CISCO交换机命令全集加说明

Table of Contents

Command Descriptions

address-violation

autobaud

back-pressure

banner motd

bridge (forwarding-time)

bridge-group

bridge-group (allow-overlap)

bridge-group (enable)

bridge (hello-time)

bridge (max-age)

bridge (priority)

cdp (advertise-v2)

cdp (enable)

cdp (holdtime)

cdp (timer)

cgmp

cgmp (hold-time)

cgmp (leave-processing)

cgmp (remove)

cgmp (reserved)

clear (cgmp)

clear (dns-cache)

clear (counters)

clear (mac-address-table)

clear (uplink-fast statistics)

clear (vtp statistics)

cluster

configure

copy (nvram tFTP)

copy (tftp)

copy (xmodem)

databits

delete (nvram)

delete (vtp)

description

disable

duplex

ecc

enable

enable (passWord)

enable (secret)

enable (use-tacacs)

end

exit

fddi (authorization)

fddi (auth-string)

fddi (notify-timer)

fddi (novell-snap-translation)

fddi (unmatched-snap-translation)

hostname

interface

ip (address)

ip (default-gateway)

ip (domain-name)

ip (http port)

ip (http server)

ip (mgmt-vlan)

ip (name-server)

line console

login (tacacs)

mac-address-table (aging-time)

mac-address-table (permanent)

mac-address-table (restricted static)

menu

modem (dialin)

modem (init-string)

monitor-port

monitor-port (monitored)

monitor-port (port)

multicast-store-and-forward

network-port

pagp-port-priority

parity

password-thresh

ping

port (block)

port-channel (mode)

port-channel (preserve-order)

port-channel (template-port)

port secure

port secure (clear)

reload

reload (in)

rip

service (config)

session

show (bridge-group)

show cdp (interface)

show cdp (neighbors)

show (cgmp)

show cluster

show (history)

show (interfaces)

Command Descriptions

This chapter is a command-by-command description of the firmware version 9.00 CLI commands for the Catalyst 1900 series and Catalyst 2820 series switches.

address-violation

Use the address-violation global configuration command to specify the action for a port address violation. Use the no address-violation command to set the switch to its default value (suspend).

address-violation {suspend disable ignore}

no address-violation

Syntax Description

suspend Suspend port on address violation. A suspended port is temporarily disabled until a certain number of frames with the proper address is received.

disable Disable port on address violation.

ignore Ignore address violation.

Default

The port is suspended on address violation.

Command Mode

Global configuration

Usage Guidelines

An address violation occurs when a secured port receives a source address that has been assigned to another secured port or when a port tries to learn an address that exceeds the address-table size limit.

Example

This command causes the switch to disable the port on address violation.

hostname(config)# address-violation disable

Related Commands

port secure

show (port system)

autobaud

Use the autobaud line-configuration command to enable remote baud-rate matching. Use the no autobaud command to disable remote baud-rate matching.

autobaud

no autobaud

Syntax Description

This command has no arguments or keywords.

Default

Remote baud-rate matching is enabled.

Command Mode

Line configuration

Example

This example shows how to enable remote baud-rate matching.

hostname(config-line)# autobaud

Related Commands

databits

line console

modem (dialin)

parity

show (line)

show (terminal)

speed

stopbits

terminal

back-pressure

Use the back-pressure global configuration command to enable back pressure. Use the no back-pressure command to disable back pressure.

back-pressure

no back-pressure

Syntax Description

This command has no arguments or keywords.

Default

Back pressure is disabled.

Command Mode

Global configuration

Usage Guidelines

When the back-pressure command is enabled, the switch forces a collision when there is no buffer to receive frames. This collision causes the transmitter to retransmit dropped frames immediately, increasing performance. The command is valid only for a 10BaseT port operating in half-duplex mode.

Example

This example shows how to enable back pressure.

hostname(config)# back-pressure

Related Commands

configure

duplex

show (interfaces)

show (port system)

banner motd

Use the banner motd global configuration command to set the message-of-the-day (MOTD) banner. Use the no banner motd command to remove the banner.

banner [motd] d message d

no banner [motd]

Syntax

motd Optional command acronym for "message of the day."

d Delimiting character---a pound sign (#), for example. Do not use the delimiting character in the banner message.

message Message text up to 400 characters or 20 lines.

Default

No MOTD is set.

Command Mode

Global configuration

Usage Guidelines

When configuring a multiline banner, the multiline help prompt displays after you enter the first line of the banner:

Enter TEXT message. End with the character c

where c is the delimiting character you choose.

When a MOTD banner is set, it displays at the login screen to the serial port console and all telnet connections (except the rcommand connections from a command switch). The maximum size of the banner is 400 characters or 20 lines, whichever is reached first.

Examples

This example sets the MOTD banner to Empowering the Internet Generation.

hostname(config)# banner motd # Empowering the Internet Generation #

This example shows how to set the MOTD banner message with line feeds.

hostname(config)# banner #

Enter TEXT message. End with the character #.

Line 1 is now up.

Line 2 is still down.

#

This example shows how to remove the MOTD banner.

hostname(config)# no banner motd

Related Commands

None

bridge (forwarding-time)

Use the bridge forwarding-time global configuration command to set the Spanning-Tree Protocol (STP) forward-delay time for a particular bridge group. Use the no bridge forwarding-time command to reset the forward-delay time to its default value.

bridge bridge-group forwarding-time time

no bridge bridge-group forwarding-time

Syntax Description

bridge-group Number from 1 to 4.

time Number from 4 to 30 seconds.

Default

The default is 15 seconds.

Command Mode

Global configuration

Usage Guidelines

This command is available only when bridge groups are enabled.

Example

The following example shows how to set the forward-delay time to 10 seconds for bridge-group 1.

hostname(config)# bridge 1 forwarding-time 10

Related Commands

bridge (hello-time)

bridge (max-age)

bridge (priority)

bridge-group (allow-overlap)

bridge-group (enable)

show (bridge-group)

show (spantree)

spantree

bridge-group

Use the bridge-group interface configuration command to modify the assignments of ports to bridge groups. Use the no bridge-group command to remove ports from a bridge group.

bridge-group bridge-group

no bridge-group bridge-group

Syntax Description

bridge-group Number from 1 to 4.