Monitoring And Maintaining The Interfaces; Monitoring Interface And Controller Status - Cisco Catalyst 2950 Software Configuration Manual

Monitoring and Maintaining the Interfaces

The down-when-looped interface command is not supported on the Catalyst 2950G switches.
Note
Monitoring and Maintaining the Interfaces
You can perform the tasks in these sections to monitor and maintain interfaces:
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Monitoring Interface and Controller Status

Commands entered at the privileged EXEC prompt display information about the interface, including
the version of the software and the hardware, the controller status, and statistics about the interfaces.
Table 10-2
commands by using the show ? command at the privileged EXEC prompt.) These commands are fully
described in the Cisco IOS Interface Command Reference for Cisco IOS Release 12.1.
Table 10-2 show Commands for Interfaces
Command
show interfaces [interface-id]
show interfaces [interface-id] capabilities [module
{module-number}]
show interfaces interface-id status [err-disabled]
show interfaces [interface-id] switchport
show interfaces [interface-id] description
show ip interface [interface-id]
show interfaces transceiver properties
show running-config interface [interface-id]
show version
For examples of the output from these commands, see the command reference for this release and the
Cisco IOS Interface Command Reference for Cisco IOS Release 12.1.
If you enter the show interfaces interfaces-id privileged EXEC command on a LRE switch interface,
the command output shows the statistics for the LRE interface. It does not show the statistics for the
10/100 Ethernet ports on the attached CPE device. The output also shows that the speed and duplex
Catalyst 2950 and Catalyst 2955 Switch Software Configuration Guide
10-16
Monitoring Interface and Controller Status, page 10-16
Clearing and Resetting Interfaces and Counters, page 10-17
Shutting Down and Restarting the Interface, page 10-17
lists some of these interface monitoring commands. (You can display the full list of show
Purpose
Display the status and configuration of all interfaces or a specific
interface.
Display the capabilities of an interface. The module number is always
0. If you enter an interface ID, the module keyword is not visible.
Display interface status or a list of interfaces in error-disabled state.
Display administrative and operational status of switching
(nonrouting) ports.
Display the description configured on an interface or all interfaces and
the interface status.
Display the usability status of all interfaces configured for IP or the
specified interface.
(Optional) Display speed and duplex settings on the interface.
Display the running configuration in RAM for the interface.
Display the hardware configuration, software version, the names and
sources of configuration files, and the boot images.
Chapter 10 Configuring Interface Characteristics
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