Shutdown Command on CISCO Router/Switch

Command

shutdown

Use

This command will administratively disable an interface. Alternatively, you can enable the interface by negating the command using no shutdown.

Syntax

Router(config-if)#shutdown
OR
Router(config-if)#no shutdown

Example

In the below example, we shutdown R1’s Fa0/0 interface and then enable the interface again.

R1(config)#int fa0/0
R1(config-if)#shutdown
R1(config-if)#
*Mar 1 19:17:34.339: %DUAL-5-NBRCHANGE: IP-EIGRP(0) 100: Neighbor 10.1.1.2 (FastEthernet0/0) is down: interface down
R1(config-if)#
*Mar 1 19:17:36.315: %LINK-5-CHANGED: Interface FastEthernet0/0, changed state to administratively down
*Mar 1 19:17:37.315: %LINEPROTO-5-UPDOWN: Line protocol on Interface FastEthernet0/0, changed state to down

R1(config-if)#do show ip int br
Interface IP-Address OK? Method Status Protocol
FastEthernet0/0 10.1.1.1 YES NVRAM administratively down down

R1(config-if)#no shut
R1(config-if)#
*Mar 1 19:17:53.111: %DUAL-5-NBRCHANGE: IP-EIGRP(0) 100: Neighbor 10.1.1.2 (FastEthernet0/0) is up: new adjacency
R1(config-if)#
*Mar 1 19:17:53.411: %LINK-3-UPDOWN: Interface FastEthernet0/0, changed state to up
*Mar 1 19:17:54.411: %LINEPROTO-5-UPDOWN: Line protocol on Interface FastEthernet0/0, changed state to up

R1(config-if)#do show ip int br
Interface IP-Address OK? Method Status Protocol
FastEthernet0/0 10.1.1.1 YES NVRAM up up

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