What is the reason if the interface is up and the line protocol is down?

FastEthernet0 is up, line protocol is down: In this case, Physical layer is operational. The line protocol being down indicates a clocking or framing problem. Probable reasons for this are encapsulation and clock rate mismatches.

How do you show brief information about interfaces in terms of IP?

IOS command #2: Show IP interface brief The show IP interface brief command gives you the answers to these questions and is the best summary of the status, protocol and IP addresses of your interfaces. This command can be used in both User EXEC and Privileged EXEC mode. This command can be abbreviated sh ip int brie.

How do I see interfaces on Cisco router?

If you use the show interfaces command on the Cisco 7200 series routers without the slot/port arguments, information for all interface types will be shown. For example, if you type show interfaces ethernet you will receive information for all ethernet, serial, Token Ring, and FDDI interfaces.

How do you troubleshoot an interface?

Troubleshooting: Faulty Ethernet Physical Interface on an M Series, an MX Series, or a T Series Router

1. Check the Cable Connection.
2. Check the Physical Link Status of the Interface.
3. Check the Interface Statistics in Detail.
4. Perform the Loopback Diagnostic Test.
5. Check for Other Possibilities.
6. Enable a Physical Interface.

What is show IP interface command?

The show ip interface command provides tons of useful information about the configuration and status of the IP protocol and its services, on all interfaces. The show ip interface brief command provides a quick status of the interfaces on the router, including their IP address, Layer 2 status, and Layer 3 status.

What command will let you display an interface status?

Use the show interfaces EXEC command to display statistics for all interfaces configured on the router or access server.

What do you do for the interface showing administratively down?

You can mark an interface administratively down with the “shutdown” command, and turn it on with the “no shutdown” command. If an interface is shut down, it will display administratively down when using the “show interface” command. REMEMBER TO DO A “NO SHUTDOWN” COMMAND WHEN YOU HAVE CONFIGURED A DEVICE….

How do I bring up the Cisco interface?

To bring the interface up, use the no shutdown command under interface configuration mode.