shutdown_cisco_interface
Table of Contents
Shutdown Cisco Interface
Jan 2024
Introduction
While working with certain products, usually remotely, it is quite handy to unplug a Network Cable to test resilience (ensure that a backup route or device is used).
However, when remote this is almost impossible, so to simulate this we can just take down the relevant interface on the Cisco to simulate a cable disconnect.
Shutdown Interface
Before shutting down any interfaces, lets look a the status of the interfaces from the console. We can do this at the top level buy using this command:
sh interfaces status
You will get an output similar to below:
Port Name Status Vlan Duplex Speed Type Gi0/1 MNGT notconnect 100 auto auto 10/100/1000BaseTX Gi0/2 MNGT notconnect 100 auto auto 10/100/1000BaseTX Gi0/3 MNGT notconnect 100 auto auto 10/100/1000BaseTX Gi0/4 MNGT notconnect 100 auto auto 10/100/1000BaseTX Gi0/5 MNGT notconnect 100 auto auto 10/100/1000BaseTX Gi0/6 MNGT notconnect 100 auto auto 10/100/1000BaseTX Gi0/7 MNGT notconnect 100 auto auto 10/100/1000BaseTX Gi0/8 MNGT notconnect 100 auto auto 10/100/1000BaseTX Gi0/9 MNGT notconnect 100 auto auto 10/100/1000BaseTX Gi0/10 MNGT notconnect 100 auto auto 10/100/1000BaseTX Gi0/11 MNGT notconnect 100 auto auto 10/100/1000BaseTX Gi0/12 MNGT notconnect 100 auto auto 10/100/1000BaseTX Gi0/13 ENCtoMuxPri notconnect 100 auto auto 10/100/1000BaseTX Gi0/14 ENCtoMuxPri notconnect 100 auto auto 10/100/1000BaseTX Gi0/15 ENCtoMuxPri notconnect 100 auto auto 10/100/1000BaseTX Gi0/16 ENCtoMuxPri notconnect 100 auto auto 10/100/1000BaseTX Gi0/17 ENCtoMuxPri notconnect 100 auto auto 10/100/1000BaseTX Gi0/18 ENCtoMuxPri notconnect 100 auto auto 10/100/1000BaseTX Gi0/19 ENCtoMuxPri notconnect 100 auto auto 10/100/1000BaseTX Gi0/20 ENCtoMuxPri notconnect 100 auto auto 10/100/1000BaseTX Gi0/21 ENCtoMuxPri notconnect 100 auto auto 10/100/1000BaseTX Gi0/22 ENCtoMuxPri notconnect 100 auto auto 10/100/1000BaseTX Gi0/23 ENCtoMuxPri connected 100 a-full a-1000 10/100/1000BaseTX Gi0/24 ENCtoMuxPri notconnect 100 auto auto 10/100/1000BaseTX
Interface 23 is connected, the rest are not.
To shutdown an interface, we first have to select it as we would normally do for any other operation.
en (enter password) conf t int gigabitEthernet 0/1 (nic 1) - (or you could shutdown a range with int gigabitEthernet 0/1-12 for example) sh end
Now if you repeat the following command:
sh interfaces status
You will see that the first interface is shown as disabled.
Port Name Status Vlan Duplex Speed Type Gi0/1 MNGT disabled 100 auto auto 10/100/1000BaseTX Gi0/2 MNGT notconnect 100 auto auto 10/100/1000BaseTX Gi0/3 MNGT notconnect 100 auto auto 10/100/1000BaseTX Gi0/4 MNGT notconnect 100 auto auto 10/100/1000BaseTX Gi0/5 MNGT notconnect 100 auto auto 10/100/1000BaseTX Gi0/6 MNGT notconnect 100 auto auto 10/100/1000BaseTX Gi0/7 MNGT notconnect 100 auto auto 10/100/1000BaseTX Gi0/8 MNGT notconnect 100 auto auto 10/100/1000BaseTX Gi0/9 MNGT notconnect 100 auto auto 10/100/1000BaseTX Gi0/10 MNGT notconnect 100 auto auto 10/100/1000BaseTX Gi0/11 MNGT notconnect 100 auto auto 10/100/1000BaseTX Gi0/12 MNGT notconnect 100 auto auto 10/100/1000BaseTX Gi0/13 ENCtoMuxPri notconnect 100 auto auto 10/100/1000BaseTX Gi0/14 ENCtoMuxPri notconnect 100 auto auto 10/100/1000BaseTX Gi0/15 ENCtoMuxPri notconnect 100 auto auto 10/100/1000BaseTX Gi0/16 ENCtoMuxPri notconnect 100 auto auto 10/100/1000BaseTX Gi0/17 ENCtoMuxPri notconnect 100 auto auto 10/100/1000BaseTX Gi0/18 ENCtoMuxPri notconnect 100 auto auto 10/100/1000BaseTX Gi0/19 ENCtoMuxPri notconnect 100 auto auto 10/100/1000BaseTX Gi0/20 ENCtoMuxPri notconnect 100 auto auto 10/100/1000BaseTX Gi0/21 ENCtoMuxPri notconnect 100 auto auto 10/100/1000BaseTX Gi0/22 ENCtoMuxPri notconnect 100 auto auto 10/100/1000BaseTX Gi0/23 ENCtoMuxPri connected 100 a-full a-1000 10/100/1000BaseTX Gi0/24 ENCtoMuxPri notconnect 100 auto auto 10/100/1000BaseTX
Bring Up Interface
To bring the interface back up, use the following:
en (enter password) conf t int gigabitEthernet 0/1 (nic 1) - (or you could bring up a range with int gigabitEthernet 0/1-12 for example) no sh end
Bring Up/Down more Interfaces
When we select the interface to Shutdown/Bring up we used in this above example:
int gigabitEthernet 0/1
This shuts down a single interface (The first interface on the box). We could however shutdown the first 10 interfaces by using:
en (enter password) conf t int range gigabitEthernet 0/1-10 no sh end
Now we can see the first 10 interfaces are down:
Port Name Status Vlan Duplex Speed Type Gi0/1 MNGT disabled 100 auto auto 10/100/1000BaseTX Gi0/2 MNGT disabled 100 auto auto 10/100/1000BaseTX Gi0/3 MNGT disabled 100 auto auto 10/100/1000BaseTX Gi0/4 MNGT disabled 100 auto auto 10/100/1000BaseTX Gi0/5 MNGT disabled 100 auto auto 10/100/1000BaseTX Gi0/6 MNGT disabled 100 auto auto 10/100/1000BaseTX Gi0/7 MNGT disabled 100 auto auto 10/100/1000BaseTX Gi0/8 MNGT disabled 100 auto auto 10/100/1000BaseTX Gi0/9 MNGT disabled 100 auto auto 10/100/1000BaseTX Gi0/10 MNGT disabled 100 auto auto 10/100/1000BaseTX Gi0/11 MNGT notconnect 100 auto auto 10/100/1000BaseTX Gi0/12 MNGT notconnect 100 auto auto 10/100/1000BaseTX Gi0/13 ENCtoMuxPri notconnect 100 auto auto 10/100/1000BaseTX Gi0/14 ENCtoMuxPri notconnect 100 auto auto 10/100/1000BaseTX Gi0/15 ENCtoMuxPri notconnect 100 auto auto 10/100/1000BaseTX Gi0/16 ENCtoMuxPri notconnect 100 auto auto 10/100/1000BaseTX Gi0/17 ENCtoMuxPri notconnect 100 auto auto 10/100/1000BaseTX Gi0/18 ENCtoMuxPri notconnect 100 auto auto 10/100/1000BaseTX Gi0/19 ENCtoMuxPri notconnect 100 auto auto 10/100/1000BaseTX Gi0/20 ENCtoMuxPri notconnect 100 auto auto 10/100/1000BaseTX Gi0/21 ENCtoMuxPri notconnect 100 auto auto 10/100/1000BaseTX Gi0/22 ENCtoMuxPri notconnect 100 auto auto 10/100/1000BaseTX Gi0/23 ENCtoMuxPri connected 100 a-full a-1000 10/100/1000BaseTX Gi0/24 ENCtoMuxPri notconnect 100 auto auto 10/100/1000BaseTX
shutdown_cisco_interface.txt · Last modified: 2024/01/18 15:16 by walkeradmin