ABOUT THIS GUIDE Thank you and congratulations on your purchase of the DES-1252 24- Port 10/100Mbps Fast Ethernet with 4-Port 10/100/1000Base-T and 2- Port Combo SFP Web-Smart Switch. This device integrates 1000Mbps Gigabit Ethernet, 100Mbps Fast Ethernet and 10Mbps Ethernet network capabilities in a highly flexible package.
INTRODUCTION This chapter will describe the features of the DES-1252 and provide some background information about Ethernet/Fast Ethernet/Gigabit Ethernet switching technology. Gigabit Ethernet Technology Gigabit Ethernet is an extension of IEEE 802.3 Ethernet utilizing the same packet structure, format, and support for CSMA/CD protocol,...
Ethernet or Fast Ethernet LAN segments. Switching is a cost-effective way of increasing the total network capacity available to users on a local area network. A switch increases capacity and decreases network loading by dividing a local area network into different segments, which won’t compete with each other...
♦ Supports Static MAC setting ♦ D-Link Safeguard Engine support ♦ Supports Simple Network Management Protocol(SNMP) ♦ MIB support for: RFC1213 MIB II, Private MIB ♦ Supports DHCP client ♦ Supports Port setting for Speed, Duplex Mode ♦ Easy configuration via Web Browser ...
SDRAM for CPU Flash Memory Port Functions Combo ports in the front panel 8M Bytes Prom 2M Bytes - 48 x 10/100BaseT ports Compliant with the following standards: 1. IEEE 802.3 compliance 2. IEEE 802.3u compliance 3. Support Full and Half Duplex operations - 2 Combo 1000Base-T/SFP ports -1000Base-T/SFP ports compliant to the following standards:...
1000Mbps Copper ports in the front panel Chassis Dimensions Reset button on the front panel Physical & Environment AC input Operation Temperature 1. DEM-330T (TX-1550/RX-1310nm), up to 10km, Single-Mode 2. DEM-330R (TX-1310/RX-1550nm), up to 10km, Single-Mode 3. DEM-331T (TX-1550/RX-1310nm), up to 40km, Single-Mode 4.
Storage Temperature -10~70°C Humidity Power consumption 26.6(watts) Heat Dissipation MTBF Emission (EMI) and Safety Certifications EMI-EMC Compliance: FCC class A, CE Class A, VCCI Class A Safety Compliance: cUL, UL Operation: 10%~90% RH Storage: 5%~90% RH 86.95(btu/hr) 298917 (hours)
Installation The site chosen for installation greatly affects the Web-Smart Switch’s performance. When installing, consider the following points: Install the Switch in a fairly cool and dry place. See Technical Specifications for the acceptable temperature and humidity operating ranges.
Install the Switch in a site free from strong electromagnetic field generators (such as motors), vibration, dust, and direct exposure to sunlight. Leave at least 10cm of space to the front and rear of the Switch for ventilation. Install the Switch on a sturdy, level surface that can support its weight, or in an EIA standard-size equipment rack.
Figure 3 – Mount the Switch in the rack or chassis Connecting Network Cable The DES-1252 has 48 ports that support 10/100Mbps Fast Ethernet; it also has 4 10/100/1000Base-T Ports and 2 Combo SFPs. Each port on the DES-1252 supports Auto-MDI/MDI-X. Auto- MDI/MDI-X is a feature that eliminates the need for worrying about using either a standard or crossover cable—you can use...
AC Power The DES-1252 can be used with AC power supply 100~240V AC, 50~60Hz. The power switch is located at the rear of the unit adjacent to the AC power connector and the system fan. The switch’s power supply will adjust to the local power source automatically and may be turned on without having any or all LAN segment cables connected.
Comprehensive LED indicators display the status of the switch and the network (see the Understanding LED Indicators section). 10/100 BASE-TX Twisted Pair Ports (Port 1~48) The DES-1252 is equipped with 48 Fast Ethernet twisted pair ports that are auto negotiable 10/100Mbps and also support auto...
10/100/1000 BASE-T / Mini GBIC Combo Ports (Option Port 49~50) The Switch is also equipped with two combo 10/100/1000 Base-T / Mini GBIC ports, which supports optional 100 or 1000BASE-SX/LX and 100Base-FX Mini GBIC module for fiber uplinks.
Figure 6 – LED indicators of the Switch Power and System LEDs Power LEDs When the Power LED light is on, the Switch is receiving power. When the Power LED light is off, the power cord is not improperly connected.
CPU LEDs ( Management Indicator) Blinking When the CPU is working, the CPU LED is blinking. The CPU is idle. Ports 1 ~ 48 Status LEDs Link/Act When the Link/Act LED light is on, the respective port is successfully connected to an Ethernet network. Blinking When the Link/Act LED is blinking, the port is transmitting or receiving data on the Ethernet network.
Link/Act for UTP ports When the Link/Act LED light is on, the respective port is connected to a 10/100 or 1000MBps Ethernet network. When the port speed is 1000Mbps, this LED will be shown in Green light. Otherwise, it will be shown in Amber light.
Blinking When the Link/Act LED is blinking, the respective port is transmitting or receiving data on the Ethernet network. No link.
CONFIGURATION Through a web browser, the features and functions of the DES-1252 Switch can be configured for optimum use. Supported web browsers The embedded Web-based Utility currently supports the following web browsers: • Microsoft Internet Explorer ver. 6.0, 5.5 •...
SmartConsole Utility Features The SmartConsole Utility is divided into four parts, a Menu Toolbar of functions at the top, Discovery List, Monitor List, and Device Setting. Menu Toolbar The Menu Toolbar in the SmartConsole Utility has four main tabs, File, View, Option, and Help. File includes: Monitor save, Monitor save as, Monitor load and Exit.
Group Interval establishes the intervals (in seconds) that the Web-Smart Switch will be discovered in the SmartConsole Utility Discovery List. NOTE: If the Group Interval is set to 0, IGMP snooping must be disabled or else the Web-Smart Switch will not be discovered.
Help includes: information About the SmartConsole Utility, such as the software version. Discovery List This is the list where all Web-Smart devices on the network are discovered. By pressing the Discovery button, all the Web-Smart devices are listed in the discovery list. Double click or press the Add to monitor list button to select a device from the Discovery List and add it to the Monitor List.
DHCP: uses a client/server model to obtain lease of an IP address from a DHCP server as part of the network boot process. Location: Shows the appointed description for the device location. Trap IP: Shows the IP where the Trap information will be sent. Subnet Mask: Shows the Subnet Mask set of the device.
The symbol “ ” represents a new trap signal, and will disappear after the event record is reviewed (clicked). Note: To receive Trap information, the switch must be configured with Trap IP and Trap Events, available from the Trap Setting menu.
Delete Item: Deletes the device from the Monitor List. Device Setting Function buttons of the Device Setting section provide several options. Configuration Setting: In the Configuration Setting, the following settings are available: Product Name, MAC Address, IP Address, Subnet Mask, Gateway, Set Trap to (Trapping IP Address), System name, Location, Password and DHCP ON/OFF (OFF is default).
Utility supports, see Supported web browsers on page 19. DHCP Refresh: select a device in the Monitor List and press the “DHCP Refresh”, and enter the password (if applicable) to trigger the Web-Smart Switch to request an IP address from a DHCP Server. Figure 13 – DHCP Refresh...
Web-based Management The DES-1252 Web-Smart Switch has a web browser GUI interface for configuring the Switch through a web browser. To see the list of web browsers the Web-based Utility supports, see Supported web browsers on page 19. A network administrator can manage, control and monitor the switch from the local LAN.
Once you have successfully logged in, the device status page will appear. In the top right corner the user name (default ‘admin’) is displayed with the IP address of the Switch. Below this is a Logout option for use when the session is complete.
Configuring Backup and Restoration, Firmware Backup and Upload, and System Reboot. Figure 17 – Tool Menu Reset: Provides a safe reset option for the Switch. All configurations will be reset to default. Figure 18 – Tool Menu > Reset Configure Backup and Restore: Allows the current configuration settings to be saved to a file (not including the password), and if necessary, to be restored from a backup.
Firmware Backup and Upload: Allows for the firmware to be saved, or for an existing firmware file to be uploaded to the Switch. Figure 20 – Tool Menu > Firmware Backup and Upload System Reboot: Provides a safe way to reboot the system. Ensure the configuration has been saved, or all the changes you just made may be lost after system reboot.
System > System Setting The System Setting includes IP Information and System information. There are two ways for the switch to attain IP: Static and DHCP When using static mode, the IP Address, Subnet Mask and Gateway can be manually configured. When using DHCP mode, the Switch...
System > Trap Setting By configuring the Trap Setting, it allows SmartConsole Utility to monitor specified events on this Web-Smart Switch. By default, Trap Setting is Disabled. When the Trap Setting is Enabled, enter the Destination IP address of the managing PC that will receive trap...
System Event: Monitors the system’s trapping information. Device Bootup: Traps system boot-up information. Illegal Login: Traps events of incorrect password logins, recording the IP of the originating PC. Fiber Port Events: Monitors the fiber port status. Link Up/Link Down: Traps fiber connection information. Twisted pair Port Events: Monitors the copper cable port status.
by clicking Apply. To refresh the information table to view the latest Link Status and Priority, press the Refresh button. Speed: Gigabit Fiber connections can operate in Forced Mode settings (1000M Full), Auto, or Disable. Copper connections can operate in Forced Mode settings (100M Full, 100M Half, 10M Full, 10M Half), Auto, or Disable.
Community Setting: In support of SNMP version 1, the Web-Smart Switch accomplishes user authentication by using Community Settings that function as passwords. The remote user SNMP application and the Switch SNMP must use the same community string. SNMP packets from a station that are not authenticated are ignored (dropped).
Trap Setting: Traps are messages that alert network personnel of events that occur on the Switch. Such events can be as serious as a reboot (someone accidentally turned the Switch OFF), or less serious Figure 26 – System > SNMP Setting...
The Switch can generate traps and send them to the trap recipient (i.e. network administrator). Setting up a Trap: Select Enable, enter a Trap Name (i.e. Trap Name must be selected from a Community Name), add the IP of the device to be monitored, and choose the event(s) to trap.
help to simplify network management by allowing users to move devices to a new VLAN without having to change any physical connections. The IEEE 802.1Q VLAN Configuration page provides powerful VID management functions. The original settings have the VID as 01, named “default”, and all 52 ports as “Untagged”...
Figure 301 – Configuration > 802.1Q VLAN > VID Assignments Configuration > Trunking The Trunking function enables the cascading of two or more ports for a combined larger bandwidth. Up to six Trunk groups may be created, each supporting up to 8 ports. Add a Trunking Name and select the ports to be trunked together, and click Apply to activate the selected Trunking groups.
Layer 2 MAC header. IGMP snooping can help reduce cluttered traffic on the LAN. With IGMP snooping enabled globally, the Web-Smart Switch will forward multicast traffic only to connections that have group members attached.
Query Interval (60-600 sec): The Query Interval is the interval between General Queries sent. By adjusting the Query Interval, the number of IGMP messages can increase or decrease; larger values cause IGMP Queries to be sent less often. Default is 125 seconds. Max Response Time (10-25 sec): The Max Response Time specifies the maximum allowed time before sending a responding report.
Router Timeout (60-600 sec): This is the interval after which a learnt router port entry will be purged. For each router port learnt, a 'RouterPortPurgeTimer' runs for 'RouterPortPurgeInterval'. This timer will be restarted whenever a router control message is received over that port.
Figure 334 – Configuration > IGMP Router port Settings To view the Multicast Entry Table for a given VLAN, press the View button. Figure 345 – Configuration > IGMP Multicast Entry Table Configuration > 802.1D Spanning Tree 802.1D Spanning Tree Protocol (STP) implementation is a backup link(s) between switches, bridges or routers designed to prevent...
Figure 356 – Configuration > Spanning Tree By default, Spanning Tree is Disabled. If Enabled, the Switch will listen for BPDU packets and its accompanying Hello packet. BPDU packets are sent even if a BPDU packet was not received. Therefore, each link between bridges is sensitive to the status of the link.
Root Bridge, the Switch will start sending its own BPDU to all other switches for permission to become the Root Bridge. If it turns out that the Switch has the lowest Bridge Identifier, it will become the Root Bridge. A time interval may be chosen between 6 and 40 seconds.
Port Mirroring is a method of monitoring network traffic that forwards a copy of each incoming and/or outgoing packet from one port of the Switch to another port where the packet can be studied. This enables network managers to better monitor network performances.
Figure 378 – QoS > 802.1p Default Priority Security > Safeguard Engine D-Link’s Safeguard Engine is a robust and innovative technology that automatically throttles the impact of packet flooding into the...
CPU. This function helps protect the Web-Smart Switch from being interrupted by malicious viruses or worm attacks. By default this is Enabled. Figure 39 – Security > Safeguard Engine Security > Broadcast Storm Control The Broadcast Storm Control feature provides the ability to control the receive rate of broadcasted packets.
Wi-Fi wireless networks. 802.1X holds a network port disconnected until authentication is completed. The switch uses Extensible Authentication Protocol over LANs (EAPOL) to exchange authentication protocol client identity (such as a user name) with the client, and forward it to another remote RADIUS authentication server to verify access rights.
Key: Masked password matching the Radius Server Key. Confirm Key: Enter the Key a second time for confirmation. TxPeriod: Sets the number of seconds that the switch waits for a response to an EAP-request/identity frame from the client before retransmitting the request. Default is 24 seconds.
This page provides two distinct features. The top table provides the ability to turn off auto learning Mac address if a port isn't connected to an uplink Switch (i.e. DHCP Server). By default, this feature is OFF (disabled). The Macs listed on this table may only connect from corresponding ports and VIDs, in order to protect the network from illegal Macs.
Security > Mac Address Table > Dynamic Forwarding Table For each port, this table displays the Mac address of each packet passing through the Switch. To add a Mac address to the Static Mac Address List, click the Add checkbox associated with the identified packet.
Figure 424 – Monitoring > Statistics Refresh: To renew the details collected and displayed. Clear Counter: To reset the details displayed. TxOK: Number of packets transmitted successfully. RxOK: Number of packets received successfully. TxError: Number of transmitted packets resulting in error. RxError: Number of received packets resulting in error.
Figure 435 – Monitoring > Port Statistics...