shutdown / no shutdown
CautionDisable/enable a port
interface <if> → shutdown / no shutdown
Admin-down and up. The err-disabled recovery ritual is shutdown then no shutdown — on the right interface.
Examples
interface Gi1/0/12 shutdown no shutdownBounce a port
Syntax
(config-if)# shutdown / no shutdown
Before you run it
Shutting an active port cuts traffic instantly.
Used when you see
Switch port won't come up
4
See the whole flow →Bounce the port with shutdown / no shutdownFix the err-disable cause before bouncing.
Suspected L2 loop
4
See the whole flow →Shut the offending port to restore serviceCut the suspect port first; investigate after.
Related commands
- show interfaces statusPort status at a glance
- configure terminalEnter config mode
You can carry a laptop to the rack. Signal will not follow.
Check syntax standing in front of the hardware, with no connection at all. Free to install, no ads.
Get it free on the App Store