show interface loopback

This command displays information about configured loopback interfaces.

Format show interface loopback [loopback-id]
Mode Privileged EXEC

If you do not specify a loopback ID, the following information appears for each loopback interface on the system:

Column
Meaning
Loopback ID The loopback ID associated with the rest of the information in the row.
Interface The interface name.
IP Address The IPv4 address of the interface.

If you specify a loopback ID, the following information appears:

Column
Meaning
Interface Link Status Shows whether the link is up or down.
IP Address The IPv4 address of the interface.
MTU size The maximum transmission size for packets on this interface, in bytes.