3Com Baseline 2816 User Manual
3com baseline 2816: user guide
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Summary of Contents for 3Com Baseline 2816
- Page 1 Baseline Switch 2816-SFP/2824-SFP Plus User Guide 3C Number: 3C16485A/3C16487 www.3com.com Part No. DUA1648-5AAA03 Published August 2005...
- Page 2 3Com Corporation. 3Com Corporation reserves the right to revise this documentation and to make changes in content from time to time without obligation on the part of 3Com Corporation to provide notification of such revision or change.
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Page 3: Table Of Contents
ONTENTS BOUT UIDE Naming Convention Conventions Related Documentation Documentation Comments Product Registration NTRODUCING THE ASELINE Overview of the Baseline Switch Features and Capabilities Autosensing of MDI/MDIX Connections Autonegotiating 10/100/1000 Mbps Ports SFP Ports Physical Features Front Panel Rear Panel Package Contents NSTALLING THE WITCH Before You Begin... - Page 4 Modifying the IP Address Settings Automatic IP Configuration Setting the IP Address Configuring Port Settings Basic Port Configuration Advanced Port Configuration Configuring VLANs Creating a VLAN Sample VLAN Configurations Removing a VLAN Configuring Link Aggregation Guidelines for Creating Aggregated Links Defining the Members of an Aggregated Link Modifying Settings and Deleting an Aggregated Link...
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Page 5: About This Guide
Consequently, it assumes a basic working knowledge of local area networks (LANs). If a release note is shipped with this 3Com Baseline Switch 2816-SFP/2824-SFP Plus and contains information that differs from the information in this guide, follow the information in the release note. -
Page 6: Related Documentation
Contact your supplier for the latest product information and to order these prod- ucts. Product Registration You can now register your Baseline Switch on the 3Com Web site to receive up-to-date information on your product:... -
Page 7: Introducing The Baseline Switch
Switch package and helps you get to know the physical features of the device. Overview of the Baseline Switch The 3Com Baseline Switch 2816-SFP/2824-SFP Plus is a versatile, easy-to-use configurable Switch. It is ideal for users who want the high-speed performance of... -
Page 8: Physical Features
1: I HAPTER NTRODUCING THE ASELINE any combination. This offers you the flexibility of using SFP transceivers to provide connectivity between the Switch and a 1000 Mbps core network. When an SFP port is in operation, the corresponding 10/100/1000BASE-T port is disabled. Physical Features Figure 1 shows the front and rear panels of the Switch. - Page 9 In such a configuration, you may notice some degradation of network performance. 3Com recommends that you use devices that are capable of auto-negotiation (and that you ensure that auto-negotiation is enabled, if it is a configurable option).
- Page 10 1: I HAPTER NTRODUCING THE ASELINE Table 1 10BASE-T/100BASE-TX Ports Flashing Port disabled or link loopback error. Yellow to Green The link has not been established, either nothing is connected to the port, or there is a problem: Check that the attached device is powered on. ■...
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Page 11: Rear Panel
Switch to the factory default settings if, for example, you have forgotten the default IP address, or forgotten your user name or password. CAUTION: 3Com recommends that you back up your configuration settings before you recover the Switch, otherwise your configuration will be lost. Refer to “Configuration”... - Page 12 1: I HAPTER NTRODUCING THE ASELINE WITCH...
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Page 13: Installing The Switch
NSTALLING THE This chapter contains information that you need to install and set up the Switch. It covers the following topics: Before You Begin ■ Positioning the Switch ■ Rack-Mounting or Free-Standing ■ Supplying Power to the Switch ■ Connecting a Network Device ■... -
Page 14: Rack-Mounting Or Free-Standing
■ Air flow around the unit and through the vents in ■ the side of the case is not restricted (3Com recommends that you provide a minimum of 25 mm (1 in.) clearance). The air is as free of dust as possible. -
Page 15: Montagesatz Anweisungen
Insert the two screws supplied in the mounting kit, and the fully tighten with a suitable screwdriver. Figure 2 Inserting the Screws Repeat the two previous steps for the other side of the unit. Insert the unit into the 19-inch rack and secure with suitable screws (not provided). -
Page 16: Supplying Power To The Switch
2: I HAPTER NSTALLING THE WITCH Apply the pads to the underside of each Switch, sticking one in the marked area at each corner. Place the Switch units on top of each other, ensuring that the pads of the upper unit line up with the recesses of the lower unit. -
Page 17: Connecting A Network Device
You will need to reconfigure the Switch after you reset it. If these do not resolve the issue: Check the 3Com Knowledgebase for a solution. To ■ visit the 3Com Knowledgebase Web site, start your Web browser, and then enter http://knowledgebase.3com.com... -
Page 18: Using Sfp Transceivers
3CSFP92 SFP (LX) ■ To access the latest list of approved SFP transceivers for the Switch on the 3Com Corporation World Wide Web site, enter this URL into your Internet browser: www.3com.com 3Com recommends using 3Com SFPs on the Switch. If you insert an SFP transceiver that is not supported, the Switch will not recognize it. -
Page 19: Removing An Sfp Transceiver
At frequent intervals, you should visually check the Switch. Regular checks can give you an early warning of a possible failure; any problems can then be attended to when there will be least effect on users. 3Com recommends periodically checking the items listed in Table 6. - Page 20 2: I HAPTER NSTALLING THE WITCH Table 6 Items to Check Item Verify That Cabling All external cabling connections are secure and that no cables are pulled taut Cooling Fan Where possible, check that the cooling fan is operating by listening to the unit. The fan is fit- ted on the right side of the unit (when viewed from the front).
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Page 21: Connecting To The Web Interface
A computer that is connected to the Switch and that ■ has a Web browser Running the Discovery Application The 3Com Baseline Switch 2816-SFP/2824-SFP Plus CD-ROM contains, among others, the Discovery application. To use Discovery to connect to the Web interface, do... -
Page 22: Logging On To The Web Interface
Switch, and then click Next. If the computer has only one adapter, click Next. Discovery searches the network for 3Com devices. When detection is complete, the Discovered Devices screen displays detected network devices. -
Page 23: Navigating Around The Web Interface
The logon page also displays the IP address that the Switch is currently using. Figure 7 Logon Page To log on to the Web interface: In Username, type admin Leave the Password field blank. Click OK. Navigating Around the Web Interface The Web interface has been designed to enable you to easily perform advanced configuration tasks and view information about the Switch. -
Page 24: Buttons
Buttons Device Mimic Menu Item Description Support Displays 3Com contact information and describes how to use the online help sys- Log Out Allows you to securely log off the Web interface Depending on the page that is currently displayed, the following buttons may appear: Apply –... -
Page 25: Accessing The Interface Without Using Discovery
Enable or disable flow control ■ Configure the speed duplex settings ■ Set traffic priority for the port ■ Accessing the Interface Without Using Discovery The Discovery application works by automatically detecting the IP address that is assigned to the Switch, and then using that address to connect to the Web interface. - Page 26 3: C HAPTER ONNECTING TO THE NTERFACE...
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Page 27: Configuring The Switch
ONFIGURING THE This chapter provides information on how to configure the Switch’s features. Topics include: Configuration Overview ■ Viewing Switch Information ■ Changing the Admin Password ■ Modifying the IP Address Settings ■ Configuring Port Settings ■ Configuring VLANs ■ Configuring Link Aggregation ■... -
Page 28: Changing The Admin Password
Management Software Information – Shows the ■ versions of the loader (firmware), boot ROM, and code. If you request for technical assistance from 3Com Support, you may be asked to print out the information on this page. Changing the Admin Password To prevent unauthorized users from accessing the Web interface and modifying the Switch’s settings, the... -
Page 29: Modifying The Ip Address Settings
Figure 10 Password Page To set the admin password: On the menu, click Password. The Change Administration Password page appears. In Old Password, type your current password. By default, the Switch does not have any password. If this is your first time to access this page or if you have not previously set a password, leave this field blank. -
Page 30: Setting The Ip Address
The IP address would therefore become The Switch repeats step 2 until an unused IP address is found. 3Com recommends using automatic IP configuration only for the initial setup. Once you gain access to the console, you should assign an IP address to the Switch... -
Page 31: Configuring Port Settings
Table 8 IP Setting Options Option Description Management VLAN Indicates the VLAN from which the Web interface can be accessed. By default, all ports belong to VLAN 1. If you create other VLANs, you will only be able to access that Web interface from a com- puter that belongs to VLAN 1. - Page 32 4: C HAPTER ONFIGURING THE WITCH Label – Optional name for the port to help you ■ identify the device connected to it. For example, if an access point is connected to this port, you can label it as Access Point. Status –...
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Page 33: Advanced Port Configuration
always negotiate to half-duplex, resulting in a duplex mismatch. This can result in a significant reduction in network performance. If you are unsure of how to configure the speed/duplex setting, simply enable autonegotiation for the port. You cannot modify the speed/duplex settings of ports that are members of a trunk or aggregated link. -
Page 34: Creating A Vlan
4: C HAPTER ONFIGURING THE WITCH VLAN serves as a logical workgroup with no physical barriers, and allows users to share information and resources as though located on the same LAN. You can use the Switch to create VLANs to organize any group of ports into separate broadcast domains. -
Page 35: Sample Vlan Configurations
happens, you will need to reset the Switch to factory settings. To create a VLAN: On the menu, click VLANs. The VLANs page appears. In VLAN ID, click Create New VLAN. In VLAN ID (1-4094), type an unused ID number for the VLAN that you are creating. - Page 36 4: C HAPTER ONFIGURING THE WITCH Figure 16 Desktop VLAN Configuration Endstations Endstations in VLAN 2 in VLAN 1 Baseline Switch 2824-SFP Plus Server Server in VLAN 1 in VLAN 2 If you want to add ports 7, 8, and 16 to VLAN2 (as shown in Figure 16), so that the ports on the default VLAN1 and the ports on VLAN2 cannot communicate with each other, do the following:...
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Page 37: Removing A Vlan
Figure 17 Uplink VLAN Configuration Endstation in VLAN 1 (Desktop) Endstation in VLAN 2 (Desktop) Switch 1 Port 16 in VLANs 1 and 2 (Uplink) Switch 2 Port 8 in VLANs 1 and 2 (Uplink) Endstation in VLAN 2 (Desktop) Endstation in VLAN 1 (Desktop) To set up the configuration shown in Figure 17, do the... -
Page 38: Guidelines For Creating Aggregated Links
4: C HAPTER ONFIGURING THE WITCH Trunking permits the connection of multiple ports to the same remote device in order to achieve higher network throughput. For link aggregation to work, the trunks must be configured on both ends (switches). The Switch does not support the Link Aggregation Control Protocol (LACP), which is specified in IEEE 802.3ad. -
Page 39: Modifying Settings And Deleting An Aggregated Link
Modifying Settings and Deleting an Aggregated Link Use the Modify/Delete tab to modify the trunk name and configure flow control and duplex settings of the aggregated link. To modify trunk settings: On the Modify/Delete tab, modify any of the following settings: Name —... -
Page 40: Viewing Statistics
4: C HAPTER ONFIGURING THE WITCH Figure 20 Summary Tab Viewing Statistics The Statistics page shows a summary of traffic statistics for all ports, as shown in Figure 21. Figure 21 Statistics Page Figures that appear onscreen indicate the number of packets transmitted (Tx) and received (Rx). -
Page 41: Mirroring Port Traffic
Figure 22 Port Statistics Page Figures on the Statistics page for individual ports are not updated in real time. To view the latest statistics for the port, click Refresh. Mirroring Port Traffic The Switch allows you to monitor traffic going in and out of a particular port. -
Page 42: Running Cable Diagnostic
4: C HAPTER ONFIGURING THE WITCH Analyzer Port — This is the port to which the ■ analyzer is attached. Click Apply. For information on how to interpret the output on the port analyzer, refer to its accompanying documentation. Running Cable Diagnostic The Switch provides cable diagnostic, which helps you detect and resolve issues with the attached cables. -
Page 43: Configuration
Figure 25 Restart Tab Any network users who are currently accessing the Internet will have their access interrupted while the restart takes place, and they may need to reboot their computers when the restart has completed and the Switch is operational again. Configuration Use the Configuration tab to reset the Switch to factory defaults and to back up or restore configuration... -
Page 44: Backing Up And Restoring Configuration
Upgrade The Upgrade facility allows you to install on the Switch any new releases of system software that 3Com may make available. The newer version of software can be downloaded via HTTP and once copied to the Switch; the Switch will restart and apply the newer system software version. -
Page 45: Spanning Tree
lost while the new software is being copied to the Switch). The upgrade procedure can take a few minutes, and is complete when the Power LED has stopped flashing and is permanently green. Make sure that you do not inter- rupt power to the Switch during the upgrade proce- dure;... -
Page 46: 802.1P Prioritization
4: C HAPTER ONFIGURING THE WITCH Figure 28 Spanning Tree Tab Forward — Spanning tree BPDU packets received on ■ a port are forwarded to all other ports. Block and Discard — Spanning tree BPDUs received ■ on a port are dropped. The Switch does not forward BPDUs to other ports. -
Page 47: Viewing Support Information
Standard (spare) Excellent Effort (business critical) Controlled Load (streaming multimedia) Video (Interactive media), less than 100 milli- seconds latency and jitter. Voice (Interactive voice), less than 10 millisec- onds latency and jitter. Network Control Reserved traffic The traffic prioritization feature supported by the Switch is compatible with the relevant sections of the IEEE 802.1D standard (incorporating IEEE 802.1p). - Page 48 4: C HAPTER ONFIGURING THE WITCH Figure 30 Support Page...
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Page 49: Troubleshooting
Switch, with suggested courses of corrective action to take. If you encounter an issue that is not listed here and you cannot solve it, check the 3Com Knowledgebase at http://knowledgebase.3com.com your local technical support representative. - Page 50 The fiber cable is in good condition. ■ The SFP module is correctly inserted. ■ A 3Com SFP module is being used. Refer to ■ “Approved SFP Transceivers” on page 18 for details. The equipment at the far end is installed and ■...
- Page 51 If the firmware image becomes corrupted, you need to upgrade the firmware. The Switch goes into Fail Safe mode, and the page shown in Figure 31 displays. Figure 31 Fail Safe Mode Page To upgrade the firmware, click Browse, and follow the on-screen instructions to upgrade the Switch to the required version of firmware.
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Page 52: If The Problem Persists
5: T HAPTER ROUBLESHOOTING Click on the RESTART THE SWITCH button. Restore the configuration file that you backed up in step 1. Refer to “Configuration” on page 43 for details. If the Problem Persists If the problem persists and the unit still does not operate successfully, contact your supplier with the following information before returning the unit: Product number and serial number (printed on a... -
Page 53: Upport For
Contact your authorized 3Com reseller or 3Com for a complete list of the value-added services available in your area. Troubleshoot Online You will find support tools posted on the 3Com Web site at 3Com Knowledgebase helps you troubleshoot 3Com products. This query-based interactive tool is located at http://knowledgebase.3com.com... -
Page 54: Appendix A: Obtaining Support For Yourp
Details about recent configuration changes, if ■ applicable To send a product directly to 3Com for repair, you must first obtain a return authorization number (RMA). Products sent to 3Com, without authorization numbers clearly marked on the outside of the package, will be returned to the sender unopened, at the sender’s... - Page 55 Thailand 001 800 611 2000 You can also obtain support in this region using the following e-mail: apr_technical_support@3com.com Or request a repair authorization number (RMA) by fax using this number: +65 543 6348 Europe, Middle East, and Africa Telephone Technical Sup-...
- Page 56 A: O PPENDIX BTAINING UPPORT FOR Country Telephone Number Antigua 1 800 988 2112 Argentina 0 810 444 3COM Aruba 1 800 998 2112 Bahamas 1 800 998 2112 Barbados 1 800 998 2112 Belize 52 5 201 0010 Bermuda...
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Page 57: Echnical Nformation
ECHNICAL Related Standards The 3Com Baseline Switch 2816/2824-SFP Plus has been designed to the following standards: Functional ISO 8802-3, IEEE 802.3 (Ethernet), IEEE 802.3u (Fast Ethernet), IEEE 802.3ab and IEEE 802.3z (Gigabit Ethernet), IEEE 802.3x (Flow Control), IEEE 802.1D 1998 (Bridging) -
Page 58: Appendix B: Technical Information
B: T PPENDIX ECHNICAL NFORMATION... -
Page 59: Afety Nformation
AFETY Important Safety Information Please read the following safety information carefully before installing the Baseline Switch 2816-SFP/2824-SFP Plus. WARNING: Installation and removal of the unit must be carried out by qualified personnel only. If installing the Switch unit in a stack with other ■... -
Page 60: Appendix C: Safety Information
C: S PPENDIX AFETY NFORMATION Power Cord Set This must be approved for the country where it will be used. U.S.A. and The cord set must be UL-approved and CSA ■ Canada certified. The minimum specifications for the flexible ■ cord are: No. -
Page 61: Wichtige Sicherheitinformationen
WARNUNG: Die Installation und der Ausbau des Geräts darf nur durch Fachpersonal erfolgen. Wenn der Baseline Switch 2816-SFP Plus mit anderen ■ 3Com Hubs oder Switche gestapelt werden soll, müssen grössere Geräte unter den schmaleren Hubs eingebaut werden. Das Gerät sollte nicht an eine ungeerdete ■... - Page 62 C: S PPENDIX AFETY NFORMATION angeschlossenen Geräte unter SELV-Bedingungen betrieben werden. Stromkabel. Dies muss von dem Land, in dem es benutzt wird geprüft werden: Schweiz Dieser Stromstecker muß die SEV/ASE ■ 1011Bestimmungen einhalten. Europe Das Netzkabel muß vom Typ HO3VVF3GO.75 ■...
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Page 63: Glossary
LOSSARY 10BASE-T The IEEE specification for 10 Mbps Ethernet over Category 3, 4 or 5 twisted pair cable. 100BASE-TX The IEEE specification for 100 Mbps Fast Ethernet over Category 5 twisted-pair cable. 1000BASE-LX IEEE 802.3z specification for Gigabit Ethernet over 9/125 micron core single-mode fiber cable. -
Page 64: Ethernet Address
LOSSARY network, and remove them by shutting down the bridge causing the loop. Category 3 Cables One of five grades of Twisted Pair (TP) cabling defined by the EIA/TIA-568 standard. Category 3 is voice grade cable and can only be used in Ethernet networks (10BASE-T) to transmit data at speeds of up to 10 Mbps. -
Page 65: Fast Ethernet
Fast Ethernet An Ethernet system that is designed to operate at 100 Mbps. Gigabit Ethernet An Ethernet system that is designed to operate at 1000 Mbps. Full Duplex A system that allows packets to be transmitted and received at the same time and, in effect, doubles the potential throughput of a link. -
Page 66: Ip Address
LOSSARY Internet Protocol. IP is a layer 3 network protocol that is the standard for sending data through a network. IP is part of the TCP/IP set of protocols that describe the routing of packets to addressed devices. An IP address consists of 32 bits divided into two or three fields: a network number and a host number or a network number, a subnet number, and a host number. -
Page 67: Subnet Mask
Network A Network is a collection of computers and other computer equipment that are connected for the purpose of exchanging information or sharing resources. Networks vary in size, some are within a single room, others span continents. Ping Packet Internet Groper. An internet utility used to determine whether a particular IP address is online. -
Page 68: Traffic Monitoring
LOSSARY more LANs than a bridge and are generally more sophisticated. TCP/IP Transmission Control Protocol/Internet Protocol. This is the name for two of the most well-known protocols developed for the interconnection of networks. Originally a UNIX standard, TCP/IP is now supported on almost all platforms, and is the protocol of the Internet. -
Page 69: Regulatory Notices
EGULATORY OTICES FCC Statement This equipment has been tested and found to comply with the limits for a Class A digital device, pursuant to Part 15 of the FCC Rules. These limits are designed to provide reasonable protection against harmful interference in a commerical environment. - Page 70 HAPTER EGULATORY OTICES...
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Page 71: Index
NDEX Numbers 1000BASE-LX 63 1000BASE-SX 63 1000BASE-T 63 100BASE-TX 63 10BASE-T 63 802.1p Prioritization 46 auto IP configuration 29 default IP address 30 default mask 30 bandwidth 63 category 3 cables 64 category 5 cables 64 Category 5e Cables 64 Category 6 Cables 64 client 64 configuration... - Page 72 NDEX local area network 66 MAC address 66 media access control 66 network defined 67 obtaining support/feedback 47 password 51 changing 28 default (blank) 28 setting 29 positioning the Switch 13 POST 16 power cycle 42 power-on self-test See POST prioritization 802.1p 46 traffic 46...
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