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3Com 7757 Quick Reference Manual

3com 7757: reference guide
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3C
S
OM
WITCH
Q
R
UICK
EFERENCE
Overview
This Quick Reference Guide applies to the following Switch 7750 models.
SSwitch 7750 8-slot AC Chassis (3C16896)
Switch 7750 8-slot DC Chassis (3C16897)
Switch 7750 7-slot Chassis (3C16895)
Switch 7750 4-slot Chassis (3C16894)
About the Command Line Interface
To use and navigate the command line interface of your unit, please refer to the following points for assistance:
When initially accessing the command line interface, press Enter when prompted. The User View
displays. This is indicated by the chevron brackets around the name of the unit at the prompt, for example,
<sw7750>.
When in the System View menu, square brackets appear around the name of the unit at the
[sw7750].
You must be in the System View menu to access the configurable CLI commands.
Some commands can be entered directly at any prompt from anywhere in the interface.
If you enter part of a command followed by a ? (with no space between), the CLI will show you
that begin in that way.
The term 'view' may be used interchangeably with the term 'menu'.
c
The
ommand is placed before the command you wish to undo, for example,
undo
password.
<CTRL-A> places the cursor back to the start of the command line.
Enter the first few characters of a command and press TAB to enter the full command without
entire command (where there is only one command that starts with the entered characters).
Use the Up Arrow key at the prompt to repeat the previous command string.
Use the Delete key to delete the character after the cursor; the Backspace key deletes the character
When entering physical port numbers, Enter the port number as
physical port number.
Copyright © 2006-2007, 3Com Corporation. All rights reserved.
www.3Com.com
Part Number: 10016396 Rev. AA
Published: December 2007
7750 F
AMILY
G
UIDE
undo setauthentication
, where x is the unit
number and z is the
x/0/z
menu for the unit
prompt, for example,
all the commands
having to input the
before the cursor.

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Summary of Contents for 3Com 7757

  • Page 1 Use the Delete key to delete the character after the cursor; the Backspace key deletes the character ■ When entering physical port numbers, Enter the port number as ■ physical port number. Copyright © 2006-2007, 3Com Corporation. All rights reserved. www.3Com.com Part Number: 10016396 Rev. AA Published: December 2007 AMILY...
  • Page 2: Obtaining Help

    Use the flow-interval command to set the interval to perform statistics on port information. Use the undo flow-interval command to restore the default interval. 3Com Switch 7750 Family Quick Reference Guide . For example: the unit. accompanied...
  • Page 3 3Com Switch 7750 Family Quick Reference Guide holdtime Use the holdtime command to configure the holdtime of a switch. Use the undo holdtime command to restore the default holdtime value. ip-pool Use the ip-pool command to configure a private IP address range for cluster members on the switch to be configured as the management device.
  • Page 4 Use the undo apply community command to cancel the BGP community attribute setting . apply cost Use the apply cost command to configure the route cost value of route information. Use the undo apply cost command to cancel the apply statement. 3Com Switch 7750 Family Quick Reference Guide User interface view System view...
  • Page 5 3Com Switch 7750 Family Quick Reference Guide apply cost-type Use the apply cost-type command to set the routing cost type of routing information. Use the undo apply cost-type command to cancel the setting argument. apply ip next-hop Use the apply ip next-hop command to set the IP address of next hop.
  • Page 6 Use the undo arp timer gratuitous-updating command to restore the default gratuitous ARP update interval. asbr-summary Use the asbr-summary command to configure the aggregation of imported routes by OSPF. Use the undo asbr-summary command to cancel the aggregation. 3Com Switch 7750 Family Quick Reference Guide System view System view VLAN interface view...
  • Page 7 3Com Switch 7750 Family Quick Reference Guide ascii Use the ascii command to specify that files be transferred in the ASCII mode. attack-protection Use the attack-protection command to set global Telnet protection. After you execute this command, the system protects all the Layer-3 interfaces in the Up state.
  • Page 8 Use the boot boot-loader command to specify the APP file that will be adopted when the switch reboots next time. boot boot-loader primary Use the boot boot-loader primary command to specify the primary startup file at next booting. 3Com Switch 7750 Family Quick Reference Guide BGP view System view...
  • Page 9 3Com Switch 7750 Family Quick Reference Guide boot bootrom Use the boot bootrom command to update the Boot ROM. boot bootrom default Use the boot bootrom default command to use the current startup file to upgrade the Boot ROMs. boot bootrom default Use the boot bootrom default command to upgrade the Boot ROM by using the current boot file.
  • Page 10 Use the command-privilege level command to set the level of the specified command in a specified view. Use the undo command-privilege view command to restore the level of the specified command in the specified view to the default. 3Com Switch 7750 Family Quick Reference Guide FTP client view...
  • Page 11 3Com Switch 7750 Family Quick Reference Guide compare-different-as-med Use the compare-different-as-med command to enable comparison of MED values from different AS neighboring routes when determining the best route. Use the undo compare-different-as-med command to disable the comparison. confederation id Use the confederation id command to configure confederation identifier.
  • Page 12 Use the default type command to configure the default type when OSPF imports external routes. Use the undo default type command to restore the default type when OSPF imports external routes. 3Com Switch 7750 Family Quick Reference Guide BGP view...
  • Page 13 3Com Switch 7750 Family Quick Reference Guide default-cost Use the default-cost command to configure the cost of the default route transmitted by OSPF to the STUB or NSSA area. Use the undo default-cost command to restore the default cost of the default route transmitted by OSPF to the STUB or NSSA area.
  • Page 14 If the address pool identified by the pool-name argument already exists, this command leads you to DHCP address pool view. Use the undo dhcp server ip-pool command to remove a specified DHCP address pool. 3Com Switch 7750 Family Quick Reference Guide System view...
  • Page 15 3Com Switch 7750 Family Quick Reference Guide dhcp server nbns-list Use the dhcp server nbns-list command to configure WINS server IP address(es) for the specified DHCP interface address pool(s). Use the undo dhcp server nbns-list command to remove the WINS server IP address(es) configured for the specified DHCP interface address pool(s).
  • Page 16 Use the display acl mode command to view the ACL running mode chosen by the switch for filtering the traffic. display acl order Use the display acl order command to display the match order of the ACL rules sent to a port. 3Com Switch 7750 Family Quick Reference Guide System view System view...
  • Page 17 3Com Switch 7750 Family Quick Reference Guide display acl remaining entry Use the display acl remaining entry slot command to display the remaining ACL entries on a specified slot. The displayed content includes the entry resource type, total entries resource number, reserved entries number for system ACL, number of configured ACL entries, number of remaining ACL entries, and the corresponding start port number and end port number of each type of entry.
  • Page 18 Use the display cluster candidates command to display the information about the candidate devices of a cluster. display cluster members Use the display cluster members command to display the information about cluster members. 3Com Switch 7750 Family Quick Reference Guide Any view Any view...
  • Page 19 3Com Switch 7750 Family Quick Reference Guide display connection Use the display connection command to display information about the specified user connection or all user connections, so as to troubleshoot user connections. display cpu Use the display cpu command to display the CPU usage of a specified switch.
  • Page 20 Use the display gmrp statistics command to view the statistics information about GMRP. display gmrp status Use the display gmrp status command to view the status of global GMRP. 3Com Switch 7750 Family Quick Reference Guide Any view Any view...
  • Page 21 3Com Switch 7750 Family Quick Reference Guide display gvrp statistics Use the display gvrp statistics command to display the GVRP statistics of specified or all trunk ports. display gvrp status Use the display gvrp status command to display the global GVRP status (enabled or disabled).
  • Page 22 Use the display ip userlog export command to display the configuration and statistics of NAT logging. display ipx interface Use the display ipx interface command to view the IPX information of the specified VLAN interface. 3Com Switch 7750 Family Quick Reference Guide Any view...
  • Page 23 3Com Switch 7750 Family Quick Reference Guide display ipx routing-table Use the display ipx routing-table command to view the IPX routing information. display ipx service-table Use the display ipx service-table command to view the contents of the IPX service information table.
  • Page 24 VLAN or all the VLANs on the switch. display msdp brief Use the display msdp brief command to display the brief information of the MSDP peer state. 3Com Switch 7750 Family Quick Reference Guide Any view...
  • Page 25 3Com Switch 7750 Family Quick Reference Guide display msdp peer-status Use the display msdp peer-status command to display the detailed information of the MSDP peer state. display msdp sa-cache Use the display msdp sa-cache command to display (S, G) state learned from an MSDP peer.
  • Page 26 Use the display ospf peer statistics command to display the statistics of every OSPF peer, namely, the number of peers in various states in every area. display ospf request-queue Use the display ospf request-queue command to display the information about the OSPF request-queue. 3Com Switch 7750 Family Quick Reference Guide Any view Any view Any view...
  • Page 27 3Com Switch 7750 Family Quick Reference Guide display ospf retrans-queue Use the display ospf retrans-queue command to display the information about the OSPF retransmission queue. display ospf routing Use the display ospf routing command to display the information about OSPF routing table.
  • Page 28 If you specify the interface-type interface-number argument, you will view the queue scheduling mode parameter of the specified port. 3Com Switch 7750 Family Quick Reference Guide Any view...
  • Page 29 3Com Switch 7750 Family Quick Reference Guide display qos-interface traffic-bandwidth Use the display qos-interface traffic-bandwidth command to view the configuration information about bandwidth guarantee. display qos-interface traffic-limit Use the display qos-interface traffic-limit command to view the traffic limit configuration of a port or all the ports of a switch, including the applied ACLs for traffic limit, committed average rate (CAR), and the corresponding actions.
  • Page 30 Use the display snmp-agent command to view the switch fabric ID of the current device. display snmp-agent community Use the display snmp-agent community command to view the information about the currently configured community names for SNMPv1 or SNMPv2c. 3Com Switch 7750 Family Quick Reference Guide Any view Any view...
  • Page 31 3Com Switch 7750 Family Quick Reference Guide display snmp-agent group Use the display snmp-agent group command to view group name, security model, state of various views and storage models. display snmp-agent mib-view Use the display snmp-agent mib-view command to view the MIB view configuration information of the current Ethernet switch.
  • Page 32 Use the display transceiver diagnosis interface command to display the currently measured value of digital diagnosis parameters of a single or all anti-spoofing transceivers customized by 3Com. display transceiver interface Use the display transceiver interface command to display main parameters of a single or all transceivers.
  • Page 33 3Com Switch 7750 Family Quick Reference Guide display udp statistics Use the display udp statistics command to view the statistics about UDP packets. display udp-helper server Use the display udp-helper server command to display the information about the configured destination servers connected to a specified VLAN interface and the number of the packets forwarded to each destination server.
  • Page 34 Use the undo domain-name command to remove the domain name. dot1x Use the dot1x command to enable 802.1x globally or for specified Ethernet ports. Use the undo dot1x command to disable 802.1x globally or for specified Ethernet ports. 3Com Switch 7750 Family Quick Reference Guide System view System view...
  • Page 35 3Com Switch 7750 Family Quick Reference Guide dot1x authentication-method Use the dot1x authentication-method command to set the 802.1x authentication method. Use the undo dot1x authentication-method command to revert to the default 802.1x authentication method. dot1x dhcp-launch Use the dot1x dhcp-launch command to specify an 802.1x-enqbled switch to launch the process to authenticate a supplicant system when the supplicant system applies for a dynamic IP address through DHCP.
  • Page 36 Use the filter-policy export command to enable IS-IS to filter the routes advertised by other routing protocols. Use the undo filter-policy export command to disable the configured filter rules. 3Com Switch 7750 Family Quick Reference Guide System view, Ethernet port view...
  • Page 37 3Com Switch 7750 Family Quick Reference Guide filter-policy export Use the filter-policy export command to filter the advertised routes and only the routes passing the filter can be advertised by BGP. Use the undo filter-policy export command to cancel the filtration to the advertised routes.
  • Page 38 Use the undo gratuitous-arp-learning enable command to disable gratuitous ARP learning. group Use the group group-name command to configure a peer group. Use the undo group group-name command to cancel the configuration. 3Com Switch 7750 Family Quick Reference Guide NQA test group view User view...
  • Page 39 3Com Switch 7750 Family Quick Reference Guide gvrp Use the gvrp command to enable GVRP globally (in system view) or for a port (in Ethernet port view). Use the undo gvrp command to disable GVRP globally (in system view) or on a port (in Ethernet port view).
  • Page 40 Use the igmp group-limit command to limit the number of multicast groups on an interface. The router does not process new packets when number of IGMP groups exceeds the limit. Use the undo igmp group-limit command to restore the default setting. 3Com Switch 7750 Family Quick Reference Guide System view...
  • Page 41 3Com Switch 7750 Family Quick Reference Guide igmp group-policy Use the igmp group-policy command to set the filter of multicast groups on the VLAN interface to control the access to IP multicast groups. igmp group-policy vlan Use the igmp group-policy vlan command to set the filter of multicast groups on a port to control the access to the IP multicast groups.
  • Page 42 In the IGMP-snooping-enabled VLAN, only one IGMP report packet is sent to the upstream router port in an interval. Use the undo igmp-snooping report-aggregation command to disable suppression on Layer 2 multicast IGMP report packets. 3Com Switch 7750 Family Quick Reference Guide VLAN interface view VLAN interface view...
  • Page 43 3Com Switch 7750 Family Quick Reference Guide igmp-snooping router-aging-time Use the igmp-snooping router-aging-time command to configure the aging time of the router port. Use the undo igmp-snooping router-aging-time command to restore the default aging time. igmp-snooping version Use the igmp-snooping version command to configure the IGMP Snooping version in the current VLAN.
  • Page 44 Use the ip address command to specify an IP address and mask for a VLAN or loopback interface. Use the undo ip address command to remove an IP address and mask of a VLAN or loopback interface. 3Com Switch 7750 Family VLAN interface view/Loopback interface view/M-Ethernet interface view...
  • Page 45 3Com Switch 7750 Family Quick Reference Guide ip address Use the ip address command to specify an IP address and subnet mask for the VLAN interface. Use the undo ip address command to remove the IP address and subnet mask of the VLAN interface.
  • Page 46 Use the ip userlog nat active-time command to set the wait interval to log active NAT connections. Use the undo ip userlog nat active-time command to disable the logging of active connections. 3Com Switch 7750 Family Quick Reference Guide System view or Netstream aggregation view...
  • Page 47 3Com Switch 7750 Family Quick Reference Guide ip userlog nat export host Use the ip userlog nat export host command to set the address and port number of the global destination server for log packets. Use the undo ip userlog nat export host command to restore the default settings for global destination server.
  • Page 48 Use the ipx sap timer update command to configure a SAP update interval. Use the undo ipx sap timer update command to restore the default value. 3Com Switch 7750 Family Quick Reference Guide VLAN interface view...
  • Page 49 3Com Switch 7750 Family Quick Reference Guide ipx service Use the ipx service command to add a static service entry to the service information table. Use the undo ipx service command to delete a static service entry from the service information table.
  • Page 50 Use the undo lacp system-priority command to restore the default system priority. language-mode Use the language-mode command to toggle between the language modes (that is, language environments) of the command line interface (CLI) to meet your requirement. 3Com Switch 7750 Family Quick Reference Guide Interface view Interface view...
  • Page 51 3Com Switch 7750 Family Quick Reference Guide Use the lcd command to display the local work directory on the FTP client. level Use the level command to set the priority level of the user. Use the undo level command to restore the default priority level of the user.
  • Page 52 Use the mac-address max-mac-count command to set the maximum number of MAC addresses an Ethernet port can learn. Use the undo mac-address max-mac-count command to cancel the limitation on the number of MAC addresses an Ethernet port can learn. 3Com Switch 7750 Family Quick Reference Guide Cluster view IS-IS view...
  • Page 53 3Com Switch 7750 Family Quick Reference Guide mac-address multicast interface Use the mac-address multicast command to manually add a multicast MAC address entry. Use the undo mac-address multicast command to remove a multicast MAC address entry. mac-address security Use the mac-address security command to manually add a security MAC address to a port.
  • Page 54 Use the undo mirroring-group mirroring-slot command to remove the mirroring source I/O Module. mirroring-group monitor-port Use the mirroring-group monitor-port command to configure the destination port. Use the undo mirroring-group monitor-port to remove the configuration of the destination port. 3Com Switch 7750 Family Quick Reference Guide System view IS-IS view...
  • Page 55 3Com Switch 7750 Family Quick Reference Guide mirroring-group monitor-slot Use the mirroring-group monitor-slot command to configure the destination mirroring I/O Module, which must be LS81VSNP or LS82VSNP. In order to mirror a port to a I/O Module, the mirroring group must be active.
  • Page 56 Use the multicast-vlan enable command to configure the current VLAN as a multicast VLAN. Use the undo multicast-vlan enable command to disable the current VLAN from being a multicast VLAN. 3Com Switch 7750 Family Quick Reference Guide User view...
  • Page 57 3Com Switch 7750 Family Quick Reference Guide multicast-vlan subvlan Use the multicast-vlan subvlan command to configure one or multiple VLANs as the sub-VLAN(s) of the multicast VLAN. Use the undo multicast-vlan subvlan command to cancel the sub-VLANs of the multicast VLAN.
  • Page 58 Use the undo network command to disable RIP on the interface. network Use the network command to enable an interface to run the OSPF protocol. Use the undo network command to disable an interface from running OSPF. 3Com Switch 7750 Family Quick Reference Guide VLAN interface view VLAN interface view...
  • Page 59 3Com Switch 7750 Family Quick Reference Guide network Use the network command to advertise the network segment route to the BGP routing table. Use the undo network command to cancel the existing configuration. network-entity Use the network-entity command to configure the network entity title (NET) for an IS-IS routing process.
  • Page 60 Use the open command to establish a control connection with an FTP server. option Use the option command to customize DHCP options for a global DHCP address pool. Use the undo option command to remove the customized DHCP options. 3Com Switch 7750 Family Quick Reference Guide VLAN interface view VLAN interface view...
  • Page 61 3Com Switch 7750 Family Quick Reference Guide originating-rp Use the originating-rp command to allow MSDP peer to use the specified interface IP address as the RP address in the SA message when the MSDP peer creates SA messages. Use the undo originating-rp command to cancel configuration.
  • Page 62 Use the peer connect-interface command to specify the source interface of a route update packet. Use the undo peer connect-interface command to restore the best source interface. 3Com Switch 7750 Family Quick Reference Guide User interface view FTP client view...
  • Page 63 3Com Switch 7750 Family Quick Reference Guide peer default-route-advertise Use the peer default-route-advertise command to send the default route to the peer group. Use the undo peer default-route-advertise command to cancel the sending of the default route to the peer group.
  • Page 64 Use the undo peer timer command to restore the default value of the timer. peer-public-key end Use the peer-public-key end command to return to system view from public key view. 3Com Switch 7750 Family Quick Reference Guide BGP view/BGP multicast address family view...
  • Page 65 3Com Switch 7750 Family Quick Reference Guide Use the pim command to enter PIM view to configure the global PIM parameters. You cannot use the pim command to enable the PIM protocol. Use the undo pim command to exit PIM view to system view and clear the global PIM configuration parameters.
  • Page 66 Use the port hybrid protocol-vlan vlan command to associate a port with the protocol-based VLAN. Use the undo port hybrid protocol-vlan vlan command to remove the association between the specified protocol-based VLAN and a port. 3Com Switch 7750 Family Quick Reference Guide Ethernet port view and PoE profile view...
  • Page 67 3Com Switch 7750 Family Quick Reference Guide port hybrid pvid vlan Use the port hybrid pvid vlan command to set the default VLAN ID for the hybrid port. Use the undo port hybrid pvid command to restore the default VLAN ID of the port.
  • Page 68 Use the preference command to set preference values for. routes learned from external peers, routes learned from internal peers, and local-originated routes. Use the undo preference command to restore the default preference values. 3Com Switch 7750 Family Quick Reference Guide Ethernet port view...
  • Page 69 3Com Switch 7750 Family Quick Reference Guide primary accounting Use the primary accounting command to set the IP address and port number of the primary RADIUS accounting server. Use the undo primary accounting command to restore the default IP address and port number of the primary RADIUS accounting server.
  • Page 70 Use the quit command to terminate an FTP connection and quit to user view. quit Use the quit command to terminate the connection to the remote SFTP server and exit to system view. 3Com Switch 7750 Family Quick Reference Guide Public key edit view...
  • Page 71 3Com Switch 7750 Family Quick Reference Guide radius nas-ip Use the radius nas-ip command to set the source address used by the NAS to send RADIUS packets. Use the undo radius nas-ip command to restore the default setting. radius scheme Use the radius scheme command to create a RADIUS scheme and enter its view.
  • Page 72 Use the reset garp statistics command to clear the GARP statistics (such as the information about the packets received/sent/discarded by GVRP/GMRP) on specified or all ports. reset hwtacacs statistics Use the reset hwtacacs statistics command to clear HWTACACS protocol statistics. 3Com Switch 7750 Family Quick Reference Guide SFTP Client view RIP view...
  • Page 73 3Com Switch 7750 Family Quick Reference Guide reset igmp group Use the reset igmp group command to delete an existing IGMP group from the VLAN interface. The deleted group can be added to the VLAN interface again. reset igmp-snooping statistics Use the reset igmp-snooping statistics command to clear IGMP Snooping statistics.
  • Page 74 Use the reset udp statistics command to clear the statistics information about UDP packets. reset udp-helper packet Use the reset udp-helper packet command to clear the statistics about the packets forwarded by UDP-Helper. 3Com Switch 7750 Family Quick Reference Guide User view User view...
  • Page 75 3Com Switch 7750 Family Quick Reference Guide reset vrrp statistics Use the reset vrrp command to clear the statistics information about VRRP. retry Use the retry command to set the maximum number of transmission attempts of RADIUS requests. Use the undo retry command to restore the default maximum number of transmission attempts.
  • Page 76 Use the router id command to configure the ID of a router running the OSPF protocol. Use the undo router id command to cancel the router ID that has been set. 3Com Switch 7750 Family Quick Reference Guide Interface view...
  • Page 77 3Com Switch 7750 Family Quick Reference Guide router id Use the router id command to configure the ID of a BGP router. Use the undo router id command to cancel the router ID that has been set. rrpp domain Use the rrpp domain command to create an RRPP domain and enter RRPP domain view.
  • Page 78 Use the service-type command to authorize the user to access the specified type(s) of service(s). Use the undo service-type command to inhibit the user from accessing the specified type(s) of service(s). 3Com Switch 7750 Family Quick Reference Guide User view...
  • Page 79 3Com Switch 7750 Family Quick Reference Guide set authentication password Use the set authentication password command to set the local password. Use the undo set authentication password command to remove the local password. set backboard enhance Use the set backboard enhance command to set the running mode of cross-card HG clock to enhanced mode (frequency: 187MHz).
  • Page 80 Use the snmp-agent local-switch fabricid command to set the switch fabric ID of the local SNMP entity. Use the undo snmp-agent local-switch fabricid command to restore the default setting. snmp-agent mib-view Use the undo snmp-agent mib-view command to cancel the current setting. 3Com Switch 7750 Family Quick Reference Guide User view User view User view...
  • Page 81 3Com Switch 7750 Family Quick Reference Guide snmp-agent packet max-size Use the snmp-agent packet max-size command to set the maximum size of SNMP packet that the Agent can send/receive. snmp-agent sys-info Use the snmp-agent sys-info command to configure system information such as geographical location of the device, information for system maintenance and version information of running SNMP.
  • Page 82 Use the ssh server compatible-ssh1x enable command to make the server compatible with the SSH1.x version-supporting client. Use the undo ssh server compatible-ssh1x enable command to make the server not compatible with the SSH1.x version-supporting client. 3Com Switch 7750 Family Quick Reference Guide Ethernet port view Ethernet port view...
  • Page 83 3Com Switch 7750 Family Quick Reference Guide ssh server rekey-interval Use the ssh server rekey-interval command to set the update interval for the server key. Use the undo ssh server rekey-interval command to cancel the current configuration. ssh server timeout Use the ssh server timeout command to set authentication timeout time for SSH connections.
  • Page 84 Use the undo stp interface cost command to revert to the default path cost(s) of the specified port(s) in the specified spanning tree instance in system view. 3Com Switch 7750 Family Quick Reference Guide RADIUS scheme view...
  • Page 85 3Com Switch 7750 Family Quick Reference Guide stp interface edged-port Use the stp interface edged-port enable command to configure the specified Ethernet port(s) as edge ports in system view. Use the stp interface edged-port disable command to configure the specified Ethernet port(s) as non-edge ports in system view.
  • Page 86 Use the stp tc-protection enable command to enable the TC-BPDU attack guard function. Use the stp tc-protection disable command to disable the TC-BPDU attack guard function. 3Com Switch 7750 Family Quick Reference Guide Ethernet port view System view...
  • Page 87 3Com Switch 7750 Family Quick Reference Guide stp tc-protection threshold Use the stp tc-protection threshold command to set the upper threshold of the times for a switch to remove its MAC address table within 10 seconds. Use the undo stp tc-protection threshold command to cancel the configuration.
  • Page 88 Use the sysname command to set the system name of the Ethernet switch. Changing the system name will affect the CLI prompt. For example, if the system name of the switch is 3Com, the prompt for user view is <SW7750>.
  • Page 89 3Com Switch 7750 Family Quick Reference Guide terminal trapping Use the terminal trapping command to enable terminal trap information display. Use the undo terminal trapping command to disable this function. test-enable Use the test-enable command to execute a NQA test.
  • Page 90 Use the traffic-accounting accounting-slot command to specify a traffic accounting slot. Use the undo traffic-accounting accounting-slot command to remove the specified traffic accounting slot. 3Com Switch 7750 Family Quick Reference Guide IS-IS view RADIUS scheme view HWTACACS scheme view...
  • Page 91 3Com Switch 7750 Family Quick Reference Guide traffic-accounting traffic-group Use the traffic-accounting traffic-group command to create a traffic group or enter the view of an existing traffic group. Use the undo traffic-accounting traffic-group command to delete an existing traffic group.
  • Page 92 Use the virtual-cable-test command to enable the system to test the cable connected to a specific port and to display the results. The system can test these attributes of the cable: 3Com Switch 7750 Family Quick Reference Guide VLAN interface view...
  • Page 93 Use the voice vlan legacy command to enable the voice VLAN legacy function. This function realizes the communication between 3Com’s devices and other vendors’ voice devices by automatically adding the voice VLAN tags to the voice data coming from other vendors’ voice devices.
  • Page 94 Use the vrrp vrid virtual-ip command to add a virtual router IP address to an existing backup group. Use the undo vrrp vrid virtual-ip command to remove a virtual router IP address from an existing backup group. 3Com Switch 7750 Family Quick Reference Guide System view...

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