How to Display Interface States in Cisco Router
To view information about a particular interface, use the show interface command. The show interface command provides the following list of important information:
| Interface State (e.g. UP, DOWN, LOOPED) |
| Protocol addresses |
| Bandwidth |
| Reliability and Load |
| Encapsulation type |
| Packet Rates |
| Error Rates |
| Signaling Status (i.e. DCD,DSR,DTR,RTS,CTS) |
The following is an example of a “show interface serial0″ output:
Router#show interface serial 0 Serial0 is up, line protocol is down Hardware is QUICC Serial Internet address is 10.1.1.2/24 MTU 1500 bytes, BW 1544 Kbit, DLY 20000 usec, rely 255/255, load 1/255 Encapsulation FRAME-RELAY, loopback not set, keepalive set (10 sec) LMI enq sent 207603, LMI stat recvd 113715, LMI upd recvd 0, DTE LMI down LMI enq recvd 0, LMI stat sent 0, LMI upd sent 0 LMI DLCI 1023 LMI type is CISCO frame relay DTE Broadcast queue 0/64, broadcasts sent/dropped 0/0, interface broadcasts 62856 Last input 1w, output 00:00:08, output hang never Last clearing of "show interface" counters never Input queue: 0/75/0 (size/max/drops); Total output drops: 0 Queueing strategy: weighted fair Output queue: 0/64/0 (size/threshold/drops) Conversations 0/1 (active/max active) Reserved Conversations 0/0 (allocated/max allocated) 5 minute input rate 1000 bits/sec, 1 packets/sec 5 minute output rate 0 bits/sec, 0 packets/sec 1012272 packets input, 91255488 bytes, 0 no buffer Received 916 broadcasts, 0 runts, 0 giants 18519 input errors, 0 CRC, 17796 frame, 0 overrun, 0 ignored, 723 abort 283132 packets output, 13712011 bytes, 0 underruns 0 output errors, 0 collisions, 31317 interface resets 0 output buffer failures, 0 output buffers swapped out 3 carrier transitions DCD=up DSR=up DTR=up RTS=up CTS=up