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What is interface shutdown?
shutdown. The shutdown command disables an interface. The shutdown command can also be applied to a subinterface. In this case, it stops protocol processing on that subinterface without affecting the other subinterfaces or dropping the entire interface.
What is the no shutdown command?
The no shutdown command enables an interface (brings it up). This command must be used in interface configuration mode. It is useful for new interfaces and for troubleshooting. When you’re having trouble with an interface, you may want to try a shut and no shut.
How to enable interface on Cisco-shutdown command?
Simple examples of brining up and down the interfaces on CISCO devices with shutdown and no shutdown commands. Enable an Interface on a CISCO Device. Type the following commands to enable an interface on a CISCO switch or router : # enable. # configure terminal. (config)# interface FastEthernet 0/1. (config-subif)# no shutdown.
How to disable the interface FastEthernet in Cisco?
“Shutdown” Command – Disable Interface. To disable an interface FastEthernet 0/1 on a CISCO switch or router, run: # enable # configure terminal (config)# interface FastEthernet 0/1 (config-subif)# shutdown (config-subif)# end # write. To display a status of the interfaceFastEthernet 0/1, use the show interfaces FastEthernet 0/1 status command:
How to troubleshoot interface down issues in Cisco routers?
If the router/ ports ASIC’s are properly initialised the interface should come up and self ping must work. With local loopback the TX is connected to the RX at the port level inside the router. This test will exclude the SFP and the cables in the packet path.
Why is my TX not working on my Cisco router?
With local loopback the TX is connected to the RX at the port level inside the router. This test will exclude the SFP and the cables in the packet path. Failure of the port to come up/ping itself with a local loop indicates a problem with the Cisco Router.