I have a 2811 with the latest IOS on it and my interface FA0/0 is constantly counting up input errors.
I have changed the cable set the speed and duplex and tried auto for both sides. There are no errors on the switch, but I changed the port on the switch just for fun. 🙂
Here is my show interface fa0/0
Router#sh inter fa0/0
FastEthernet0/0 is up, line protocol is up
Hardware is MV96340 Ethernet, address is 0014.f201.5be0 (bia 0014.f201.5be0)
Description: $ETH-LAN$Router interface
Internet address is 6.2.12.1/24
MTU 1500 bytes, BW 100000 Kbit, DLY 100 usec,
reliability 255/255, txload 22/255, rxload 6/255
Encapsulation ARPA, loopback not set
Keepalive set (10 sec)
Full-duplex, 100Mb/s, 100BaseTX/FX
ARP type: ARPA, ARP Timeout 04:00:00
Last input 00:00:00, output 00:00:00, output hang never
Last clearing of "show interface" counters 00:26:07
Input queue: 0/75/0/0 (size/max/drops/flushes); Total output drops: 0
Queueing strategy: fifo
Output queue: 0/40 (size/max)
5 minute input rate 2364000 bits/sec, 1828 packets/sec
5 minute output rate 8649000 bits/sec, 1552 packets/sec
2949726 packets input, 543040449 bytes
Received 14995 broadcasts, 0 runts, 0 giants, 0 throttles
3559 input errors, 0 CRC, 0 frame, 0 overrun, 3559 ignored
0 watchdog
0 input packets with dribble condition detected
2491240 packets output, 1725241583 bytes, 0 underruns
0 output errors, 0 collisions, 0 interface resets
0 babbles, 0 late collision, 0 deferred
0 lost carrier, 0 no carrier
0 output buffer failures, 0 output buffers swapped out
Any idea what this could be or should I even worry about it?