3com 3C16896 Quick Reference Manual

www.3Com.com

Part Number: 10016396 Rev. AA

Published: December 2007

3COM SWITCH 7750 FAMILY

QUICK REFERENCE GUIDE

Overview

This Quick Reference Guide applies to the following Switch 7750 models.

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 menu for the unit

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 prompt, for example,

[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 all the commands

that begin in that way.

■ The term ‘view’ may be used interchangeably with the term ‘menu’.

■ The undo command is placed before the command you wish to undo, for example, undo setauthentication

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 having to input the

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 before the cursor.

■ When entering physical port numbers, Enter the port number as x/0/z, where x is the unit number and z is the

physical port number.

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)

1146 administrator-address 3Com Switch 7750 Family

Quick Reference Guide

Displaying Command Parameters

At the prompt, enter the name of the command followed by a space and ?. For example:

<sw7750boot ?

The following parameters are displayed:

attribute-switch

Exchange the file main-attribute and backup-attribute.

boot-loader

Select a file to boot at the next time

bootrom

Update Bootrom

web-package

Set web resource package

To specify boot loader, enter the command as follows:

<sw7750>boot boot-loader ?

You only need to enter ? if parameters exist for the command.

Displaying Parent Menus

At the prompt, enter quit.

Displaying the User View Menu

Press <CTRL-Z>.

Obtaining Help

At the prompt, enter ?.

Further Information

For further information about how to use the command line interface, refer to the Command Reference Guide and

the Configuration Guide, which are both available as PDF documents on the CD that

accompanied the unit.

Commands

administrator-address Cluster view

Use the administrator-address command to set the MAC address of the management device on a

member device.

Use the undo administrator-address command to remove a member device from the cluster.

dhcp-snooping information vlan circuit-id Ethernet port view

Use the dhcp-snooping information vlan circuit-id command to configure the content of the circuit

ID field in Option 82.

Use the undo dhcp-snooping information circuit-id command to restore the default.

display cluster Any view

Use the display cluster command to display the state and statistics of the cluster to which the current switch

belongs.

flow interval Ethernet port view

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 holdtime 1147

Quick Reference Guide

holdtime Cluster view

Use the holdtime command to configure the holdtime of a switch.

Use the undo holdtime command to restore the default holdtime value.

ip-pool Cluster view

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.

Use the undo ip-pool command to cancel the IP address range configuration.

snmp-host Cluster view

Use the snmp-host command to configure an SNMP host for the member devices inside a cluster on the

management device.

Use the undo snmp-host command to cancel the SNMP host configuration.

abr-summary OSPF Area view

Use the abr-summary command to enable route aggregation on an area border router (ABR).

Use the undo abr-summary command to disable route aggregation on an ABR.

access-limit ISP domain view

Use the access-limit command to set the maximum number of access users that can be contained in current

ISP domain.

Use the undo access-limit command to restore the default maximum number.

accounting ISP domain view

Use the accounting command to configure the accounting scheme that will be used by current ISP domain.

Use the undo accounting command to remove the accounting scheme used by current ISP domain.

accounting enable Traffic accounting view

Use the accounting enable command to enable the traffic accounting function on the traffic accounting

module.

Use the undo accounting enable command to disable the traffic accounting function on the traffic

accounting module.

accounting optional ISP domain view

Use the accounting optional command to open the accounting-optional switch.

Use the undo accounting optional command to close the accounting-optional switch.

accounting optional RADIUS scheme view/ISP domain view

Use the accounting optional command to open the accounting-optional switch.

Use the undo accounting optional command to close the accounting-optional switch so that users are

charged forcibly.

accounting-mode traffic ISP domain view

Use the accounting-mode traffic command to set the accounting mode to traffic accounting.

Use the undo accounting-mode traffic command to restore the default accounting mode.

accounting-on enable RADIUS scheme view

Use the accounting-on enable command to enable the user re-authentication upon device restart

function.

Use the undo accounting-on enable command to disable the user re-authentication upon device restart

function and restore the default interval and maximum number of attempts to transmit Accounting-On packets.

Use the undo accounting-on send command to restore the default maximum number of attempts to

transmit Accounting-On packets.

Use the undo accounting-on interval command to restore the default interval to transmit

Accounting-On packets.

acl System view

Use the acl command to define an ACL and enter the corresponding ACL view.

Use the undo acl command to delete all entries of an ACL identified by a number or a name, or the entire

ACL.

1148 acl 3Com Switch 7750 Family

Quick Reference Guide

acl User interface view

Use the acl command to apply an ACL to filter Telnet users.

Use the undo acl command to disable the switch from filtering Telnet users using the ACL.

acl mode System view

Use the acl mode command to set the traffic classification mode for the device.

acl order System view

Use the acl order command to set the match order for the ACL rules sent to hardware.

active region-configuration MST region view

Use the active region-configuration command to activate the settings of an MST (multiple spanning

tree) region.

add-member Cluster view

Use the add-member command to add a candidate device to a cluster.

address-check VLAN interface view

Use the address-check enable command to enable the address checking function of the DHCP relay

agent.

Use the address-check disable command to disable the address checking function of the DHCP relay

agent.

address-check dhcp-relay VLAN interface view

Use the address-check dhcp-relay enable command to validate the dynamic entries generated by the

DHCP relay agent.

Use the address-check dhcp-relay disable command to invalidate the dynamic entries generated by

the DHCP relay agent.

address-check field enable VLAN interface view

Use the address-check field enable command to enable checking of the specified field.

Use the address-check field disable command to disable checking of the specified field.

address-check no-matched VLAN interface view

Use the address-check no-matched enable command to forbid freely-connected clients to pass DHCP

security check.

Use the address-check no-matched disable command to allow freely-connected clients to pass DHCP

security check.

aggregate BGP view/BGP multicast address family view

Use the aggregate command to establish an aggregated record in the BGP routing table.

Use the undo aggregate command to disable the function.

am user-bind System view/Ethernet port view

Use the am user-bind command to bind the MAC and IP addresses of a user with a specified port.

Use the undo am user-bind command to cancel the binding.

apply as-path Route policy view

Use the apply as-path command to add AS number before original AS path in Router-policy.

Use the undo apply as-path command to remove the added AS number.

apply community Route policy view

Use the apply community command to set BGP community attributes in Route-policy.

Use the undo apply community command to cancel the BGP community attribute setting .

apply cost Route policy view

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 apply cost-type 1149

Quick Reference Guide

apply cost-type Route policy view

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 Route policy view

Use the apply ip next-hop command to set the IP address of next hop.

Use the undo apply ip next-hop command to cancel the setting argument.

apply isis Route-policy view

Use the apply isis command to define an apply clause to import routing information into the IS-IS area(s) at

specified level(s).

apply local-preference Route policy view

Use the apply local-preference command to set local preference for routing information.

Use the undo apply local-preference command to cancel the apply statement setting.

apply origin Route policy view

Use the apply origin command to set BGP routing information source.

Use the undo apply origin command to cancel the apply statement setting.

apply poe-profile System view and Ethernet port view

Use the apply poe-profile command to apply the existing PoE profile configuration to the specified Ethernet

port.

Use the undo apply poe-profile command to cancel the PoE profile configuration for the specified Ethernet

port.

apply tag Route policy view

Use the apply tag command to configure to set the tag area of RIP or OSPF route information.

Use the undo apply tag command to cancel the apply statement.

area OSPF view

Use the area command to enter OSPF area view.

Use the undo area command to cancel the specified area.

area-authentication-mode IS-IS view

Use the area-authentication-mode command to configure IS-IS to authenticate the packets (LSP, CSNP

and PSNP) received from level-1 route using the predefined mode and password.

Use the undo area-authentication-mode command to disable IS-IS from authenticating the received

packets above.

arp check enable System view

Use the arp check enable command to enable the ARP entry checking function.

Use the undo arp check enable command to disable the ARP entry checking function.

arp gratuitous-updating enable System view

Use the arp gratuitous-updating enable command to enable gratuitous ARP packets to be sent

periodically.

Use the undo arp gratuitous-updating enable command to disable gratuitous ARP packets from

being sent periodically. With this function enabled, the switch periodically broadcasts gratuitous ARP packets

from the current interface IP address within the VLAN whose interfaces are configured with an IP address.

arp mac-arp-map limit System view

Use the arp mac-arp-map limit command to set the maximum number of IP addresses to be bound to a

MAC address of a VLAN.

Use the undo arp mac-arp-map limit command to restore the default value.

arp max-dynamic-entry Port view

Use the arp max-dynamic-entry command to set the maximum number of dynamic ARP entries that can

be learnt by a port.

Use the undo arp max-dynamic-entry command to restore the default setting.

1150 arp max-entry 3Com Switch 7750 Family

Quick Reference Guide

arp max-entry System view

Use the arp max-entry command to set the total maximum number of ARP entries.

Use the undo arp max-entry command to restore the default setting.

arp protective-down recover interval System view

Use the arp protective-down recover interval command to specify a recovery interval. A port is

brought up after the interval (since it was disabled).

Use the undo arp protective-down recover interval command to restore the default.

arp proxy enable VLAN interface view

Use the arp proxy enable command to enable proxy ARP.

Use the undo arp proxy enable command to disable proxy ARP.

arp proxy source-vlan enable VLAN interface view

Use the arp proxy source-vlan enable command to enable intra-VLAN proxy ARP, so that proxy ARP is

able to process intra-VLAN ARP requests to provide Layer 3 connectivity between Layer 2 isolated ports in the

same VLAN.

Use the undo arp proxy source-vlan enable command to disable intra-VLAN proxy ARP, so that proxy

ARP only processes inter-VLAN ARP requests instead of intra-VLAN ARP request.

arp rate-limit System view

Use the arp rate-limit command to specify the maximum ARP packet receive rate on ports.

Use the undo arp rate-limit command to restore the default.

arp rate-limit enable System view

Use the arp rate-limit enable command to enable the ARP packet rate limit function.

Use the undo arp rate-limit enable command to disable the ARP packet rate limit function.

arp rate-limit trust Ethernet port view

Use the arp rate-limit trust command to configure the port as a trusted port for ARP packet rate limit.

Use the undo arp rate-limit trust command to configure the port as an untrusted port for ARP packet

rate limit.

arp relay enable System view

Use the arp relay enable command to enable ARP forwarding in the protocol-based VLAN(s).

Use the undo arp relay command to disable ARP forwarding in the protocol-based VLAN(s).

arp source-suppression limit System view

Use the arp source-suppression limit command to set the maximum number of a type of ARP packets

that can be sent to the CPU in a unit of time.

Use the undo arp source-suppression limit command to restore the default setting.

arp static System view

Use the arp static command to create a static ARP entry in the ARP table.

Use the undo arp command to remove an ARP entry.

arp timer aging System view

Use the arp timer aging command to configure the aging time for dynamic ARP entries.

Use the undo arp timer aging command to restore the default aging time.

arp timer gratuitous-updating System view

Use the arp timer gratuitous-updating command to set a gratuitous ARP update interval.

Use the undo arp timer gratuitous-updating command to restore the default gratuitous ARP update

interval.

asbr-summary OSPF view

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 ascii 1151

Quick Reference Guide

ascii FTP client view

Use the ascii command to specify that files be transferred in the ASCII mode.

attack-protection System view

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.

Use the undo attack-protection command to cancel the global Telnet protection.

Use the attack-protection ip-address command to set special ARP Telnet protection. If the Layer-3 interface

corresponding to the specified IP address is in the UP state, Telnet protection is enabled on this Layer-3 interface.

If the corresponding Layer-3 interface does not exist or is in the Down state, the system saves this configuration

as the special ARP settings and enables Telnet protection when the corresponding Layer-3 interface is in the UP

state.

Use the undo attack-protection ip-address command to cancel the special ARP Telnet protection.

attack-protection disable-defaultroute System view

Use the attack-protection disable-defaultroute command to disable the default-route Telnet

protection function.

Use the undo attack-protection disable-defaultroute command to enable the default-route Telnet

protection function.

attack-protection icmp System view

Use the attack-protection icmp command to enable ICMP protection.

Use the undo attack-protection icmp command to disable ICMP protection.

attack-protection snmp System view

Use the attack-protection snmp command to enable SNMP protection.

Use the undo attack-protection snmp command to disable SNMP protection.

attack-protection telnet System view

Use the attack-protection telnet command to enable Telnet protection.

Use the undo attack-protection telnet command to disable Telnet protection.

attribute Local user view

Use the attribute command to set the attributes of a local user.

Use the undo attribute command to cancel attribute settings of the local user.

authentication ISP domain view

Use the authentication command to configure an authentication scheme for current ISP domain.

Use the undo authentication command to restore the default authentication scheme of current domain.

authentication-mode User interface view

Use the authentication-mode command to specify the authentication mode.

authentication-mode OSPF Area view

Use the authentication-mode command to configure one area of OSPF to support the authentication

attribute.

Use the undo authentication-mode command to cancel the authentication attribute of this area.

authorization ISP domain view

Use the authorization command to configure the authorization scheme of the current ISP domain.

Use the undo authorization command to restore the default authorization scheme of the ISP domain.

auto-build Cluster view

Use the auto-build command to add the candidate device to the cluster automatically to be a member device.

auto-execute command User interface view

Use the auto-execute command command to set the command that is executed automatically after a user

logs in.

Use the undo auto-execute command command to disable the specified command from being

automatically executed.

1152 balance 3Com Switch 7750 Family

Quick Reference Guide

balance BGP view

Use the balance command to configure BGP load balance.

Use the undo balance command to cancel the load balance configuration.

bgp System view

Use the bgp command to enable BGP and enter the BGP view.

Use the undo bgp command to disable BGP.

bims boot request System view

Use the bims boot request command to enable the BIMS device to access the branch intelligent

management system (BIMS) center at startup.

Use the undo bims boot request command to disable the BIMS device to access the BIMS center

automatically at startup.

bims device-id System view

Use the bims device-id command to configure the unique identifier of the BIMS device at the BIMS center.

Use the undo bims device-id command to delete the identifier.

bims enable System view

Use the bims enable command to enable BIMS.

Use the undo bims enable command to disable BIMS.

bims interval System view

Use the bims interval command to configure the interval for accessing the BIMS center. When the interval

is set to 0, the BIMS device does not access the BIMS center regularly.

Use the undo bims interval command to delete the interval specified for accessing the BIMS center.

bims ip address System view

Use the bims ip address command to configure the IP address and port number of the BIMS center.

Use the undo bims ip address command to delete the configuration.

bims request System view

Use the bims request command to have the BIMS device access the BIMS center.

bims sharekey System view

Use the bims sharekey command to configure the shared key between the BIMS device and the BIMS

center.

Use the undo bims sharekey command to delete the shared key.

bims source ip-address System view

Use the bims source ip-address command to configure a source IP address for the packets sent by the

BIMS device. It can be the IP address of a port on the device.

Use the undo bims source ip-address command to delete the source IP address configured for the BIMS

device.

bims specify-time System view

Use the bims specify-time command to configure the BIMS device to access the BIMS center at the

specified time and if desired, configure the device to access the BIMS center at regular intervals from then on

during a specified period.

Use the undo bims specify-time command to delete the setting.

binary FTP client view

Use the binary command to specify that files be transferred in the binary mode.

boot boot-loader User view

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 User view

Use the boot boot-loader primary command to specify the primary startup file at next booting.

3Com Switch 7750 Family boot bootrom 1153

Quick Reference Guide

boot bootrom User view

Use the boot bootrom command to update the Boot ROM.

boot bootrom default User view

Use the boot bootrom default command to use the current startup file to upgrade the Boot ROMs.

boot bootrom default User view

Use the boot bootrom default command to upgrade the Boot ROM by using the current boot file.

boot bootrom file-url User view

Use the boot bootrom file-url command to use the specified App file to upgrade the Boot ROMs.

bootrom-update security-check enable System view

Use the bootrom-update security-check enable command to enable the validity check function when

upgrading Boot ROM.

Use the undo bootrom-update security-check enable command to disable the validity check

function when upgrading Boot ROM.

bridgemactocpu System view

Use the bridgemactocpu command to set whether the packets with destination MAC address as the bridge

MAC address of the switch will be passed to the CPU for processing.

broadcast-suppression VLAN view

Use the broadcast-suppression command to suppress broadcast traffic through a VLAN.

Use the undo broadcast-suppression command to reset the allowed broadcast traffic through a VLAN

to the default value.

broadcast-suppression Ethernet port view

Use the broadcast-suppression command to limit broadcast traffic allowed to be received on each port

(in system view) or on a specified port (in Ethernet port view).

Use the undo broadcast-suppression command to restore the default broadcast suppression setting.

bsr-policy PIM view

Use the bsr-policy command to limit the range of legal BSRs to prevent BSR proofing.

Use the undo bsr-policy command to restore the default setting, that is, no range limit is set and all received

messages are taken as legal.

build Cluster view

Use the build command to configure or modify the cluster name.

Use the undo build command to remove a cluster.

bye FTP client view

Use the bye command to terminate the control connection and data connection with the remote FTP server

and quit to user view.

bye SFTP Client view

Use the bye command to terminate the connection to the remote SFTP server and return to system view.

cache-sa-enable MSDP view

Use the cache-sa-enable command to enable the SA message cache mechanism.

Use the undo cache-sa-enable command to disable the cache mechanism.

c-bsr PIM view

Use the c-bsr command to configure a candidate BSR.

Use the undo c-bsr command to remove the candidate BSR configured.

cd User view

Use the cd command to change the current directory or switch to the directory of a specified storage device.

1154 cd 3Com Switch 7750 Family

Quick Reference Guide

cd FTP client view

Use the cd command to change the work directory on the remote FTP server.

cd SFTP Client view

Use the cd command to change the current path on the remote SFTP server. If you did not specify the

remote-path argument, the current path is displayed.

cdup FTP client view

Use the cdup command to go to the parent directory of the current directory.

cdup SFTP Client view

Use the cdup command to return the current path on the remote SFTP server to the upper directory.

check region-configuration MST region view

Use the check region-configuration command to display the current MST region configuration,

including region name, revision level, and VLAN mapping table.

checkzero RIP view

Use the checkzero command to enable zero field check of RIP-1 packets.

Use the undo checkzero command to disable zero field check.

clock datetime User view

Use the clock datetime command to set the current date and time of the Ethernet switch.

clock summer-time User view

Use the clock summer-time command to set the name and time range of the summer time.

Use the undo clock summer-time to cancel the settings.

clock timezone User view

Use the clock timezone command to set the local time zone.

Use the undo clock timezone command to restore the local time zone to the default UTC (universal time

coordinated) time zone.

close FTP client view

Use the close command to terminate an FTP connection without quitting FTP client view.

cluster System view

Use the cluster command to enter cluster view.

cluster enable System view

Use the cluster enable command to enable the cluster function on a switch.

Use the undo cluster enable command to disable the cluster function on a switch.

cluster switch-to User view

Use the cluster switch-to command to switch between the management device and member devices for

configuration and management.

cluster-mac Cluster view

Use the cluster-mac command to configure a multicast MAC address for the cluster.

Use the undo cluster-mac command to restore the default multicast MAC address.

cluster-mac syn-interval Cluster view

Use the cluster-mac syn-interval command to set the interval for the management device to send Switch

Clustering V2 multicast MAC synchronization packets periodically. You can only use this command on a

management device.

command-privilege level System view

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 compare-different-as-med 1155

Quick Reference Guide

compare-different-as-med BGP view/BGP multicast address family view

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 BGP view

Use the confederation id command to configure confederation identifier.

Use the undo confederation id command to cancel the BGP confederation specified by the as-number

argument.

confederation nonstandard BGP view.

Use the confederation { nonstandard | standard1965 | standard3065 } command to configure the standard

type of confederation.

Use the undo confederation { nonstandard | standard1965 | standard3065 } command to cancel the

configuration.

confederation peer-as BGP view

Use the confederation peer-as command to configure a confederation consisting of which Sub-ASs.

Use the undo confederation peer-as command to delete the specified Sub-AS in the confederation.

control-vlan RRPP domain view

Use the control-vlan command to specify the control VLAN for the RRPP domain.

copy User view

Use the copy command to copy a file to a specified path with specified name.

copy configuration System view

Use the copy configuration command to copy the configuration on a port to some other ports to keep

consistent configuration on them.

copyright-info enable System view

Use the copyright-info enable command to enable copyright information displaying.

Use the undo copyright-info enable command to disable copyright information displaying.

cost-style IS-IS view

Use the cost-style command to set the cost style of packets received or sent by IS-IS router.

Use the undo cost-style command to restore the default cost style.

count NQA test group view

Use the count command to configure the number of packets to be sent for each test.

Use the undo count command to restore the default value.

cpu-usage-threshold System view

Use the cpu-usage-threshold command to enable CPU usage threshold configuration.

Use the undo cpu-usage-threshold command to disable this function.

c-rp PIM view

Use the c-rp command to configure the router to advertise itself as a candidate RP.

Use the undo c-rp command to remove the configuration.

crp-policy PIM view

Use the crp-policy command to limit the range of legal C-RP, as well as target service group range of each

C-RP, prevent C-RP proofing.

Use the undo crp-policy command to restore the default setting, that is, no range limit is set and all received

messages are taken as legal.

cut connection System view

Use the cut connection command to cut down one user connection or one type of user connections forcibly.

1156 dampening 3Com Switch 7750 Family

Quick Reference Guide

dampening BGP view

Use the dampening command to make BGP route attenuation valid or modify various BGP route attenuation

parameters.

Use the undo dampening command to make the characteristics invalid.

databits User interface view

Use the databits command to set the databits for the user interface.

Use the undo databits command to revert to the default data bits.

data-flow-format RADIUS scheme view

Use the data-flow-format command to set the units of measure for data flows sent to RADIUS servers.

Use the undo data-flow-format command to restore the default units of measure.

data-flow-format HWTACACS view

Use the data-flow-format command to configure the unit of data flows sent to the TACACS server.

Use the undo data-flow-format command to restore the default.

debugging User view

Use the debugging command to enable system debugging.

Use the undo debugging command to disable system debugging.

default cost RIP view

Use the default cost command to set the default routing cost of imported routes.

Use the undo default cost command to restore the default value.

default cost OSPF view

Use the default cost command to configure the default cost for OSPF to import external routes.

Use the undo default cost command to restore the default routing cost of external routes to its default

value.

default interval OSPF view

Use the default interval command to configure the default interval for OSPF to import external routes.

Use the undo default interval command to restore the default value of the default interval of importing

external routes.

default limit OSPF view

Use the default limit command to configure the default limit on the number of routes imported by OSPF in

a unit time.

Use the undo default limit command to restore the default value.

default local-preference BGP view/BGP multicast address family view

Use the default local-preference command to configure the default local preference.

Use the undo default local-preference command to restore the default value.

default med BGP view/BGP multicast address family view

Use the default med command to configure the default MED value of the system.

Use the undo default med command to restore the default MED value of the system.

default tag OSPF view

Use the default tag command to configure the default tag of OSPF when it imports an external route.

Use the undo default tag command to restore the default tag of OSPF when it imports the external route.

default type OSPF view

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 default-cost 1157

Quick Reference Guide

default-cost OSPF Area view

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.

default-route-advertise OSPF view

Use the default-route-advertise command to import the default route to OSPF route area.

Use the undo default-route-advertise command to cancel the import of the default route.

default-route-advertise IS-IS view

Use the default-route-advertise command to enable the L1 and L2 routers to generate default routes.

Use the undo default-route-advertise command to disable the function.

delete User view

Use the delete command to delete a specified file on a switch.

delete FTP client view

Use the delete command to delete a specified remote file.

delete SFTP Client view

Use the delete command to delete the specified file from the remote SFTP server.

delete static-routes all System view

Use the delete static-routes all command to delete all static routes.

delete-member Cluster view

Use the delete-member command to remove a member device from the cluster.

description Isolation group view

Use the description command to specify the description string for the current isolation group.

Use the undo description command to remove the description string for the current isolation group.

description VLAN view, VLAN interface view

Use the description command to set the description string or text for the current VLAN or VLAN interface.

Use the undo description command to restore the default description string or text.

description Ethernet port view

Use the description command to set a port description string.

Use the undo description command to remove the port description string.

destination-ip NQA test group view

Use the destination-ip command to configure the destination IP address in the test.

Use the undo destination-ip command to delete the configured destination IP address.

dhcp enable System view

Use the dhcp enable command to enable DHCP.

Use the undo dhcp enable command to disable DHCP.

dhcp relay information enable System view

Use the dhcp relay information enable command to enable option 82 supporting on a DHCP relay

agent, through which you can enable the DHCP relay agent to insert option 82 into DHCP request packets sent

to a DHCP server.

Use the undo dhcp relay information enable command to disable option 82 supporting on a DHCP

relay agent, through which you can disable the DHCP relay agent from inserting option 82 into DHCP request

packets sent to a DHCP server.

1158 dhcp relay information strategy 3Com Switch 7750 Family

Quick Reference Guide

dhcp relay information strategy System view

Use the dhcp relay information strategy command to instruct a DHCP relay agent to perform specified

operations to DHCP request packets that carry option 82.

Use the undo dhcp relay information strategy command to instruct a DHCP relay agent to perform

the default operations to DHCP request packets that carry option 82.

dhcp relay reply broadcast System view

Use the dhcp relay reply broadcast command to force the DHCP relay agent to broadcast the responses

(including DHCP-OFFER, DHCP-ACK, or DHCP-ACK) to the clients.

Use the undo dhcp relay reply broadcast command to restore the default settings.

dhcp relay source-ip source-interface System view

Use the dhcp relay source-ip source-interface command to specify the source IP address of uplink

packets to the DHCP server as the IP address of the relay agent’s interface that connects to the clients.

Use the undo dhcp relay source-ip source-interface command to disable this function.

dhcp select global System view, VLAN interface view

Use the dhcp select global command to configure the specified interface(s) or all interfaces to operate in

global DHCP address pool mode. Upon receiving a DHCP packet from a DHCP client through an interface

operating in global DHCP address pool mode, the DHCP server chooses an IP address from a global DHCP

address pool of the local DHCP server and assigns the address to the DHCP client.

Use the undo dhcp select command to restore the default DHCP packet processing mode.

dhcp select interface System view, VLAN interface view

Use the dhcp select interface command to configure the specified interface(s) to operate in DHCP

interface address pool mode. Upon receiving a DHCP packet from a DHCP client through an interface operating

in interface address pool mode, the DHCP server chooses an IP address from the interface address pool of the

local DHCP server and assigns the address to the DHCP client.

Use the undo dhcp select command to restore the default DHCP packet processing mode.

dhcp server detect System view

Use the dhcp server detect command to enable the unauthorized DHCP server detecting function.

Use the undo dhcp server detect command to disable the unauthorized DHCP server detecting function.

dhcp server dns-list System view, VLAN interface view

Use the dhcp server dns-list command to configure DNS server IP address(es) for the DHCP address pool(s)

of specified interface(s).

Use the undo dhcp server dns-list command to remove the DNS server IP address(es) configured for the

DHCP address pool(s) of the specified interface(s).

dhcp server domain-name System view, VLAN interface view

Use the dhcp server domain-name command to configure a domain name for the DHCP clients whose

IP addresses are from the specified interface address pool(s).

Use the undo dhcp server domain-name command to remove the configured domain name.

dhcp server expired System view, VLAN interface view

Use the dhcp server expired command to configure the lease time of the IP addresses in the specified

interface address pool(s).

Use the undo dhcp server expired command to restore the default lease time.

dhcp server forbidden-ip System view

Use the dhcp server forbidden-ip command to forbid the specified IP addresses in a DHCP address pool

to be automatically assigned.

Use the undo dhcp server forbidden-ip command to cancel this configuration.

dhcp server ip-pool System view

Use the dhcp server ip-pool command to create a global DHCP address pool and enter DHCP address pool

view. 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 dhcp server nbns-list 1159

Quick Reference Guide

dhcp server nbns-list System view, VLAN interface view

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).

dhcp server netbios-type System view, VLAN interface view

Use the dhcp server netbios-type command to configure the NetBIOS node type of the DHCP clients

whose IP addresses are from the specified interface address pool(s).

Use the undo dhcp server netbios-type command to restore the default NetBIOS node type.

dhcp server option System view, VLAN interface view

Use the dhcp server option command to customize DHCP options for the specified DHCP interface address

pool(s).

Use the undo dhcp server option command to remove the customized DHCP options.

dhcp server ping System view

Use the dhcp server ping command to set the maximum number of the ICMP packets a DHCP server sends

in a ping test and the maximum response timeout time of each ICMP packet.

Use the undo dhcp server ping command to restore the default settings.

dhcp server static-bind VLAN interface view

Use the dhcp server static-bind command to statically bind an IP address of the current address pool to

a MAC address.

Use the undo dhcp server static-bind command to cancel an IP-MAC address binding.

dhcp-relay gateway interface VLAN interface view

Use the dhcp-relay gateway interface command to specify a gateway address by binding one or

multiple ports in the VLAN to one of the VLAN interface’s IP addresses.

Use the undo dhcp-relay gateway interface command to remove the specified binding entry.

dhcp-relay gateway vlan Ethernet port view

Use the dhcp-relay gateway vlan command to specify a gateway address by binding the Ethernet port

in a VLAN to one of the VLAN interface’s IP addresses.

Use the undo dhcp-relay gateway command to remove the specified binding entry.

dhcp-security static System view

Use the dhcp-security static command to configure a static client address entry on the DHCP relay agent,

in which an IP address can be bound to one or more objects among MAC address, VLAN, and port.

Use the undo dhcp-security command to remove one or all client address entries from the DHCP relay

agent.

dhcp-server VLAN interface view

Use the dhcp-server command to specify which DHCP server group a VLAN interface belongs to.

Use the undo dhcp-server command to cancel this mapping.

dhcp-server VLAN interface view

Use the dhcp-server command to map the current VLAN interface to a DHCP server group.

Use the undo dhcp-server command to cancel the mapping.

dhcp-server ip System view

Use the dhcp-server ip command to configure the DHCP server IP address(es) in a specified DHCP server

group.

Use the undo dhcp-server command to remove all DHCP server IP addresses in a DHCP server group.

dhcp-snooping System view

Use the dhcp-snooping command to enable the DHCP snooping function, so as to allow the switch to listen

to the DHCP broadcast packets.

Use the undo dhcp-snooping command to disable the DHCP snooping function.

1160 dhcp-snooping information enable 3Com Switch 7750 Family

Quick Reference Guide

dhcp-snooping information enable System view

Use the dhcp-snooping information enable command to enable DHCP snooping Option 82.

Use the undo dhcp-snooping information enable command to disable DHCP snooping Option 82.

dhcp-snooping information format System view

Use the dhcp-snooping information format command to configure the storage format of Option 82

as HEX or ASCII.

dhcp-snooping information packet-format System view

Use the dhcp-snooping information packet-format command to configure the padding format for

Option 82 as the extended or standard one.

dhcp-snooping information remote-id System view

Use the dhcp-snooping information circuit-id command to configure the remote ID sub-option in

Option 82.

Use the undo dhcp-snooping information circuit-id command to restore the default value of the

remote ID sub-option in Option 82.

dhcp-snooping information strategy System view, Ethernet port view

Use the dhcp-snooping information strategy command in system view to configure a handling policy

for DHCP requests that contain Option 82 sent by the DHCP client.

Use the undo dhcp-snooping information strategy command to restore the default handling policy.

Use the dhcp-snooping information strategy command in Ethernet port view to configure a handling

policy for requests that contain Option 82 received on the current port.

Use the undo dhcp-snooping information strategy command to restore the default handling policy.

dhcp-snooping information vlan remote-id Ethernet port view

Use the dhcp-snooping information vlan remote-id command to configure the content of the

remote ID in Option 82

Use the undo dhcp-snooping information remote-id command to restore the default remote ID in

Option 82.

dhcp-snooping trust Ethernet port view

Use the dhcp-snooping trust command to specify an Ethernet port as a trusted port.

Use the undo dhcp-snooping trust command to restore an Ethernet port to an untrusted port.

dir User view

Use the dir command to display the information about the specified files or directories in the storage devices

on a switch.

dir FTP client view

Use the dir command to query specified files on a remote FTP server, or to display file information in the current

directory. The output information, which includes the name, size and creation time of files, will be saved in a

local file.

dir SFTP Client view

Use the dir command to display the specified directory on the remote SFTP server.

disconnect FTP client view

Use the disconnect command to terminate a FTP connection without quitting FTP client view.

display acl config Any view

display acl config statistics Any view

display acl mode Any view

Use the display acl mode command to view the ACL running mode chosen by the switch for filtering the

traffic.

display acl order Any view

Use the display acl order command to display the match order of the ACL rules sent to a port.

3Com Switch 7750 Family display acl remaining entry 1161

Quick Reference Guide

display acl remaining entry Any view

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.

display acl running-packet-filter Any view

Use the display acl running -packet-filter command to view the information of the activated ACL. The

displayed content includes the interface on which ACL is activated, the activation direction, ACL name, ACL rule

number and activation status.

display am user-bind Any view

Use the display am user-bind command to display port binding information.

display arp | Any view

Use the display arp | command to display the ARP entries matching a specified rule.

display arp Any view

Use the display arp command to display ARP entries.

display arp attack-list Any view

Use the display arp attack-list command to display the ARP attack information, including the attacking

MAC address, IP address and the attack time.

display arp entry-limit Any view

Use the display arp entry-limit command to display the number limits of ARP entries.

display arp interface Any view

Use the display arp interface command to display the ARP entries of a specified port.

display arp proxy Any view

Use the display arp proxy command to display the status of proxy ARP (enabled/disabled).

display arp rate-limit System view

Use the display arp rate-limit command to display ARP packet rate limit configuration information.

display arp slot Any view

Use the display arp slot command to display the ARP entries of all ports on the specified slot.

display arp source-suppression Any view

Use the display arp source-suppression command to display the ARP source suppression configuration

on the current switch.

display arp timer aging Any view

Use the display arp timer aging command to display the setting for ARP aging timer.

display arp vlan Any view

Use the display arp vlan command to display the ARP entries of all ports in a specified VLAN.

display bgp group Any view

Use the display bgp group command to view the information of peer groups.

display bgp network Any view

Use the display bgp network command to view the routing information that has been configured.

display bgp paths Any view

Use the display bgp paths command to view the information about AS paths

display bgp peer Any view

Use the display bgp peer command to display the information about the specified BGP peer.

1162 display bgp routing-table 3Com Switch 7750 Family

Quick Reference Guide

display bgp routing-table Any view

Use the display bgp routing-table command to display all the BGP routing information.

display bgp routing-table as-path-acl Any view

Use the display bgp routing-table as-path-acl command to view routes that match an as-path acl.

display bgp routing-table cidr Any view

Use the display bgp routing-table cidr command to view the routing information about the

non-natural mask (namely the classless inter-domain routing, CIDR).

display bgp routing-table community Any view

Use the display bgp routing-table community command to view the routing information related to

the specified BGP community number in the routing table.

display bgp routing-table community-list Any view

Use the display bgp routing-table community-list command to view the routing information

matching the specified BGP community list.

display bgp routing-table dampened Any view

Use the display bgp routing-table dampened command to display BGP dampened routes.

display bgp routing-table different-origin-as Any view

Use the display bgp routing-table different-origin-as command to display routes that have

different source autonomous systems.

display bgp routing-table flap-info Any view

Use the display bgp routing-table flap-info command to display BGP flap-info.

display bgp routing-table peer Any view

Use the display bgp routing-table peer command to view the routing information the specified BGP

peer advertised or received.

display bgp routing-table regular-expression Any view

Use the display bgp routing-table regular-expression command to view the routing information

matching the specified AS regular expression

display bgp routing-table statistic Any view

Use the display bgp routing-table statistic command to view the statistics of BGP routing

information.

display boot-loader Any view

Use the display boot-loader command to display the APP file that is adopted when the switch boots this

time and next time.

display brief interface Any view

Use the display brief interface command to display the brief configuration information about one or all

interfaces, including: interface type, link state, link rate, duplex mode, link type, default VLAN ID and port

description string (only the first 33 characters are displayed).

display channel Any view

Use the display channel command to display the settings of an information channel.

display clock Any view

Use the display clock command to display the current date and time of the system, so that you can adjust

them if they are wrong.

display cluster candidates Any view

Use the display cluster candidates command to display the information about the candidate devices of

a cluster.

display cluster members Any view

Use the display cluster members command to display the information about cluster members.

3Com Switch 7750 Family display connection 1163

Quick Reference Guide

display connection Any view

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 Any view

Use the display cpu command to display the CPU usage of a specified switch.

display current-configuration Any view

Use the display current-configuration command to display the currently effective configuration

parameters of the switch.

display debugging Any view

Use the display debugging command to display enabled debugging.

display device Any view

Use the display device command to display the information, such as the module type and operating status,

about each module (main module and sub module) of a specified switch.

display dhcp server conflict Any view

Use the display dhcp server conflict command to display the statistics of IP address conflicts on the

DHCP server.

display dhcp server expired Any view

Use the display dhcp server expired command to display the lease expiration information about an IP

address, or the lease expiration information about all IP addresses in one or all DHCP address pools. When all

the IP addresses in an address pool are assigned, the DHCP server assigns the IP addresses that are expired to

DHCP clients.

display dhcp server free-ip Any view

Use the display dhcp server free-ip command to display the free (that is, unassigned) IP addresses.

display dhcp server ip-in-use Any view

Use the display dhcp server ip-in-use command to display the address binding information of an IP

address, the specified DHCP address pool(s) or all DHCP address pools.

display dhcp server statistics Any view

Use the display dhcp server statistics command to display the statistics on a DHCP server.

display dhcp server tree Any view

Use the display dhcp server tree command to display information about address pool tree.

display dhcp-security Any view

Use the display dhcp-security command to display one or all user address entries, or a specified type of

user address entries in the valid user address table of a DHCP server group.

display dhcp-server Any view

Use the display dhcp-server command to display information about a specified DHCP server group.

display dhcp-server interface Any view

Use the display dhcp-server interface command to display information about the DHCP server group

to which a VLAN interface is mapped.

display dhcp-snooping Any view

Use the display dhcp-snooping command to display the IP-MAC mapping relations recorded by the DHCP

snooping-enabled switch.

display dhcp-snooping count Any view

Use the display dhcp-snooping count command to display the total number of DHCP-Snooping entries.

display dhcp-snooping trust Any view

Use the display dhcp-snooping trust command to display the (enabled/disabled) state of the DHCP

snooping function and the trusted ports.

1164 display dhcp-snooping vlan 3Com Switch 7750 Family

Quick Reference Guide

display dhcp-snooping vlan Any view

Use the display dhcp-snooping vlan command to display the IP-MAC mapping relations recorded by the

DHCP-Snooping-enabled switch in the specified VLAN.

display diagnostic-information Any view

Use the display diagnostic-information command to display operation information about all or

specified functional modules.

display dldp Any view

Use the display dldp command to display the DLDP configuration information of the device or the specified

port.

display dns domain Any view

Use the display dns domain command to display the information in the DNS suffix list.

display dns dynamic-host Any view

Use the display dns dynamic-host command to display information about the dynamic DNS cache.

display dns server Any view

Use the display dns server command to display the DNS server information.

display domain Any view

Use the display domain command to display the configuration information about one specific or all ISP

domains.

display dot1x Any view

Use the display dot1x command to display 802.1x-related information, such as configuration information,

operation information (session information), and statistics.

display environment Any view

Use the display environment command to display the environment information.

display fan Any view

Use the display fan command to view the working state of the built-in fans.

display fib Any view

Use the display fib command to view the summary of the forwarding information base (FIB). Each line

indicates an FIB entry. The information includes: destination address/mask length, next hop, current flag,

timestamp, and output interface. For the ACL configuration, refer to “ACL Commands” on page 755.

display ftp-server Any view

Use the display ftp-server command to display the FTP server-related settings of a switch when it operates

as an FTP server.

display ftp-user Any view

Use the display ftp-user command to display the settings of the current FTP user, including the user name,

host IP address, port number, connection idle time, and work directory.

display garp statistics Any view

Use the display garp statistics command to display the GARP statistics of specified ports or all ports.

display garp timer Any view

Use the display garp timer command to display the settings of the GARP timers on specified ports or all

ports.

display gmrp statistics Any view

Use the display gmrp statistics command to view the statistics information about GMRP.

display gmrp status Any view

Use the display gmrp status command to view the status of global GMRP.

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