Cat2900 M CRC errors

[stevel]

hello

i have been receiving a lot of crc errors on a fiber module port. i have replace the fiber patch cable and even went so far as to replace the 4 port fiber card. i can't get a handle on where they are coming from. the other end is connected to a 2900M as well. i only see a larger number of crc on the one interface.

FastEthernet2/2 is up, line protocol is up

Hardware is Fast Ethernet, address is 0003.e393.c468 (bia 0003.e393.c467)

MTU 1500 bytes, BW 100000 Kbit, DLY 100 usec,

reliability 255/255, txload 2/255, rxload 1/255

Encapsulation ARPA, loopback not set

Keepalive not set

Full-duplex, 100Mb/s

ARP type: ARPA, ARP Timeout 04:00:00

Last input 00:00:10, output 00:00:00, output hang never

Last clearing of "show interface" counters 07:23:38

Queueing strategy: fifo

Output queue 0/40, 0 drops; input queue 0/75, 0 drops

5 minute input rate 505000 bits/sec, 170 packets/sec

5 minute output rate 828000 bits/sec, 5 packets/sec

3700127 packets input, 1273379232 bytes

Received 6404 broadcasts, 0 runts, 0 giants, 0 throttles

1095 input errors, 1094 CRC, 1 frame, 38 overrun, 39 ignored

0 watchdog, 560 multicast

0 input packets with dribble condition detected

144957 packets output, 2261653952 bytes, 0 underruns

0 output errors, 0 collisions, 2 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 help in pointing me in the right direction would be greatly appreciated.

thanks

Steve

[deilert]

I would check the device it is connected to , make sure it is also hard coded to 100 full duplex , no auto negotiation

[stevel]

i havd checked that previously.....here is the other port:

FastEthernet2/1 is up, line protocol is up

Hardware is Fast Ethernet, address is 0090.f230.e2dd (bia 0090.f230.e2dd)

MTU 1500 bytes, BW 100000 Kbit, DLY 100 usec, rely 255/255, load 1/255

Encapsulation ARPA, loopback not set, keepalive not set

Full-duplex, 100Mb/s

ARP type: ARPA, ARP Timeout 04:00:00

Last input 00:00:00, output 00:38:40, output hang never

Last clearing of "show interface" counters 3w1d

Queueing strategy: fifo

Output queue 0/40, 0 drops; input queue 0/75, 0 drops

5 minute input rate 1026000 bits/sec, 377 packets/sec

5 minute output rate 618000 bits/sec, 343 packets/sec

275155144 packets input, 3501740008 bytes, 0 no buffer

Received 7773150 broadcasts, 0 runts, 0 giants, 0 throttles

0 input errors, 0 CRC, 0 frame, 0 overrun, 367 ignored, 0 abort

0 watchdog, 1723804 multicast

0 input packets with dribble condition detected

266189068 packets output, 1201088733 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

[mark-obrien]

Do you have the luxury of a second fiber pair that you can swap to for this connection?

Mark

[stevel]

yes i do have some spare dark fibers.....that was going to be my next step, but i wanted to make sure i wasn't overlooking something obvious before i go to the trouble of terminating the spare fiber

thanks

steve.

[deilert]

before you go through the trouble of swapping fiber , I would try to bounce the interface on each side , sometimes the interfaces need to be bounced for the speed & duplex is changed .