Page 1: User Guide
SuperStack ® ® Switch 9000 SX User Guide http://www.3com.com/ Part No. DUA1699-0AAA02 100001-00 Rev. 02 Published April 1998...
Page 2 3Com Technologies reserves the right to revise this documentation and to make changes in content from 95052-8145 time to time without obligation on the part of 3Com Technologies to provide notiﬁcation of such revision or change. 3Com Technologies provides this documentation without warranty of any kind, either implied or expressed, including, but not limited to, the implied warranties of merchantability and ﬁtness for a particular purpose.
Page 3: Vcci Statement
VCCI Statement Information To The User If this equipment does cause interference to radio or television reception, which can be determined by turning the equipment off and on, the user is encouraged to try to correct the interference by one or more of the following measures: Reorient the receiving antenna.
Page 5: Table Of Contents
ONTENTS BOUT UIDE Introduction Terminology Finding Information in This Guide Conventions Command Syntax Symbols Line-Editing Commands Related Publications 9000 O WITCH VERVIEW About the Switch 9000 Summary of Features Port Connections Full Duplex Switch Operation Virtual LANs (VLANs) Priority Access Control Enabled (PACE) Spanning Tree Protocol (STP) IP Unicast Routing Network Conﬁguration Example...
Page 6 NSTALLATION AND ETUP Following Safety Information Determining the Switch 9000 Location Conﬁguration Rules for Gigabit Ethernet Installing the Switch 9000 Rack Mounting Free-Standing Stacking the Switch and Other Devices Connecting Equipment to the Console Port Powering-up the Switch Checking the Installation Power On Self-Test (POST) Logging on for the First Time CCESSING...
Page 7 Conﬁguring SNMP Settings 3-10 Displaying SNMP Settings 3-11 Resetting and Disabling SNMP 3-12 Checking Basic Connectivity 3-12 Ping 3-12 Traceroute 3-13 Conﬁguring Ports 3-13 Enabing and Disabling Ports 3-13 Conﬁguring Autonegotiation 3-13 Port Commands 3-14 Load Sharing 3-14 Conﬁguring Load Sharing 3-15 Verifying the Load Sharing Conﬁguration 3-16...
Page 8 Basic IP Commands 4-15 IP ARP Commands 4-16 IP Route Table Commands 4-17 ICMP Commands 4-17 4-18 RIP Commands 4-19 4-20 Logging Commands 4-21 4-22 Conﬁguration and Image Commands 4-23 (VLAN IRTUAL Overview of Virtual LANs Beneﬁts Types of VLANs Port-Based VLANs Expanding Port-Based VLANs Across Switches Tagged VLANs...
Page 9 Conﬁguring FDB Entries FDB Conﬁguration Example Displaying FDB Entries Removing FDB Entries (STP) PANNING ROTOCOL Overview of the Spanning Tree Protocol How STP Works Initialization Stabilization Reconﬁguration Spanning Tree Domains Defaults STP Conﬁgurations STP Conﬁgurations to Avoid Creating STP Domains Enabling STP on the Switch 7-10 Conﬁguring STP...
Page 10 TATUS ONITORING AND TATISTICS Status Monitoring Port Statistics Port Errors Switch Logging Local Logging Real-time Display Remote Logging Logging Commands 9-10 RMON 9-11 About RMON 9-11 About the RMON Groups 9-12 Statistics 9-12 History 9-12 Alarms 9-13 Events 9-13 Beneﬁts of RMON 9-13 Improving Efﬁciency 9-13...
Page 11 Using the Command-Line Interface VLANs Routing ECHNICAL UPPORT Online Technical Services World Wide Web Site 3Com Bulletin Board Service Access by Analog Modem Access by Digital Modem 3ComFactsSM Automated Fax Service ® 3ComForum on CompuServe Online Service Support from Your Network Supplier...
Page 12 LOSSARY NDEX ORPORATION IMITED ARRANTY...
Page 13: About This Guide
This guide provides the required information to install and conﬁgure ® the Superstack II Switch 9000 SX (3C16990). This guide is intended for use by network administrators who are responsible for installing and setting up network equipment. It assumes a basic working knowledge of:...
Page 14: Finding Information In This Guide
BOUT UIDE Finding This table shows where to ﬁnd speciﬁc information in this guide. Information in This Guide Task Location Learning concepts Chapter 1, “Switch 9000 Overview” Installing the Switch 9000 Chapter 2, “Installation and Setup” Appendix A, “Safety Information” Setting up user accounts Chapter 3, “Accessing The Switch”...
Page 15: Conventions
Conventions Conventions Table 1 and Table 2 list conventions that are used throughout this guide. Table 1 Notice Icons Icon Notice Type Alerts you to... Note Important features or instructions Caution Risk of personal injury, system damage, or loss of data Warning Risk of severe personal injury Table 2 Text Conventions...
Page 16: Command Syntax Symbols
BOUT UIDE Command Syntax You may see a variety of symbols shown as part of the command Symbols syntax. These symbols explain how to enter the command, and you do not type them as part of the command itself. Table 3 summarizes command syntax symbols.
Page 17: Line-Editing Commands
SuperStack II Switch 9000 SX Quick Reference Guide. Part Number DQA1699-OAAA03. SuperStack II Switch 9000 SX Quick Installation Guide. Part Number DIA1699-OAAA02. SuperStack II Switch 9000 SX Release Note. Part Number DNA1699-OAAA03. 3Com’s home page can be found at the following web site: http://www.3com.com/...
Page 18 BOUT UIDE...
Page 19: Switch 9000 Overview
9000 networks that can provide high-speed and high performance to serve the needs of today’s network users. ® Part of the 3Com SuperStack II range of products, the Switch 9000 provides switching between multiple Gigabit Ethernet ports. Summary of The Switch 9000 has the following features:...
Page 20: Port Connections
Provides extra security Protocol-sensitive ﬁltering for VLANs Recognition of the Priority Access Control Enabled (PACE) bit set by ® 3Com Etherlink adapters and the other devices that support PACE Responds to 802.3x ﬂow-control messages Auto-negotiation to IEEE 802.3z for plug and play Load sharing Spanning Tree Protocol (IEEE 802.1d)
Page 21: Full Duplex
VLAN sales using a device that provides routing services. For more information on VLANs, refer to Chapter 5. Priority Access Control Enabled (PACE) The Switch recognizes the PACE bit set by 3Com Etherlink ® adapters and other devices supporting PACE. When enabled, trafﬁc with these bits receives priority service from the Switch.
Page 22: Ip Unicast Routing
1: S 9000 O HAPTER WITCH VERVIEW Redundant paths are disabled when the main paths are operational. Redundant paths are enabled if the main trafﬁc paths fail. For more information on STP, refer to Chapter 7. IP Unicast Routing The Switch 9000 can route IP trafﬁc between the VLANs conﬁgured as virtual router interfaces.
Page 23 Network Configuration Example Figure 1-1 Switch 9000 used in a backbone conﬁguration The Switch 3000 on each ﬂoor is provided with a Gigabit Ethernet full-duplex link to the Switch 9000. Using Gigabit Ethernet as a backbone technology removes bottlenecks by providing scalable bandwidth, low-latency, high-speed data switching.
Page 24: Switch 9000 Front View
1: S 9000 O HAPTER WITCH VERVIEW attached to the Switch 9000 providing improved performance to the Ethernet desktop. Switch 9000 Front Figure 1-2 shows the Switch 9000 front view. View Port status LEDs Unit status LEDs Status Packet Status Gigabit Ethernet ports Gigabit Ethernet ports Figure 1-2 Switch 9000 front view...
Page 25: Leds
Switch 9000 Front View LEDs Table 1-2 describes the LED behavior on the Switch 9000. Table 1-2 Switch 9000 LEDs Color Indicates Port Status LEDs Packet Yellow Frames are being transmitted/received on this port. No activity on this port. Status Green Link is present;...
Page 26: Switch 9000 Rear View
1: S 9000 O HAPTER WITCH VERVIEW Switch 9000 Rear Figure 1-3 shows the Switch 9000 rear view. View Power socket and fuse Console port 3C16990 MADE IN USA MAIN ASSEMBLY SERIAL NUMBER MAC ADDRESS Figure 1-3 Switch 9000 rear view The rear panel has the following features: Power Socket The Switch 9000 automatically adjusts to the supply voltage.
Page 27: Factory Defaults
Factory Defaults Factory Defaults Table 1-3 shows the factory defaults for the Switch 9000 features. Table 1-3 Switch 9000 Factory Defaults Item Default Setting Port status Enabled on all ports Default user account admin with no password and user with no password Console port configuration 9600 baud, eight data bits, one stop bit, no...
Page 28 1-10 1: S 9000 O HAPTER WITCH VERVIEW...
Page 29: Installation And Setup
NSTALLATION AND ETUP This chapter describes the following: How to decide where to install the Switch 9000 Gigabit Ethernet conﬁguration rules How to install the Switch in a rack or free-standing How to connect equipment to the console port How to check the installation using the Power On Self-Test (POST) Following Safety Before installing or removing any components of the Switch, or before Information...
Page 30: Conﬁguration Rules For Gigabit Ethernet
2: I HAPTER NSTALLATION AND ETUP Water or moisture cannot enter the case of the unit. Temperature must be within the range of 0 to 40 degrees Celsius. Air-ﬂow around the unit and through the vents in the side of the case is not restricted.
Page 31: Free-Standing
Installing the Switch 9000 Figure 2-1 Fitting the mounting bracket 5 Repeat the three previous steps for the other side of the Switch. 6 Refer to the instructions that shipped with your rack, runners, shelf or tray to complete the installation of the Switch into the mounting rack. CAUTION: When using rack mounting runners, a shelf, or a tray, make sure that the ventilation holes on the side of the Switch are not obstructed.
Page 32: Stacking The Switch And Other Devices
2: I HAPTER NSTALLATION AND ETUP Stacking the Switch Up to four units can be placed on top of one another. If mixing Switch and Other Devices 9000, Switch 3000 FX, Switch 1000, Switch 1200, and other ® SuperStack II hubs, the smaller units must be positioned at the top using rubber feet.
Page 33 Connecting Equipment to the Console Port Figure 2-2 shows the pin-outs for a 9-pin to RS-232 25-pin null modem cable. Switch 9000 PC/Terminal Cable connector: 9-pin female Cable connector: 25-pin male/female Screen Shell Screen Ground Ground Figure 2-2 Null modem cable pin-outs Figure 2-3 shows the pin-outs for a 9-pin to 9-pin PC-AT serial null modem cable.
Page 34: Powering-Up The Switch
2: I HAPTER NSTALLATION AND ETUP Powering-up the To power-up the Switch, follow these steps: Switch 1 Connect the power cable to the Switch. 2 Connect the power cable to the wall outlet 3 Turn the on/off Switch to the on position. Checking the After turning on power to the Switch 9000, the device performs a Installation...
Page 35 Logging on for the First Time 5 Assign an IP address and subnetwork mask for VLAN default. The example below assigns an IP address of 123.45.67.8 and a subnetwork mask of 255.255.255.0. config vlan default ipaddress 123.45.67.8 255.255.255.0 Your changes take effect immediately. 6 Save your conﬁguration changes so that they will be in effect after the next Switch reboot, by typing save...
Page 36 2: I HAPTER NSTALLATION AND ETUP...
Page 37: Accessing The Switch
CCESSING WITCH This chapter describes the following information that you can use to begin managing the Switch 9000: Security access level overview Conﬁguring the Switch for management Switch management methods Conﬁguring SNMP CAUTION: In order for conﬁguration changes to be retained through a Switch power cycle or reboot, you must issue a SAVE command after you have made the change.
Page 38: Administrator Access Level
3: A HAPTER CCESSING WITCH Administrator Access An administrator-level account can view and change all Switch Level parameters, add and delete users, and change the password associated with any account name. The administrator can disconnect a Telnet management session. If this happens, the user is notiﬁed that the session has been terminated.
Page 39: Creating A Management Account
Security Access Levels 4 Enter the new password at the prompt. 5 Re-enter the new password at the prompt. 6 Save your changes by typing save Creating a The Switch can have a total of three management accounts. You can Management use the default names (admin and user), or you can create new names Account...
Page 40: Viewing Switch Accounts
3: A HAPTER CCESSING WITCH 3 Enter the new password at the prompt. 4 Re-enter the new password at the prompt. 5 Save your changes by typing save If you forget your password contact your local technical support representative, who will advise on your next course of action. Viewing Switch Accounts To view the accounts that have been created, you must have administrator privileges.
Page 41: Using The Console Interface
Using Telnet Using the Console The command-line interface built into the Switch is accessible by way Interface of the 9-pin, RS-232 console port located on the rear of the unit. For more information on the console port pin-outs, refer to Chapter 2. Once the connection is established, you will see the system prompt and you may log on.
Page 42: Manually Conﬁguring The Ip Settings
3: A HAPTER CCESSING WITCH You can enable BOOTP on a per-VLAN basis by using the following command: enable bootp vlan [<name> | all] Manually Conﬁguring the IP Settings If you are using IP without a BOOTP server, you must enter the IP parameters for the Switch in order for the SNMP Network Manager or Telnet software to communicate with the device.
Page 43: Disconnecting A Telnet Session
Using Telnet 4 At the password prompt, enter the password and press [Return]. When you have successfully logged on to the Switch, the command-line prompt displays the name of the Switch in its prompt. 5 Assign an IP address and subnetwork mask for the default VLAN by using the following command config vlan <name>...
Page 44: Disabling Telnet Access
Each Network Manager provides its own user interface to the ® management facilities. 3Com’s Transcend range of Network Managers all have facilities for managing the Switch. The following sections describe how to get started if you want to use an SNMP manager.
Page 45: Accessing Switch Agents
Using SNMP Accessing Switch In order to have access to the SNMP agent residing in the Switch, at Agents least one VLAN on the Switch must have an IP address assigned to it. For more information on assigning an IP address, refer to “Manually Conﬁguring the IP Settings,”...
Page 46: Conﬁguring Snmp Settings
3-10 3: A HAPTER CCESSING WITCH Table 3-3 Supported Traps (continued) Trap Description Falling alarm Indicates that an RMON alarm entry has crossed its falling threshold. Fan fail Indicates that one or more of the cooling fans inside the device has failed. A Fan okay trap will be issued once the fan has attained normal operation.
Page 47: Displaying Snmp Settings
Using SNMP 3-11 Table 3-4 SNMP Conﬁguration Commands Command Description config vlan <name> ipaddress <ip_address> {<mask>} Configures an IP address for the VLAN. This is required in order to use an SNMP manager. enable snmp access Allows you to turn on SNMP support for the Switch.
Page 48: Resetting And Disabling Snmp
3-12 3: A HAPTER CCESSING WITCH Authorized SNMP station list SNMP trap receiver list Logon statistics Resetting and To reset or disable SNMP settings, use the commands in Table 3-5. Disabling SNMP Table 3-5 SNMP Reset and Disable Commands Command Description disable snmp access Allows you to disable SNMP on the Switch.
Page 49: Traceroute
Configuring Ports 3-13 Options for the ping command are described in Table 3-6. Table 3-6 Ping Command Parameters Parameter Description continuous Allows you to specify ICMP echo messages to be sent continuously. size <n> Allows you to specify the size of the packet. Traceroute The traceroute command allows you to trace the routed path between the Switch and a destination endstation.
Page 50: Port Commands
3-14 3: A HAPTER CCESSING WITCH To conﬁgure the Switch to autonegotiate, use the following command: config port <portlist> auto on Port Commands Table 3-7 describes port commands. Table 3-7 Port Commands Command Description Allows you to enable 802.3z autonegotiation. config port <portlist>...
Page 51: Conﬁguring Load Sharing
Load Sharing 3-15 Load sharing is most useful in cases where the trafﬁc transmitted from the Switch to the load-sharing group is sourced from an equal or greater number of ports on the Switch. For example, trafﬁc transmitted to a 2-port load-sharing group should originate from a minimum of two other ports on the same Switch.
Page 52: Verifying The Load Sharing Conﬁguration
3-16 3: A HAPTER CCESSING WITCH The following example deﬁnes a load-sharing group that contains ports 4 through 7, and uses the ﬁrst port in the group as the master logical port 4: enable sharing 4 grouping 4-7 In this example, logical port 4 represents physical ports 4 through 7. When using load sharing, you should always reference the master logical port of the load-sharing group (port 4 in the previous example) when conﬁguring or viewing VLANs.
Page 53: Commands
OMMANDS This chapter contains a description of each command-line interface command for the Switch 9000. It also provides the following information related to Switch 9000 commands: Command syntax Line editing commands Command history substitution If an asterisk (*) appears in front of the command-line prompt, it indicates that you have outstanding conﬁguration changes that have not been saved.
Page 54: Syntax Helper
4: C HAPTER OMMANDS If the command does not include a parameter, skip to Step 3. If the command requires more information, or if you want to include optional parameters, continue to Step 2a. a If the command has additional parameters include them after the command name.
Page 55: Numerical Ranges
Understanding the Command Syntax config vlan engineering add port 1-3,6 could use the following shortcut: config engineering add port 1-3, 6 Numerical Ranges Commands that require you to enter one or more port numbers use the parameter, in the syntax. A portlist can be a range of <portlist>, numbers, for example: port 1-3...
Page 56: Line-Editing Commands
4: C HAPTER OMMANDS Table 4-1 Command Syntax Symbols (continued) Symbol Description vertical bar | Separates mutually exclusive items in a list, one of which must be entered. For example, in the syntax config snmp community [read | write] <string> you must specify either the read or write community string in the command.
Page 57: Command History Substitution
Command History Substitution Command History The Switch 9000 “remembers” the last 50 commands you enter. You Substitution can display a list of these commands by using the following command: history Common Table 4-3 describes common commands used to manage the Switch. Commands Commands speciﬁc to a particular feature are described in the other chapters of this guide.
Page 58: Switch 9000 Commands
4: C HAPTER OMMANDS Table 4-3 Common Commands (continued) Command Description Allows you to reset all Switch parameters (with the unconfig switch {all} exception of defined VLANs and IP addresses) to the factory defaults. If you specify the keyword “all”, the IP addresses are reset as well.
Page 59: General Switch Commands
Switch 9000 Commands General Switch Table 4-4 describes general Switch commands. Commands Table 4-4 General Switch Commands Command Description Displays the current Switch information, including: show switch sysName, sysLocation, sysContact MAC address current date and time, and system uptime operating environment (temperature, fans, and power supply status) NVRAM image information (primary/secondary image, date, time, size, version)
Page 60: User Account Commands
4: C HAPTER OMMANDS Table 4-4 General Switch Commands (continued) Command Description config devicemode [bridging | iprouting] Allows you to configure the operating mode of the Switch. Specify: bridging — Layer 2 bridging functions only iprouting — Bridging and IP unicast routing functions If this command is used to change the operating mode of the Switch 9000 once it is up and running, it causes...
Page 61: Switch Management Commands
Switch 9000 Commands Switch Management Table 4-6 describes Switch management commands Commands Table 4-6 Switch Management Commands Command Description Displays network management configuration and show management statics including enable/disable states for Telnet and SNMP, SNMP community strings, authorized SNMP station list, SNMP trap receiver list, and logon statistics. Displays the currently active Telnet and console show session sessions communicating with the Switch.
Page 62: Vlan Commands
4-10 4: C HAPTER OMMANDS Table 4-6 Switch Management Commands (continued) Command Description Allows you to configure the name of the system config snmp syscontact <string> contact. A maximum of 32 characters is allowed Allows you to configure the name of the Switch. The config snmp sysname <string>...
Page 63: Protocol Commands
Switch 9000 Commands 4-11 Protocol Commands Table 4-8 describes protocol commands. Table 4-8 Protocol Commands Command Description Allows you to display protocol-related information, show protocol {<protocol_name> | all} including: Protocol name List of protocol fields List of VLANs that use this protocol Allows you to create a user-defined protocol.
Page 64: Port Commands
4-12 4: C HAPTER OMMANDS Table 4-9 FDB Commands (continued) Command Description Allows you to create a permanent FDB entry. Specify create fdbentry <mac_address> vlan <name> the following: <portlist> mac_address — device MAC address, using colon separated bytes name — VLAN associated with MAC address portlist —...
Page 65: Pace Commands
Port Commands 4-13 Table 4-10 Port Commands Command Description Allows you to enable one or more ports. enable port <portlist> Allows you to disable one or more ports. disable port <portlist> PACE Commands Table 4-11 describes PACE commands. Table 4-11 PACE Commands Command Description Allows you to enable recognition of the PACE bit.
Page 66 4-14 4: C HAPTER OMMANDS Table 4-12 STP Commands (continued) Command Description Allows you to specify the time (in seconds) that the config stpd <stpd_name> forwarddelay ports on this STPD spend in the listening and learning <value> states when the Switch is the Root Bridge. The range is 4 through 30.
Page 67: Basic Ip Commands
Port Commands 4-15 Basic IP Commands Table 4-13 describes basic IP commands. Table 4-13 Basic IP Commands Command Description Displays configuration information for one or more show ipconfig {vlan [<name> | all]} VLANs, including the following: IP address, subnet mask IP forwarding information BOOTP configuration VLAN name, VLANid...
Page 68: Ip Arp Commands
4-16 4: C HAPTER OMMANDS Table 4-13 Basic IP Commands (continued) Command Description Allows you to disable the generation and processing disable bootp vlan [<name> | all] of BOOTP packets. Allows you to enable the BOOTP relay function on enable bootprelay the router.
Page 69: Ip Route Table Commands
Port Commands 4-17 IP Route Table Table 4-15 describes IP route table commands. Commands Table 4-15 IP Route Table Commands Command Description Allows you to display the contents of the IP routing show iproute {vlan {<name> | all | table. permanent | <ipaddress>...
Page 70 4-18 4: C HAPTER OMMANDS Table 4-16 ICMP Commands (continued) Command Description Allows you to enable the modification of route table enable icmp useredirects information when an ICMP redirect message is received. The default setting is disabled. Allows you to disable the changing of routing table disable icmp useredirects information when an ICMP redirect message is received.
Page 71: Rip Commands
Port Commands 4-19 RIP Commands Table 4-17 describes the commands used to conﬁgure the RIP protocol. Table 4-17 RIP Commands Command Description Displays RIP configuration and statistics for one or more show rip {vlan <name> | all} VLANs. Display includes the state for RIP settings, and interface states.
Page 72 4-20 4: C HAPTER OMMANDS Table 4-17 RIP Commands (continued) Command Description Allows you to enable the advertisement of static enable rip exportstatic routes using RIP. The default setting is enabled. Allows you to disable the filtering of static routes. disable rip exportstatic Allows you to change the periodic RIP update timer.
Page 73: Logging Commands
Port Commands 4-21 Logging Commands Table 4-18 describes Switch logging commands. Table 4-18 Logging Commands Command Description Displays the log configuration, including the syslog show log config host IP address, the priority level of messages being logged locally, and the priority level of messages being sent to the syslog host.
Page 74 4-22 4: C HAPTER OMMANDS Table 4-18 Logging Commands (continued) Command Description Allows you to configure the syslog host address and config syslog <ipaddress> <facility> filter messages sent to the syslog host. Options include: {<priority>} {<subsystem>} ipaddress — The IP address of the syslog host. facility —...
Page 75: Conﬁguration And Image Commands
Port Commands 4-23 Conﬁguration and Table 4-19 describes conﬁguration and image commands Image Commands Table 4-19 Conﬁguration and Image Commands Command Description Allows you to save the current configuration of the save {config} {primary | secondary} Switch to NVRAM. You can specify the primary or secondary configuration area.
Page 76 4-24 4: C HAPTER OMMANDS...
Page 77: Virtual Lan S (Vlan S )
(VLAN IRTUAL Setting up Virtual Local Area Networks (VLANs) on the Switch 9000 eases many time-consuming tasks of network administration while increasing efﬁciency in network operations. This chapter describes the VLAN concepts and explains how to implement VLANs on the Switch 9000. Overview of Virtual A VLAN is a group of location- and topology-independent devices, for LANs...
Page 78: Types Of Vlans
5: V (VLAN HAPTER IRTUAL It helps to control trafﬁc. With traditional networks, congestion can be caused by broadcast trafﬁc that is directed to all network devices, regardless of whether they require it. VLANs increase the efﬁciency of your network because each VLAN can be set up to contain only those devices that need to communicate with each other.
Page 79 Overview of Virtual LANs For example, in Figure 5-1, the VLANs are conﬁgured as followings: Ports 1, 2, and 5 are part of VLAN Marketing Ports 3, 4, and 6 are part of VLAN Sales Ports 7 and 8 are part of VLAN Finance Marketing Finance Sales...
Page 80: Expanding Port-Based Vlans Across Switches
5: V (VLAN HAPTER IRTUAL Expanding Port-Based VLANs Across Switches To create a port-based VLAN that spans two Switches you must do two things: Assign the port on each Switch to the VLAN. Cable the two Switches together using one port on each Switch per VLAN.
Page 81 Overview of Virtual LANs Figure 5-3 illustrates two VLANs spanning two Switches. On Switch 1, ports 1–4 are part of VLAN Accounting; ports 5–8 are part of VLAN Engineering. On Switch 2, ports 1–4 are part of VLAN Accounting; ports 5–8 are part of VLAN Engineering. VLAN Accounting spans Switch 1 and Switch 2 by way of a connection between Switch 1 port 2 and Switch 2 port 4.
Page 82: Tagged Vlans
5: V (VLAN HAPTER IRTUAL Tagged VLANs The Switch 9000 uses the IEEE 802.1Q D4 draft standard for rules associated with VLAN tagging. Tagging is a process that inserts a marker (called a tag) into the Ethernet frame. The tag contains the identiﬁcation number of a speciﬁc VLAN, called the VLANid.
Page 83 Overview of Virtual LANs Figure 5-4 illustrates the physical view of a network that uses tagged and untagged trafﬁc. Switch 1 = Marketing = Sales 802.1Q = Tagged port Tagged server Switch 2 Figure 5-4 Physical diagram of tagged and untagged trafﬁc Figure 5-5 shows a logical diagram of the same network.
Page 84: Mixing Port-Based And Tagged Vlans
5: V (VLAN HAPTER IRTUAL In Figure 5-4 and Figure 5-5: The trunk port on each Switch carries trafﬁc for both VLAN Marketing and VLAN Sales. The trunk port on each Switch is tagged. The server connected to port 1 on Switch 1 has a NIC that supports 802.1Q tagging.
Page 85: Predeﬁned Protocol Filters
Overview of Virtual LANs The IP trafﬁc has been divided into two IP subnets, 192.207.35.0 and 192.207.36.0. The subnets are internally routed by the Switch 9000. The subnets are assigned different VLAN names, Finance and Personnel, respectively. The remainder of the trafﬁc belongs to the VLAN named MyCompany.
Page 86: Deﬁning Protocol Filters
5-10 5: V (VLAN HAPTER IRTUAL Deﬁning Protocol Filters If necessary, you can deﬁne a customized protocol ﬁlter based on EtherType, LLC, and/or SNAP. Up to six ﬁlters may be part of a protocol ﬁlter. To deﬁne a protocol ﬁlter, do the following: Create a protocol using the following command: create protocol <protocol_name>...
Page 87: The Default Vlan
Configuring VLANs on the Switch 9000 5-11 The Default VLAN The Switch 9000 ships with one default VLAN that has the following properties: The VLAN name is default. It contains all the ports on a new or initialized Switch. The default VLAN is untagged, and has no VLANid or protocol ﬁlter assigned.
Page 88: Vlan Conﬁguration Examples
5-12 5: V (VLAN HAPTER IRTUAL Table 5-1 describes the commands used to conﬁgure a VLAN. Table 5-1 VLAN Conﬁguration Commands Command Description Allows you to create a named VLAN. create vlan <name> Allows you to create a user-defined protocol. create protocol <protocol_name>...
Page 89: Displaying Vlan Settings
Displaying VLAN Settings 5-13 The following example creates a tag-based VLAN named video. It assigns the VLANid 1000. Ports 4–8 are added as tagged ports to the VLAN. create vlan video config video tag 1000 config video add port 4-8 tagged The following example creates a VLAN named Sales , with the VLANid 120.
Page 90: Protocol Information
5-14 5: V (VLAN HAPTER IRTUAL Status for each port Enabled/disabled Tagged/untagged Protocol information IP address STPD information Sample output from this command is as follows: 3C16990:7 # sh vlan all VLAN "Default" created by user Tagging: 802.1Q Tag 1 192.207.37.214/255.255.255.0 STPD: Domain "s0"...
Page 91: Deleting And Resetting Vlans
Deleting and Resetting VLANs 5-15 Sample output from this command is as follows: show protocol all Protocol Name Type Value ----------------- ---- ----- etype 0x0806 etype 0x0800 etype 0x8137 netbios 0xf0f0 decnet etype 0x6004 etype 0x6003 This show command displays protocol information, including the following: Protocol name List of protocol ﬁelds...
Page 92 5-16 5: V (VLAN HAPTER IRTUAL...
Page 93: Switch Forwarding Database (Fdb)
WITCH ORWARDING (FDB) ATABASE This chapter describes the contents of the Switch forwarding database (FDB), how the FDB works, and how to conﬁgure the FDB. Overview of the The Switch 9000 maintains a database of all addresses received on all of its ports.
Page 94: Pace Prioritization
6: S (FDB) HAPTER WITCH ORWARDING ATABASE Permanent entries — Permanent entries are retained in the database if the Switch is reset or a power off/on cycle occurs. The system administrator must make entries permanent. A permanent entry can either be a unicast or multicast MAC address. All entries entered by way of the command-line interface are stored as permanent.
Page 95: Conﬁguring Fdb Entries
Configuring FDB Entries Conﬁguring FDB To conﬁgure entries in the FDB, use the commands listed in Table 6-1. Entries Table 6-1 FDB Conﬁguration Commands Command Description Allows you to create a permanent FDB entry. Specify the create fdbentry <mac_address> vlan following: <name>...
Page 96: Removing Fdb Entries
6: S (FDB) HAPTER WITCH ORWARDING ATABASE portlist — displays the entries for one or more ports permanent — displays all permanent entries The following sample output shows the information displayed when you request output for all FDB entries: show fdb Hash Vlan Flags...
Page 97: Spanning
(STP) PANNING ROTOCOL Using the Spanning Tree Protocol (STP) functionality of the Switch 9000 makes your network more fault tolerant. The following sections describe STP concepts, and how STP features are supported by the Switch. STP is a part of the 802.1d bridge speciﬁcation deﬁned by the IEEE Computer Society.
Page 98 7: S (STP) HAPTER PANNING ROTOCOL Figure 7-1 Network with an illegal topology This conﬁguration is illegal because it creates loops that cause the network to overload. However, STP allows you to use this conﬁguration because STP detects duplicate paths and immediately prevents (or blocks) one of them from forwarding trafﬁc.
Page 99: How Stp Works
Overview of the Spanning Tree Protocol If the link through Bridge C fails, as shown in Figure 7-3, the STP system reconﬁgures the network so that trafﬁc from segment 2 ﬂows through Bridge B. Figure 7-3 Trafﬁc ﬂowing through Bridge B How STP Works STP has the following three stages of operation: Initialization...
Page 100: Stabilization
7: S (STP) HAPTER PANNING ROTOCOL The Root Bridge generates BPDUs on all ports at a regular interval known as the Hello Time. All other bridges in the network have a Root Port. This is the port that costs the least in getting to the Root Bridge, and it is used for receiving the BPDUs initiated by the Root Bridge.
Page 101: Defaults
Spanning Tree Domains Within any given STPD, all VLANs belonging to it use the same spanning tree. Care must be taken to ensure that STPD instances within a single Switch do not see each other in the same broadcast domain. This could happen if, for example, another external bridge is used to connect VLANs belonging to separate STPDs.
Page 102: Stp Conﬁgurations
7: S (STP) HAPTER PANNING ROTOCOL STP Conﬁgurations When you assign VLANs to an STPD, pay careful attention to the STP conﬁguration and its effect on the forwarding of VLAN trafﬁc. Figure 7-4 illustrates a network that uses VLAN tagging for trunk connections.
Page 103 STP Configurations When the Switches in this conﬁguration start up, STP conﬁgures each STP domain such that there are no active loops in the topology. STP could conﬁgure the topology in a number of ways to make it loop-free. In Figure 7-4, the connection between Switch A and Switch B is put into blocking state, and the connection between Switch Y and Switch Z is put into blocking state.
Page 104: Stp Conﬁgurations To Avoid
7: S (STP) HAPTER PANNING ROTOCOL STP Conﬁgurations Within a single STPD, you must be careful when conﬁguing your to Avoid VLANs. The following figures illustrate networks that have been incorrectly set up so that the STP conﬁguration disables the ability of the Switches to forward VLAN trafﬁc.
Page 105: Creating Stp Domains
Creating STP Domains Figure 7-6 shows a similar conﬁguration in which the VLANs are all port-based. The trunk connections between the Switches require one trunk port per Switch for each VLAN. Marketing & Sales Marketing, Sales & Engineering Marketing Sales Switch 1 Switch 3 Switch 2...
Page 106: Enabling Stp On The Switch
7-10 7: S (STP) HAPTER PANNING ROTOCOL Enabling STP on To enable STP for one or more STP domains on your Switch, use the the Switch following command at the administrator prompt: enable stpd [<stpd_name> | all] Conﬁguring STP You can conﬁgure the following STP parameters for each STPD on the Switch: Hello Time Forward Delay...
Page 107 Configuring STP 7-11 Table 7-1 STP Conﬁguration Commands (continued) Command Description Allows you to remove one or all VLANs from an STPD. If config stpd <stpd_name> delete vlan all is specified, the association between the STPD and [<name> | all] VLAN is removed, but both still exist.
Page 108: Conﬁguration Example
7-12 7: S (STP) HAPTER PANNING ROTOCOL Conﬁguration The following example creates and enables an STPD named Example Backbone_st. It assigns the Manufacturing VLAN to the STPD. It disables STP on ports 1 through 3, and port 4. create stpd backbone_st config stpd backbone_st add vlan manufacturing enable stpd backbone_st disable stpd backbone_st port 1-3,4...
Page 109 Displaying STP Settings 7-13 Sample output from the command is as follows: 3C16990:28 # sh stpd s0 po 5-8 Stpd: s0 Port: 8 PortId: 8008 Stp: ENABLED Path Cost: 4 Port State: FORWARDING Topology Change Ack: FALSE Port Priority: 128 Designated Root: 80:00:08:00:4e:2c:13:00 Designated Cost: 0 Designated Bridge: 80:00:08:00:4e:2c:13:00 Designated Port Id: 8008...
Page 110: Disabling And Resetting Stp
7-14 7: S (STP) HAPTER PANNING ROTOCOL Disabling and To disable STP or return STP settings to their defaults, use the Resetting STP commands listed in Table 7-2. Table 7-2 STP Disable and Reset Commands Command Description Allows you to remove an STPD. An STPD can only be delete stpd <stpd_name>...
Page 111: Ip Unicast Routing
IP U NICAST OUTING This chapter describes how to conﬁgure IP routing on the Switch 9000. It assumes that you are already familiar with IP unicast routing. If not, refer to the following publications for additional information: RFC 1058 — Routing Information Protocol RFC 1256 —...
Page 112: Populating The Routing Table
8: IP U HAPTER NICAST OUTING the router interface for Finance is assigned the IP address 192.206.35.1. Personnel belongs to the IP network 192.207.36.0; its router interface is assigned IP address 192.207.36.1. Trafﬁc within each VLAN is switched using the Ethernet MAC addresses. Trafﬁc between the two VLANs is routed using the IP addresses.
Page 113: Dynamic Routes
Overview of IP Unicast Routing Dynamic Routes Dynamic routes are typically learned by way of RIP. Routers using RIP exchange information in their routing tables in the form of RIP advertisements. Using dynamic routes, the routing table contains only networks that are reachable. Dynamic routes are aged out of the table when a RIP update for the network is not received for a period of time.
Page 114: Conﬁguring Ip Unicast Routing
8: IP U HAPTER NICAST OUTING Conﬁguring IP This section describes the commands associated with conﬁguring IP Unicast Routing unicast routing on the Switch 9000. Conﬁguring routing involves the following steps: Verify the Switch operating mode is set to , by using the iprouting following command: show switch...
Page 115: Verifying The Ip Unicast Routing Conﬁguration
Verifying the IP Unicast Routing Configuration Verifying the IP Use the command to display the current conﬁguration show iproute Unicast Routing of IP unicast routing for the Switch, and for each VLAN. The show Conﬁguration command displays the currently configured routes, including iproute how each route was learned.
Page 116 8: IP U HAPTER NICAST OUTING Table 8-1 describes the commands used to conﬁgure basic IP settings on the Switch. Table 8-1 Basic IP Commands Command Description Enables the generation and processing of enable bootp {vlan <name> | all} BOOTP packets on a VLAN to obtain an IP address for the VLAN from a BOOTP server.
Page 117 Configuring DHCP/BOOTP Relay Table 8-1 Basic IP Commands (continued) Command Description Removes the dynamic entries in the IP clear ipfdb [<ipaddress> | vlan <name> | all] forwarding database. Table 8-2 describes the commands used to conﬁgure the IP route table. Table 8-2 Route Table Conﬁguration Commands Command Description...
Page 118 8: IP U HAPTER NICAST OUTING Table 8-3 RIP Conﬁguration Commands (continued) Command Description Enables the split horizon algorithm for RIP. Default setting is enable rip splithorizon enabled. Enables triggered updates. Triggered updates are a enable rip triggerupdate mechanism for immediately notifying a router’s neighbors when the router adds or deletes routes, or changes the metric of a route.
Page 119 Configuring DHCP/BOOTP Relay Table 8-3 RIP Conﬁguration Commands (continued) Command Description Disables split horizon. disable rip splithorizon Disables poison reverse. disable rip poisonreverse Disables triggered updates disable rip triggerupdate Disables the filtering of static routes. disable rip exportstatic Resets all RIP parameters to the default VLAN. Does not unconfig rip {vlan <name>...
Page 120: Routing Conﬁguration Example
8-10 8: IP U HAPTER NICAST OUTING Table 8-4 ICMP Conﬁguration Commands (continued) Command Description Resets all router advertisement settings to the default values. unconfig irdp Disables the generation of ICMP redirects on one or more disable icmp redirects {vlan <name> | VLANs.
Page 121 Routing Configuration Example 8-11 192.207.35.1 192.207.36.1 My Company 192.207.35.0 192.207.36.0 Finance Personnel NetBIOS NetBIOS NetBIOS NetBIOS = IP traffic = NetBIOS traffic Figure 8-2 Unicast Routing Conﬁguration Example In this conﬁguration, all IP trafﬁc from stations connected to ports 1 and 3 have access to the router by way of the VLAN Finance.
Page 122: Displaying Router Settings
8-12 8: IP U HAPTER NICAST OUTING Displaying Router To display settings for various IP routing components, use the Settings commands listed in Table 8-5. Table 8-5 Router Show Commands Command Description Displays configuration information for one or more VLANs, show ip config {vlan <name>...
Page 123: Resetting And Disabling Router Settings
Resetting and Disabling Router Settings 8-13 Table 8-5 Router Show Commands (continued) Command Description Displays RIP-specific statistics. Statistics include the show rip stat {vlan <name> | all} following per interface: Packets transmitted Packets received Bad packets received Bad routes received Number of RIP peers Peer information Resetting and...
Page 124 8-14 8: IP U HAPTER NICAST OUTING Table 8-6 Router Reset and Disable Commands (continued) Command Description Disables RIP for one or more VLANs. When RIP is disabled, the disable rip {vlan <name> | all} parameters are not reset to their defaults, and the states are not cleared.
Page 125 TATUS ONITORING AND TATISTICS This chapter describes how to view the current operating status of the Switch, how to display information in the Switch log, and how to take advantage of the RMON capabilities available in the Switch. Viewing statistics on a regular basis allows you to: Monitor how well your network is performing Monitor emerging trends and notice problems arising before they cause major network faults...
Page 126: Status Monitoring And Statistics
9: S HAPTER TATUS ONITORING AND TATISTICS Table 9-1 Switch Monitoring Commands (continued) Command Description show ip config {vlan <name> | all} Displays configuration information for one or more VLANs, including the following: IP address, subnet mask IP forwarding information BOOTP configuration VLAN name, VLANid Displays the current Address Resolution Protocol (ARP) cache...
Page 127: Status Monitoring
Status Monitoring Table 9-1 Switch Monitoring Commands (continued) Command Description Displays collision statistics for each port. show port <portlist> collisions Displays state, link status, speed, and autonegotiation setting show port <portlist> config for each port. Displays error information for one or more ports. show port <portlist>...
Page 128: Port Statistics
9: S HAPTER TATUS ONITORING AND TATISTICS Table 9-1 Switch Monitoring Commands (continued) Command Description show stpd <stpd_name> port <portlist> Displays port-specific STP information, including STP port configuration and state. Displays the current Switch information, including: show switch sysName, sysLocation, sysContact MAC address current time and date, and system uptime operating environment (temperature, fans, and power...
Page 129 Port Statistics The following port statistic information is collected by the Switch: Link Status — The current status of the link. Options are: Ready — The port is ready to accept a link. Active — The link is present at this port. Transmit Packet Count (Tx Pkt Count) —...
Page 130: Port Errors
9: S HAPTER TATUS ONITORING AND TATISTICS Port Errors The Switch 9000 keeps track of errors for each port. To view port error, type show port <portlist> errors The following port error information is collected by the Switch: Link Status — The current status of the link. Options are: Ready —...
Page 131: Switch Logging
Switch Logging Receive Jabber Frames (RX Jab) — The total number of frames received by the port that were of longer than the support maximum length and had a Cyclic Redundancy Check (CRC) error. Receive Alignment Errors (RX Align) — The total number of frames received by the port that occurs if a frame has a CRC error and does not contain an integral number of octets.
Page 132: Local Logging
9: S HAPTER TATUS ONITORING AND TATISTICS Table 9-3 Fault Log Subsystems Subsystem Description Brdg Bridge-related functionality. Examples include low table space and queue overflow. SNMP SNMP information. Examples include community string violations. Telnet Information related to Telnet logon and configuration performed by way of a Telnet session.
Page 133: Remote Logging
Switch Logging If priority is not speciﬁed, only messages of critical priority are displayed. If the subsystem is not speciﬁed, all subsystems are displayed. If you enable the log display on a terminal connected to the console port, your settings will remain in effect even after your console session is ended (unless you explicitly disable the log display).
Page 134: Logging Commands
9-10 9: S HAPTER TATUS ONITORING AND TATISTICS Logging Commands The commands described in Table 9-4 allow you to do the following: Conﬁgure logging options Reset logging options Display the log Clear the log Table 9-4 Logging Commands Command Description Allows you to configure the real-time log display.
Page 135: Rmon
RMON features supported by the Switch 9000. You can only use the RMON features of the Switch if you have an RMON management application, such as the RMON application supplied with 3Com’s Transcend® Enterprise Manager. About RMON RMON is the common abbreviation for the Remote Monitoring Management Information Base (MIB) system deﬁned by the Internet...
Page 136: About The Rmon Groups
9-12 9: S HAPTER TATUS ONITORING AND TATISTICS A typical RMON setup consists of the following two components: The RMON probe — An intelligent, remotely controlled device or software agent that continually collects statistics about a LAN segment or VLAN. The probe transfers the information to a management workstation on request or when a predeﬁned threshold is crossed.
Page 137: Alarms
RMON 9-13 Alarms The Alarms group provides a versatile, general mechanism for setting threshold and sampling intervals to generate events on any MIB variable. Alarms inform you of a network performance problem and they can trigger automated action responses through the Events group. Events Effective use of the Events group saves you time.
Page 138: Rmon And The Switch
RMON requires one probe per LAN segment, and stand-alone RMON Switch probes have traditionally been expensive. Therefore, 3Com’s approach has been to build an inexpensive RMON probe into the agent of each Switch. This allows RMON to be widely deployed around the network without costing more than traditional network management.
Page 139: About Event Actions
RMON 9-15 When using the RMON features of the Switch, you should note the following: After the default sessions are created, they have no special status. You can delete or change them as required. The greater the number of RMON sessions, the greater the burden on the management resources of the Switch.
Page 140 9-16 9: S HAPTER TATUS ONITORING AND TATISTICS...
Page 141: Software Upgrade And Boot Options
OFTWARE PGRADE AND PTIONS This chapter describes the procedure for upgrading the Switch software image. It also covers how to save and load a primary and secondary conﬁguration ﬁle on the Switch. Upgrading the The image ﬁle contains the executable code that runs on the Switch Software 9000.
Page 142: Rebooting The Switch
10-2 10: S HAPTER OFTWARE PGRADE AND PTIONS You can select which image the Switch will load on the next reboot by using the following command: use image {primary | secondary} If you do not specify which image to use, the Switch automatically loads the primary image.
Page 143: Returning To Factory Defaults
Boot Option Commands 10-3 Returning to Factory To return the Switch conﬁguration to factory defaults, use the following Defaults command: unconfig switch This command resets the entire conﬁguration, with the exception of user accounts and passwords that have been conﬁgured. To reset all parameters, use the following command: unconfig switch all Boot Option...
Page 144 10-4 10: S HAPTER OFTWARE PGRADE AND PTIONS...
Page 145: Safety Information
AFETY NFORMATION You must read the following safety information before carrying out any installation or removal of components, or any maintenance procedures on the Switch 9000. Important Safety Information WARNING: Warnings contain directions that you must follow for your personal safety. Follow all instructions carefully Please read the following safety information thoroughly before installing the Switch 9000.
Page 146: Power Cord
A: S PPENDIX AFETY NFORMATION This unit operates under SELV (Safety Extra Low Voltage) conditions according to IEC 950. The conditions are only maintained if the equipment to which it is connected also operates under SELV conditions. The appliance coupler (the connector to the unit and not the wall plug) must have a conﬁguration for mating with an EN60320/IEC320 appliance inlet.
Page 147: Fuse
Important Safety Information If the power cord plug is unsuitable and must be replaced, you may ﬁnd other codings for the respective connections. Connect the power supply wires for the unit according to the following scheme: Brown wire to the Live (Line) plug terminal which may be marked with the letter ‘L’...
Page 148: Lithium Battery
A: S PPENDIX AFETY NFORMATION Lithium Battery Replace the lithium battery with the same or equivalent type, as recommended by the manufacturer. WARNING: There is a danger of explosion if the battery is incorrectly replaced. Dispose of used batteries according to the manufacturers instructions.
Page 149: Power
L’information de Sécurité Importante Pour réduire les risques d'incendie ou de choc électrique, installez ce groupe sous abri dans une zone dont la température et l'humidité sont régulées et qui ne contient pas de produits contaminateurs conductifs. Power Pour garantir le respect des normes internationales de sécurité, utilisez uniquement l'adaptateur électrique remis avec cet appareil.
Page 150: Cordon Électrique
A: S PPENDIX AFETY NFORMATION Cordon électrique Il doit être agréé dans le pays d'utilisation : Etats-Unis et Le cordon doit avoir reçu l'homologation des UL Canada et un certiﬁcat de la CSA Le cordon souple doit respecter, à titre minimum, les spéciﬁcations suivantes : calibre 18 AWG type SV ou 5J...
Page 151: Ports Pour Fibres Optiques
L’information de Sécurité Importante porte-fusibles. Pour ce groupe, vous devez uniquement utiliser des fusibles réalisés par le même constructeur et offrant le même pouvoir de coupure et respectant le même type que le fusible d'origine. Refermez le porte-fusibles. Fuse Pour respecter les normes européennes de sécurité, il ne faut pas monter un fusible de rechange sur l'admission de cet appareil.
Page 152: Wichtige Sicherheitsinformationen
A: S PPENDIX AFETY NFORMATION les batteries au lithium ne ﬁgurent pas sur la liste EPA des déchets dangereux. Par conséquent, vous pouvez en général vous en débarrasser comme s'il s'agissait d'un déchet normal. si vous souhaitez vous débarrasser de quantités importantes, contactez un service local de gestion des déchets.
Page 153: Power Cord
Wichtige Sicherheitsinformationen Das Gerät muß an eine geerdete Steckdose angeschlossen werden, die die europäischen Sicherheitsnormen erfüllt. Das Gerät nicht an eine Wechselstromsteckdose anschließen, die nicht geerdet ist. Die Netzsteckdose muß in der Nähe des Geräts und leicht zugänglich sein. Die Stromversorgung des Geräts kann nur durch Herausziehen des Gerätenetzkabels aus der Netzsteckdose unterbrochen werden.
Page 154: Faseroptikanschlüsse - Optische Sicherheit
A-10 A: S PPENDIX AFETY NFORMATION Fuse Zur Erfüllung europäischer Sicherheitsnormen darf keine Ersatzsicherung am Geräteeingang angebracht werden. Es dürfen nur Sicherungen vom gleichen Hersteller, der gleichen Marke und Art mit dem Gerät verwendet werden. Faseroptikanschlüsse Niemals mit einem Vergrößerungsgerät ein Übertragungs-LED/Laser - Optische Sicherheit betrachten, während dieses eingeschaltet ist.
Page 155: Lithiumbatterie
Wichtige Sicherheitsinformationen A-11 Lithiumbatterie Die Lithiumbatterie nach den Empfehlungen des Herstellers durch eine Batterie des gleichen oder eines gleichwertigen Typs ersetzen. WARNHINWEIS: Wird die Batterie falsch ersetzt, besteht Explosionsgefahr. Verbrauchte Batterien nach den Angaben des Herstellers entsorgen. Batterien nicht in Wasser eintauchen oder verbrennen. Die Entsorgungsbestimmungen sind je nach Land verschieden.
Page 156 A-12 A: S PPENDIX AFETY NFORMATION...
Page 157: Echnical Specifications
ECHNICAL PECIFICATIONS Physical Dimensions Height: 3.5 inches x Width: 17.32 inches x Depth: 17.32 inches Weight: 22 pounds Environmental Requirements Operating Temperature 0 to 40˚ C Storage Temperature -10 to 70 ˚ C Operating Humidity 10% to 95% relative humidity, noncondensing Standards EN60068 (IEC68) Safety...
Page 158 B: T PPENDIX ECHNICAL PECIFICATIONS Standards Supported SNMP Protocols Used for Administration SNMP protocol (RFC 1157) UDP (RFC 768) MIB-II (RFC 1213) IP (RFC 791) Bridge MIB (RFC 1493) ICMP (RFC 792) VLAN MIB (RFC 1573) TCP (RFC 793) RMON MIB (RFC 1757) ARP (RFC 826) Terminal Emulation TFTP (RFC 783)
Page 159: Leds
ROUBLESHOOTING If you encounter problems when using the Switch, this Appendix may be helpful. If you have a problem which is not listed here or in the release notes, please contact your local technical support representative. LEDs Power LED does not light: Check that the power cable is ﬁrmly connected to the device and to the supply outlet.
Page 160: Using The Command-Line Interface
C: T PPENDIX ROUBLESHOOTING Both sides if the gigabit link must be enabled or disabled. It the two are different, typically the side with auto-negotiation disabled will have the link LED list, and the side with auto-negotiation enabled will not list. The default conﬁguration for a gigabit port is auto-negotiation enabled.
Page 161 Using the Command-Line Interface Traps are not received by the SNMP Network Manager: Check that the SNMP Network Manager's IP address and community string are correctly conﬁgured and that the IP address of the Trap Receiver is conﬁgured properly on the Switch. The SNMP Network Manager or Telnet workstation can no longer access the device: Check that Telnet access or SNMP access is enabled.
Page 162: Vlans
C: T PPENDIX ROUBLESHOOTING You forget your password and cannot log on: If you are not an administrator, another user having administrator access level can log on, delete your user name, and create a new user name for you, with a new password. Alternatively, another user having administrator access level can log in and initialize the device.
Page 163: Stp
Using the Command-Line Interface VLAN Names: There are restrictions on VLAN names. They cannot contain white spaces and cannot start with a numeric value unless you use quotation marks around the name. If a name contains white spaces or starts with a numeric, you must use quotation marks whenever referring to the VLAN name.
Page 164: Routing
C: T PPENDIX ROUBLESHOOTING The Switch keeps aging out endstation entries in the Switch Forwarding Database (FDB): Reduce the number of topology changes by disabling STP on those Switches that do not use redundant paths. Specify that the endstation entries are static or permanent. Routing The Switch sees RIP updates but other routers don’t: Ensure that the RIP transmit and receive modes are appropriate for the...
Page 165: Support
For the very latest, we recommend that you access 3Com Corporation’s World Wide Web site as described below. Online Technical 3Com offers worldwide product support 24 hours a day, 7 days a Services week, through the following online systems:...
Page 166: Access By Digital Modem
3Com Corporation’s interactive fax service, 3ComFacts, provides data Automated Fax sheets, technical articles, diagrams, and troubleshooting instructions on Service 3Com products 24 hours a day, 7 days a week. Call 3ComFacts using your Touch-Tone telephone using one of these international access numbers: Country...
Page 167: 3Comforum On Compuserve Online Service
3ComForum on 3ComForum is a CompuServe-based service containing patches, CompuServe ® software, drivers, and technical articles about all 3Com products, as Online Service well as a messaging section for peer support. To use 3ComForum, you need a CompuServe account. To use 3ComForum: 1 Log on to CompuServe.
Page 168: Support From 3Com
Support from 3Com If you are unable to receive support from your network supplier, technical support contracts are available from 3Com. Contact your local 3Com sales ofﬁce to ﬁnd your authorized service provider using one of these numbers: Regional Sales Office...
Page 169: Returning Products For Repair
Returning Products for Repair Returning Products Before you send a product directly to 3Com for repair, you must ﬁrst be for Repair obtain a Return Materials Authorization (RMA) number. Products sent to 3Com without RMA numbers will be returned to the sender unopened, at the sender’s expense.
Page 170 D: T PPENDIX ECHNICAL UPPORT...
Page 171 LOSSARY ageing The automatic removal of dynamic entries from the Switch Database that have timed-out and are no longer valid. Address Resolution Protocol. The protocol used to dynamically bind high-level IP addresses to low-level hardware addresses. ARP is used only across a single physical network and is limited to networks that support hardware broadcasts.
Page 172 LOSSARY CSMA/CD Carrier Sense Multiple Access/Collision Detection that is a channel access method used by Ethernet and IEEE 802.3 standards in which devices transmit only after ﬁnding the data channel clear for some period of time. When two devices transmit simultaneously, a collision occurs and the colliding devices delay their retransmissions for a random amount of time.
Page 173 Non-volatile RAM. NVRAM retains its contents when the Switch is powered off. PACE Priority Access Control Enabled that is 3Com’s innovative technology to work in conjunction with a switch in order to control the latency and jitter associated with the transmission of multimedia trafﬁc over Ethernet and Fast Ethernet.
Page 174 Trivial File Transfer Protocol that allows the transfer of ﬁles (such as software upgrades) from a remote device using the Switch’s local management capabilities. Transcend 3Com’s umbrella management system used to manage all of 3Com’s networking solutions. trap A message sent by an SNMP agent to an authorized trap receiver (usually a network management station) to indicate the occurrence of a signiﬁcant event, such as an error condition or a threshold that has...
Page 175 NDEX NDEX EMC statement Events (RMON group) 9-13, 9-14 fax service. See 3ComFacts conﬁguring Numerics creating a permanent entry 3Com Bulletin Board Service (3ComBBS) displaying 3Com sales ofﬁces dynamic entries 3Com URL entries 3ComFacts permanent entries 3ComForum removing entries static entries 4-14, 7-11 forward delay, conﬁguring...
Page 176 NDEX dynamic routes populating static routes rack mounting 8-12 settings, displaying 10-2 rebooting Remote Monitoring. See RMON reset button resetting to factory defaults 10-3 returning products for repair LEDs 3-14 load sharing conﬁguration commands (table) 3-15 Load Sharing, conﬁguring enabling log display RMON logging...
Page 177 LEDs World Wide Web positioning rack mounting rear view size stacking with other devices weight syslog host technical support 3Com URL bulletin board service fax service network suppliers product repair using CompuServe Telnet disconnecting a session using 10-1 TFTP server...
Page 178 NDEX...
Page 179 ARRANTY ARDWARE 3Com warrants its hardware products to be free from defects in workmanship and materials, under normal use and service, for the following lengths of time from the date of purchase from 3Com or its Authorized Reseller: Network adapters...
Page 180 IMITATION OF IABILITY TO THE FULL EXTENT ALLOWED BY LAW, 3COM ALSO EXCLUDES FOR ITSELF AND ITS SUPPLIERS ANY LIABILITY, WHETHER BASED IN CONTRACT OR TORT (INCLUDING NEGLIGENCE), FOR INCIDENTAL, CONSEQUENTIAL, INDIRECT, SPECIAL, OR PUNITIVE DAMAGES OF ANY KIND, OR FOR LOSS OF REVENUE...

This manual is also suitable for:

Superstack ii 9000 sx 3c16990

3Com 9000 SX User Manual

About this Guide

Switch 9000 Overview

Installation and Setup

Accessing the Switch

Commands

Virtual Lan S (Vlan S )

Switch Forwarding Database (Fdb)

Spanning

Ip Unicast Routing

Status Monitoring and Statistics

Software Upgrade and Boot Options

Safety Information

Echnical Specifications

100 C Troubleshooting

Support

Quick Links

User Guide

Related Manuals for 3Com 9000 SX

Summary of Contents for 3Com 9000 SX

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Table of Contents