Cisco Support Community
Showing results for 
Search instead for 
Did you mean: 
New Member

Input errors

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

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?


Re: Input errors


Ignored packets are those that are discarded because the interface hardware does not have enough internal buffers. Broadcast storms and bursts of noise can result in an increased number of ignored packets. Check your traffic using a SPAN port.



CreatePlease to create content