Configuration  UNIT:1/LAGS: Click 1 to configure the physical ports. Click LAGS to configure the link aggregation groups. Select: Select your...
  • Page 168: Option 82 Config

    LAG: Displays the LAG to which the port belongs. 12.2.3 Option 82 Config The switch can propagate the control information and the network parameters via the Option 82 field to provide more information for the Host. When the DHCP option 82 feature is enabled on the switch, a host is identified by the switch port through which it connects to the network (in addition to its MAC address).
  • Page 169: Arp Inspection

    Circuit ID Customization: Enable or disable the switch to define the Option 82 sub-option Circuit ID field. With Disable selected, configure VLAN ID and port number from which the packet is received as the circuit ID default value. Circuit ID: Enter the sub-option Circuit ID for the customized Option 82 field.
  • Page 170 As the above figure shown, the attacker sends the fake ARP packets with a forged Gateway address to the normal Host, and then the Host will automatically update the ARP table after receiving the ARP packets. When the Host tries to communicate with Gateway, the Host will encapsulate this false destination MAC address for packets, which results in a breakdown of the normal communication.
  • Page 171 Figure 12-13 ARP Attack – Cheating Terminal Hosts As the above figure shown, the attacker sends the fake ARP packets of Host A to Host B, and then Host B will automatically update its ARP table after receiving the ARP packets. When Host B tries to communicate with Host A, it will encapsulate this false destination MAC address for packets, which results in a breakdown of the normal communication.
  • Page 172: Arp Detect

    Host B: IP address is 192.168.0.102; MAC address is 00-00-00-22-22-22. Attacker: IP address is 192.168.0.103; MAC address is 00-00-00-33-33-33. 1. First, the attacker sends the false ARP response packets. 2. Upon receiving the ARP response packets, Host A and Host B updates the ARP table of their own.
  • Page 173 Choose the menu Network Security→ARP Inspection→ARP Detect to load the following page. Figure 12-15 ARP Detect The following entries are displayed on this screen: ARP Detect  ARP Detect: Enable/Disable the ARP Detect function, and click the Apply button to apply. Trusted Port ...
  • Page 174: Arp Defend

    Step Operation Description Enable ARP Detect feature. Required. Network Security→ARP Inspection→ARP Detect page, enable the ARP Detect feature. 12.3.2 ARP Defend With the ARP Defend enabled, the switch can terminate receiving the ARP packets for 300 seconds when the transmission speed of the legal ARP packet on the port exceeds the defined value so as to avoid ARP Attack flood.
  • Page 175: Arp Statistics

    12.3.3 ARP Statistics ARP Statistics feature displays the number of the illegal ARP packets received on each port, which facilitates you to locate the network malfunction and take the related protection measures. Choose the menu Network Security→ARP Inspection→ARP Statistics to load the following page.
  • Page 176 With DoS Defend function enabled, the switch can analyze the specific fields of the IP packets and distinguish the malicious DoS attack packets. Upon detecting the packets, the switch will discard the illegal packets directly and limit the transmission rate of the legal packets if the over legal packets may incur a breakdown of the network.
  • Page 177: Dos Defend

    DoS Attack Type Description packets to the TCP port139 (NetBIOS) of the Host with the Operation System bugs, which will cause the Host with a blue screen. Smurf Attack By pretending to be a Host, the attacker broadcasts request packets for ICMP response in the LAN.
  • Page 178 Authenticator System: The authenticator system is usually an 802.1X-supported network device, such as this TP-Link switch. It provides the physical or logical port for the supplicant system to access the LAN and authenticates the supplicant system. Authentication Server System: The authentication server system is an entity that provides authentication service to the authenticator system.
  • Page 179 802.1X client program to initiate an 802.1X authentication through the sending of an EAPOL-Start packet to the switch, This TP-Link switch can authenticate supplicant systems in EAP relay mode or EAP terminating mode. The following illustration of these two modes will take the 802.1X authentication procedure initiated by the supplicant system for example.
  • Page 180 Figure 12-20 EAP-MD5 Authentication Procedure (1) A supplicant system launches an 802.1X client program via its registered user name and password to initiate an access request through the sending of an EAPOL-Start packet to the switch. The 802.1X client program then forwards the packet to the switch to start the authentication process.
  • Page 181 (8) The supplicant system can also terminate the authenticated state by sending EAPOL-Logoff packets to the switch. The switch then changes the port state from accepted to rejected. EAP Terminating Mode In this mode, packet transmission is terminated at authenticator systems and the EAP packets are mapped into RADIUS packets.
  • Page 182: Global Config

    On this page, you can enable the 802.1X authentication function globally and control the authentication process by specifying the Authentication Method, Guest VLAN and various Timers. Please disable Handshake feature if you are using other client softwares instead of TP-Link 802.1X Client.
  • Page 183 Handshake: Enable/Disable the Handshake feature. The Handshake feature is used to detect the connection status between the TP-Link 802.1X Client and the switch. Please disable Handshake feature if you are using other client softwares instead of TP-Link 802.1X Client.
  • Page 184: Port Config

    Guest VLAN: Enable/Disable the Guest VLAN feature. Guest VLAN ID: Enter your desired VLAN ID to enable the Guest VLAN feature. The supplicants in the Guest VLAN can access the specified network source. Authentication Config  Quiet: Enable/Disable the Quiet timer. Quiet Period: Specify a value for Quiet Period.
  • Page 185 Description Required. For the client computers, you are required to Install 802.1X client install the TP-Link 802.1X Client provided on the CD. software. Please refer to the software guide in the same directory with the software for more information. Configure 802.1X...
  • Page 186: Aaa

    The 802.1X function should not be enabled for the port connected to the authentication server. 12.6 AAA Overview  AAA stands for authentication, authorization and accounting. This feature is used to authenticate users trying to log in to the switch or trying to access the administrative level privilege.
  • Page 187: Global Config

    The switch has two built-in authentication server group, one for RADIUS and the other for TACACS+. These server groups cannot deleted, user-defined RADIUS/TACACS+ server will join these two server groups automatically. 12.6.1 Global Config This page is used to enable/disable the AAA function globally. Choose the menu Network Security→AAA→Global Conifg to load the following page.
  • Page 188: Tacacs+ Server Config

    Choose the menu Network Security→AAA→RADIUS Conifg to load the following page. Figure 12-26 RADIUS Server Config Configuration Procedure  Configure the RADIUS server’s IP and other relevant parameters under the Server Config. View, edit and delete the configured RADIUS servers in the Server list. Entry Description ...
  • Page 189: Authentication Server Group Config

    Choose the menu Network Security→AAA→TACACS+ Conifg to load the following page. Figure 12-27 TACACS+ Server Config Configuration Procedure  Configure the TACACS+ server’s IP and other relevant parameters under the Server Config. View, edit and delete the configured TACACS+ servers in the Server list. Entry Description ...
  • Page 190 Choose the menu Network Security→AAA→Server Group to load the following page. Figure 12-28 Create New Server Group Figure 12-29 Add Server to Server Group Configuration Procedure  1) Configure the Server Group name and Server Type to create a server group. 2) Click edit in the Server Group List to configure the corresponding server group.
  • Page 191: Authentication Method List Config

    12.6.6 Authentication Method List Config Before you configure AAA authentication on a certain application, you should define an authentication method list first. An authentication method list describes the sequence and authentication method to be queried to authenticate a user. The switch uses the first method listed to authenticate users, if that method fails to respond, the switch selects the next authentication method in the method list.
  • Page 192: Application Authentication List Config

    View and delete the configured method priority list in the Authentication Login Method List and Authentication Enable Method List. . Entry Description  Method List Define a method list name. Name: List Type: Specify the authentication type as Login or Enable. Login stands for the Authentication Login Method List, and Enable stands for the Authentication Enable Method list.
  • Page 193: Authentication Server Config

    3) Configure the authentication method list from the Enable List drop-down menu. Thisoption defines the authentication method for users requiring the administrator privilege. Entry Description:  Module: Lists of the configurable applications on the switch. Login List: Configure an application for the login utilizing a previously configured method list.
  • Page 194 The Authentication Login Method List contains local by default, and the default login username and passwords are both admin. The Authentication Enable Method List is empty by default, which means users can prompt to administrator privilege without password. The application console/telnet/ssh/http use the default Login List and default Enable list by default.
  • Page 195: Chapter 13 Snmp

    Chapter 13 SNMP SNMP Overview  SNMP (Simple Network Management Protocol) has gained the most extensive application on the UDP/IP networks. SNMP provides a management frame to monitor and maintain the network devices. It is used for automatically managing the various network devices no matter the physical differences of the devices.
  • Page 196 SNMP Versions  This switch supports SNMP v3, and is compatible with SNMP v1 and SNMP v2c. The SNMP versions adopted by SNMP Management Station and SNMP Agent should be the same. Otherwise, SNMP Management Station and SNMP Agent cannot communicate with each other normally.
  • Page 197: Snmp Config

    SNMP Management Station by configuring its view type (included/excluded). The OID of managed object can be found on the SNMP client program running on the SNMP Management Station. 2. Create SNMP Group After creating the SNMP View, it’s required to create a SNMP Group. The Group Name, Security Model and Security Level compose the identifier of the SNMP Group.
  • Page 198: Snmp View

    Local Engine  Specify the switch’s Engine ID for the remote clients. The Local Engine ID: Engine ID is a unique alphanumeric string used to identify the SNMP engine on the switch. Remote Engine  Specify the Remote Engine ID for switch. The Engine ID is a Remote Engine ID: unique alphanumeric string used to identify the SNMP engine on the remote device which receives traps and informs from...
  • Page 199: Snmp Group

    View Type: Select the type for the view entry. Include: The view entry can be managed by the SNMP • management station. Exclude: The view entry cannot be managed by the • SNMP management station. View Table  Select: Select the desired entry to delete the corresponding view. All the entries of a View will be deleted together.
  • Page 200 Community Name is used for authentication. SNMP v2c can be configured on the SNMP Community page directly. v3: SNMPv3 is defined for the group. In this model, the USM • mechanism is used for authentication. If SNMPv3 is enabled, Security Level field enabled...
  • Page 201: Snmp User

    13.1.4 SNMP User The User in a SNMP Group can manage the switch via the management station software. The User and its Group have the same security level and access right. You can configure the SNMP User on this page. Choose the menu SNMP→SNMP Config→SNMP User to load the following page.
  • Page 202: Snmp Community

    None: No privacy method is used. • DES: DES encryption method is used. • Privacy Password: Enter the Privacy Password. User Table  Select: Select the desired entry to delete the corresponding User. It is multi-optional. User Name: Displays the name of the User. User Type: Displays the User Type.
  • Page 203 The following entries are displayed on this screen: Community Config  Community Name: Enter the Community Name here. Access: Defines the access rights of the community. read-only: Management right of the Community is • restricted to read-only, and changes cannot be made to the corresponding View.
  • Page 204 Step Operation Description Create SNMP User. Required. On the SNMP→SNMP Config→SNMP User page, create SNMP User in the Group and configure the auth/privacy mode and auth/privacy password for the User. If SNMPv1 or SNMPv2c is employed, please take the following steps: ...
  • Page 205: Notification

    13.2 Notification With the Notification function enabled, the switch can initiatively report to the management station about the important events that occur on the Views (e.g., the managed device is rebooted), which allows the management station to monitor and process the events in time. The notification information includes the following two types: Trap:Trap is the information that the managed device initiatively sends to the Network management station without request.
  • Page 206: Rmon

    Type: Select the type for the notifications. Trap: Indicates traps are sent. • Inform: Indicates informs are sent. The Inform type has a • higher security than the Trap type. Retry: Specify the amount of times the switch resends an inform request.
  • Page 207: Statistics

    monitor network at any time effectively. RMON is helpful for network administrator to manage the large-scale network since it reduces the communication traffic between management station and managed agent. RMON Group  This switch supports the following four RMON Groups defined on the RMON standard (RFC1757): History Group, Event Group, Statistic Group and Alarm Group.
  • Page 208: History

    Port: Enter or choose the Ethernet interface from which to collect the statistics. Owner: Enter the owner name. Status: Choose the status of statistics entry. valid: The entry exists and is valid. • underCreation: The entry exists, but is not valid. •...
  • Page 209: Event

    Index: Displays the index number of the entry. Port: Specify the port from which the history samples were taken. Interval: Specify the interval to take samplings from the port. Max Buckets: Displays the maximum number of buckets desired for the RMON history group of statistics, ranging from 1 to 130.
  • Page 210: Alarm

    Notify: Sending trap messages to the management • station. Log&Notify: Logging the event and sending trap • messages to the management station. Owner: Enter the name of the device or user that defined the entry. Status: Select Enable/Disable the corresponding event entry. 13.3.4 Alarm On this page, you can configure Statistic Group and Alarm Group for RMON.
  • Page 211 Threshold. Falling Threshold: Enter the falling counter value that triggers the Falling Threshold alarm. Falling Event: Select the index of the corresponding event which will be triggered if the sampled value is lower than the Falling Threshold. Alarm Type: Specify the type of the alarm. All: The alarm event will be triggered either the sampled •...
  • Page 212: Chapter 14 Lldp

    Chapter 14 LLDP LLDP (Link Layer Discovery Protocol) is a Layer 2 protocol that is used for network devices to advertise their own device information periodically to neighbors on the same IEEE 802 local area network. The advertised information, including details such as device identification, capabilities and configuration settings, is represented in TLV (Type/Length/Value) format according to the IEEE 802.1ab standard, and these TLVs are encapsulated in LLDPDU (Link Layer Discovery Protocol Data Unit).
  • Page 213 The transmission and the reception of LLDPDUs can be separately enabled for every port, making it possible to configure an implementation to restrict the port either to transmit only or receive only, or to allow the port to both transmit and receive LLDPDUs. Four LLDP admin statuses are supported by each port.
  • Page 214 The following table shows the details about the currently defined TLVs. TLV type TLV Name Description Usage in LLDPDU End of LLDPDU Mark the end of the TLV sequence in LLDPDUs. Mandatory Any information following an End Of LLDPDU TLV shall be ignored. Chassis ID Identifies Chassis...
  • Page 215 Different organizations have defined various TLVs. For instance, Port VLAN ID TLV, Port and Protocol VLAN ID TLV, VLAN Name TLV And Protocol Identity TLV are defined by IEEE 802.1, while MAC/PHY Configuration/Status TLV, Power Via MDI TLV, Link Aggregation TLV and Maximum Frame TLV are defined by IEEE 802.3.
  • Page 216 Note: For detailed introduction of TLV, please refer to IEEE 802.1AB standard and ANSI/TIA-1057. In TP-Link switch, the following LLDP optional TLVs are supported. Port Description TLV The Port Description TLV allows network management to advertise the IEEE 802 LAN station's port description.
  • Page 217: Basic Config

    Max Frame Size TLV The Maximum Frame Size TLV indicates the maximum frame size capability of the implemented MAC and PHY. Power Via MDI TLV The Power Via MDI TLV allows network management to advertise and discover the MDI power support capabilities of the sending IEEE 802.3 LAN station.
  • Page 218: Port Config

    Transmit Delay: Enter a value from 1 to 8192 in seconds to specify the time for the local device to transmit LLDPDU to its neighbors after changes occur so as to prevent LLDPDU being sent frequently. The default value is 2. Reinit Delay: This parameter indicates the amount of delay from when LLDP status becomes "disable"...
  • Page 219: Device Info

    The following entries are displayed on this screen: LLDP Port Config  Port Select: Select the desired port to configure. Admin Status: Select the port’s LLDP operating mode: Tx&Rx: send and receive LLDP frames. Rx_Only: Only receive LLDP frames. Tx_Only: Only send LLDP frames. Disable: neither send nor receive LLDP frames.
  • Page 220 Figure 14-3 LLDP Local Information The following entries are displayed on this screen Auto Refresh  Auto Refresh: Enable/Disable the auto refresh function. Refresh Rate: Specify the auto refresh rate. Local Info  Select the desired port number to display the information of the corresponding port. ...
  • Page 221: Neighbor Info

    TTL: Indicate the number of seconds that the recipient LLDP agent is to regard the information associated with this chassis ID and port ID identifier to be valid. Port Description: Display local port's description. System Name: Indicate local device's administratively assigned name. System Display local device's system description.
  • Page 222: Device Statistics

    Neighbor Info  Port Select: Select one port to display its neighbor information. System Name: Displays the system name of the neighbor device. Chassis ID: Displays the Chassis ID of the neighbor device. System Description: Displays the system description of the neighbor device. Neighbor Port: Displays the port number of the neighbor linking to local port.
  • Page 223: Lldp-Med

    Refresh Rate: Specify the auto refresh rate. Global Statistics  Last Update: Displays latest update time of the statistics. Total Inserts: Displays the number of neighbors inserted till last update time. Total Deletes: Displays the number of neighbors deleted by local device. Total Drops: Displays the number of neighbors dropped by local device.
  • Page 224: Global Config

    Communication Device Endpoint (Class III): The class of Endpoint Device that directly supports end users of the IP communication system. Network Policy TLV The Network Policy TLV allows both Network Connectivity Devices and Endpoints to advertise VLAN configuration and associated Layer 2 and Layer 3 attributes that apply for a set of specific applications on that port.
  • Page 225: Port Config

    The following entries are displayed on this screen LLDP-MED Parameters Config  Fast Start Count: When LLDP-MED fast start mechanism is activated, multiple LLDP-MED frames will be transmitted based on this parameter. Device Class: LLDP-MED devices are comprised of two primary device types: Network Connectivity Devices and Endpoint Devices.
  • Page 226: Local Info

    Included TLVs  Select TLVs to be included in outgoing LLDPDU. Location Identification Parameters  Configure the Location Identification TLV's content in outgoing LLDPDU of the port. Emergency Emergency number is Emergency Call Service ELIN identifier, Number: which is used during emergency call setup to a traditional CAMA or ISDN trunk-based PSAP.
  • Page 227: Neighbor Info

    Choose the menu LLDP→LLDP-MED→Local Info to load the following page. Figure 14-8 LLDP-MED Local Information The following entries are displayed on this screen Auto Refresh  Auto Refresh: Enable/Disable the auto refresh function. Refresh Rate: Specify the auto refresh rate. LLDP-MED Local Info ...
  • Page 228 Choose the menu LLDP→LLDP-MED→Neighbor Info to load the following page. Figure 14-9 LLDP-MED Neighbor Information The following entries are displayed on this screen Auto Refresh  Auto Refresh: Enable/Disable the auto refresh function. Refresh Rate: Specify the auto refresh rate. Neighbor Info ...
  • Page 229: Chapter 15 Maintenance

    Chapter 15 Maintenance Maintenance module, assembling the commonly used system tools to manage the switch, provides the convenient method to locate and solve the network problem. (1) System Monitor: Monitor the utilization status of the memory and the CPU of switch. (2)...
  • Page 230: Memory Monitor

    Figure 15-1 CPU Monitor Click the Monitor button to enable the switch to monitor and display its CPU utilization rate every four seconds. 15.1.2 Memory Monitor Choose the menu Maintenance→System Monitor→Memory Monitor to load the following page.
  • Page 231: Log

    Figure 15-2 Memory Monitor Click the Monitor button to enable the switch to monitor and display its Memory utilization rate every four seconds. 15.2 Log The Log system of switch can record, classify and manage the system information effectively, providing powerful support for network administrator to monitor network operation and diagnose malfunction.
  • Page 232: Log Table

    Table 15-1 Log Level The Log function is implemented on the Log Table, Local Log, Remote Log and Backup Log pages. 15.2.1 Log Table The switch supports logs output to two directions, namely, log buffer and log file. The information in log buffer will be lost after the switch is rebooted or powered off whereas the information in log file will be kept effective even the switch is rebooted or powered off.
  • Page 233: Local Log

    Note: The logs are classified into eight levels based on severity. The higher the information severity is, the lower the corresponding level is. This page displays logs in the log buffer, and at most 1024 logs are displayed. 15.2.2 Local Log Local Log is the log information saved in switch.
  • Page 234: Backup Log

    Choose the menu Maintenance→Log→Remote Log to load the following page. Figure 15-5 Log Host The following entries are displayed on this screen: Log Host  Index: Displays the index of the log host. The switch supports 4 log hosts. Host IP: Configure the IP for the log host.
  • Page 235: Device Diagnostics

    The following entry is displayed on this screen: Backup Log  Backup Log: Click the Backup Log button to save the log as a file to your computer. Note: It will take a few minutes to backup the log file. Please wait without any operation. 15.3 Device Diagnostics This switch provides Cable Test and Loopback functions for device diagnose.
  • Page 236: Network Diagnostics

    Length: If the connection status is normal, here displays the length range of the cable. Error: If the connection status is close, open or impedance, here displays the error length of the cable. Note: The Length displayed here is the length of pair cable not that of the physical cable. The test result is just for your reference.
  • Page 237: Tracert

    15.4.2 Tracert Tracert test function is used to test the connectivity of the gateways during its journey from the source to destination of the test data. When malfunctions occur to the network, you can locate trouble spot of the network with this tracert test. Choose the menu Maintenance→Network Diagnostics→Tracert to load the following page.
  • Page 238: Appendix A: Specifications

    Appendix A: Specifications T1500G-10MPS: IEEE802.3i, IEEE802.3u, IEEE802.3ab, IEEE802.3z, IEEE802.3ad, IEEE802.3af, IEEE802.3at, IEEE802.3x, IEEE802.1p, IEEE802.1q, IEEE802.1x, IEEE802.1d, IEEE802.1s, IEEE802.1w T1500G-8T: IEEE802.3i, IEEE802.3u,IEEE802.3ab, IEEE802.3ad, IEEE802.3af, Standards IEEE802.3x, IEEE802.1p, IEEE802.1q, IEEE802.1d, IEEE802.1x, IEEE802.1s, IEEE802.1w T1500G-10PS: IEEE802.3i, IEEE802.3u, IEEE802.3ab, IEEE802.3z, IEEE802.3ad, IEEE802.3af, IEEE802.3x, IEEE802.1p, IEEE802.1q, IEEE802.1x, IEEE802.1d, IEEE802.1s, IEEE802.1w Ethernet: 10Mbps HD,20Mbps FD Fast Ethernet: 100Mbps HD,200Mbps FD...
  • Page 239 1000Base-LX MMF or SMF SFP Module (T1500G-10MPS/ T1500G-10PS) 1000Base-LX10 SMF SFP Module (T1500G-10MPS/ T1500G-10PS) 1000Base-BX10 SMF SFP Module (T1500G-10MPS/ T1500G-10PS) T1500G-10MPS: PWR, SYS, PoE MAX, FAN, Speed or PoE, SFP1, SFP2, PoE, Speed T1500G-8T: Power, System, 1-8 T1500G-10PS: Power, System, PoE Max, SFP1, SFP2, Link/Act, PoE Status Transmission Method Store and Forward...
  • Page 240: Appendix B: Glossary

    Appendix B: Glossary Boot Protocol (BOOTP) BOOTP is used to provide bootup information for network devices, including IP address information, the address of the TFTP server that contains the devices system files, and the name of the boot file. Class of Service (CoS) CoS is supported by prioritizing packets based on the required level of service, and then placing them in the appropriate output queue.
  • Page 241 Internet Group Management Protocol (IGMP) A protocol through which hosts can register with their local router for multicast services. If there is more than one multicast switch/router on a given subnetwork, one of the devices is made the “querier” and assumes responsibility for keeping track of group membership. IGMP Snooping Listening to IGMP Query and IGMP Report packets transferred between IP Multicast routers and IP Multicast host groups to identify IP Multicast group members.
  • Page 242 Remote Authentication Dial-in User Service (RADIUS) RADIUS is a logon authentication protocol that uses software running on a central server to control access to RADIUS-compliant devices on the network. Remote Monitoring (RMON) RMON provides comprehensive network monitoring capabilities. It eliminates the polling required in standard SNMP, and can set alarms on a variety of traffic conditions, including specific error types.

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