I have a Gig Fiber interface this incrementing like mad with crc and input errors. What is best method to troubleshoot?
CA-ANHM-HBR-R12-01#sh interfaces GigabitEthernet5/1
GigabitEthernet5/1 is up, line protocol is up
Hardware is GigMac 3 Port GigabitEthernet, address is 0005.00d5.5e81 (bia 0005.00d5.5e81)
Description: *** Gi - Core Services
Internet address is 204.8.136.1/27
MTU 1500 bytes, BW 1000000 Kbit, DLY 10 usec, rely 225/255, load 1/255
Encapsulation ARPA, loopback not set
Keepalive not set
Full Duplex, 1000Mbps, link type is force-up, media type is SX
output flow-control is unsupported, input flow-control is unsupported
ARP type: ARPA, ARP Timeout 08:00:00
Last input 00:00:00, output 00:00:00, output hang never
Last clearing of "show interface" counters 00:16:13
Queueing strategy: fifo
Output queue 0/40, 0 drops; input queue 0/75, 0 drops
30 second input rate 239000 bits/sec, 55 packets/sec
30 second output rate 110000 bits/sec, 60 packets/sec
59400 packets input, 16361956 bytes, 0 no buffer
Received 28 broadcasts, 278 runts, 0 giants, 0 throttles
9679 input errors, 5459 CRC, 0 frame, 0 overrun, 0 ignored
0 watchdog, 502 multicast, 0 pause input
63231 packets output, 10346406 bytes, 0 underruns
Transmitted 429 broadcasts
0 output errors, 0 collisions, 0 interface resets
0 babbles, 0 late collision, 0 deferred
0 lost carrier, 0 no carrier, 0 pause output
0 output buffer failures, 0 output buffers swapped out
CA-ANHM-HBR-R12-01#
