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Catalyst 3750 Switch Software Configuration Guide
78-16180-02
Chapter 11 Configuring Interface Characteristics
Monitoring and Maintaining the Interfaces
This example shows the response when you try to set Gigabit Ethernet interfaces to an out-of-range
number:
Switch(config)# system mtu jumbo 2500
^
% Invalid input detected at '^' marker.
Monitoring and Maintaining the Interfaces
You can perform the tasks in these sections to monitor and maintain interfaces:
• Monitoring Interface Status, page 11-24
• Clearing and Resetting Interfaces and Counters, page 11-25
• Shutting Down and Restarting the Interface, page 11-25
Monitoring Interface Status
Commands entered at the privileged EXEC prompt display information about the interface, including
the versions of the software and the hardware, the configuration, and statistics about the interfaces.
Table 11-3 lists some of these interface monitoring commands. (You can display the full list of show
commands by using the show ? command at the privileged EXEC prompt.) These commands are fully
described in the Cisco IOS Interface Command Reference, Release 12.2.
Table 11-3 Show Commands for Interfaces
Command Purpose
show interfaces [interface-id] Display the status and configuration of all interfaces or a specific
interface.
show interfaces interface-id status [err-disabled] Display interface status or a list of interfaces in an error-disabled state.
show interfaces [interface-id] switchport Display administrative and operational status of switching
(nonrouting) ports. You can use this command to find out if a port is in
routing or switching mode.
show interfaces [interface-id] description Display the description configured on an interface or all interfaces and
the interface status.
show ip interface [interface-id] Display the usability status of all interfaces configured for IP routing
or the specified interface.
show interface [interface-id] stats Display the input and output packets by the switching path for the
interface.
show interfaces [interface-id] [{transceiver
calibration | properties | detail}] module number]
Display physical and operational status about an SFP module.
show running-config interface [interface-id] Display the running configuration in RAM for the interface.
show version Display the hardware configuration, software version, the names and
sources of configuration files, and the boot images.
show controllers ethernet-controller interface-id
phy
Verify the operational state of the Auto-MDIX feature on the interface.
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