|  | 12.4 | IGRP
| 12.4.5 | The show ip interfaces command
The show ip interfaces command displays the status and global parameters associated with all IP interfaces. The Cisco IOS software automatically enters a directly-connected route in the routing table if the interface is one through which software can send and receive packets. Such an interface is marked up. If the interface is unusable, it is removed from the routing table. Removing the entry allows the use of backup routes, if they exist.