Specifications

38 Input/Output Controller Replacement Instructions
Troubleshooting Using the show interfaces fastethernet Command
Anomaly Details
When you use the Cisco IOS software show interfacesfastethernet command, the following output
is normally displayed:
Router# show interfaces fastethernet [ slot/port ]
FastEthernet0/0 is up, line protocol is up
Hardware is DEC21140, address is 00e0.f74f.dc00 (bia 00e0.f74f.dc00)
Internet address is 192.168.255.1
MTU 1500 bytes, BW 100000 Kbit, DLY 100 usec, rely 255/255, load 1/255
Encapsulation ARPA, loopback not set
Keepalive set (10 sec)
Half-duplex, 100Mb/s, MII
ARP type: ARPA, ARP Timeout 04:00:00
Last input never, output 00:00:06, output hang never
Last clearing of "show interface" counters never
Queueing strategy: fifo
Output queue 0/40, 0 drops; input queue 0/75, 0 drops
5 minute input rate 0 bits/sec, 0 packets/sec
5 minute output rate 1000 bits/sec, 0 packets/sec
0 packets input, 0 bytes
Received 0 broadcasts, 0 runts, 0 giants, 0 throttles
0 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored
0 watchdog, 0 multicast
0 input packets with dribble condition detected
51 packets output, 11872 bytes, 0 underruns
0 output errors, 0 collisions, 3 interface resets
0 babbles, 0 late collision, 0 deferred
0 lost carrier, 0 no carrier
0 output buffer failures, 0 output buffers swapped out
When you enter this command using Cisco IOS Release 11.1(10) or older, or Release 11.2(4) or
older with updated Cisco hardware, the “overrun” field (shown in bold in the output above) is always
zero.
If you use this command because you are troubleshooting potential network problems, you may be
expecting to see a number in the overrun field.
Anomaly Workaround
To work around this problem, issue one of the following Cisco IOS software commands to obtain an
overrun value. The command is different for each supported platform:
• Cisco 7500 series routers — Access the VIP console where the affected hardware resides and
issue the following command:
Router# if-con c
• Cisco 7200 series routers — Issue the following command:
Router# show controller fastethernet FE-slot number/0