To make changes to an interface, you use the interface command from global configuration mode:
| Router(config)#interface ? | |
| Async | Async interface |
| BVI | Bridge-Group Virtual Interface |
| CTunnel | CTunnel interface |
| Dialer | Dialer interface |
| FastEthernet | FastEthernet IEEE 802.3 |
| Group-Async | Async Group interface |
| Lex | Lex interface |
| Loopback | Loopback interface |
| MFR | Multilink Frame Relay bundle interface |
| Multilink | Multilink-group interface |
| Null | Null interface |
| Serial | Serial Interface |
| Tunnel | Tunnel interface |
| Vif | PGM Multicast Host interface |
| Virtual-Template | Virtual Template interface |
| Virtual-TokenRing | Virtual TokenRing Interface |
| range | interface range command |
Router(config-if)#
Did you notice that the prompt changed to Router(config-if)#? This tells you that you’re in interface configuration mode. And wouldn’t it be nice if the prompt also gave you an indication of what interface you were configuring? Well, at least for now we’ll have to live without the prompt information, because it doesn’t.
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