Shutting Down And Restarting An Interface - Cisco Catalyst 4500 Series Software Configuration Manual

Command
Switch# clear counters {type slot/interface}
This example shows how to clear and reset the counters on Fast Ethernet interface 5/5:
Switch# clear counters fastethernet 5/5
Clear "show interface" counters on this interface [confirm] y
Switch#
*Sep 30 08:42:55: %CLEAR-5-COUNTERS: Clear counter on interface FastEthernet5/5
by vty1 (171.69.115.10)
Switch#
The clear counters command (without any arguments) clears all the current interface counters from all interfaces.
Note The clear counters command does not clear counters retrieved with SNMP; it clears only those counters
displayed with the EXEC show interfaces command.

Shutting Down and Restarting an Interface

You can disable an interface, which disables all functions on the specified interface and marks the interface as unavailable on
all monitoring command displays. This information is communicated to other network servers through all dynamic routing
protocols. The interface is not mentioned in any routing updates.
To shut down an interface and then restart it, perform this task:
Command
Step 1
Switch(config)# interface {vlan vlan_ID} |
{{fastethernet | gigabitethernet |
tengigabitethernet} slot/port} | {port-channel
port_channel_number}
Step 2
Switch(config-if)# shutdown
Step 3
Switch(config-if)# no shutdown
This example shows how to shut down Fast Ethernet interface 5/5:
Switch(config)# interface fastethernet 5/5
Switch(config-if)# shutdown
Switch(config-if)#
*Sep 30 08:33:47: %LINK-5-CHANGED: Interface FastEthernet5/5, changed state to a administratively down
Switch(config-if)#
This example shows how to reenable Fast Ethernet interface 5/5:
Switch(config-if)# no shutdown
Switch(config-if)#
*Sep 30 08:36:00: %LINK-3-UPDOWN: Interface FastEthernet5/5, changed state to up
Switch(config-if)#
To verify whether an interface is disabled, enter the EXEC show interfaces command. An interface that has been shut down
appears as "administratively down."
Chapter 9 Configuring Interfaces
Catalyst 4500 Series Switch, Cisco IOS Software Configuration Guide - Cisco IOS XE 3.9.xE and IOS
Monitoring and Maintaining the Interface
Purpose
Clears interface counters.
Purpose
Specifies the interface to be configured.
Shuts down the interface.
Reenables the interface.