Cisco Intput Errors and CRC's increment
Hello Experts,
Our WAN interface is experiencing a large amount input errors and output errors, see below. Of particular notice is the fact the input errors are identical to the CRCs.
My initial thoughts are the problem is with the service provider. However, because the input errors are identical I'm not sure it the problem is with the provider?
Any help will be appreciated..
Cheers
Carlton
Our WAN interface is experiencing a large amount input errors and output errors, see below. Of particular notice is the fact the input errors are identical to the CRCs.
My initial thoughts are the problem is with the service provider. However, because the input errors are identical I'm not sure it the problem is with the provider?
Any help will be appreciated..
Cheers
Carlton
Try
conf t
interface Serial0/0/0:0
clear counters
And then watch how fast CRC errors is growing.
conf t
interface Serial0/0/0:0
clear counters
And then watch how fast CRC errors is growing.
ASKER
Hi Matt,
I did what you suggested and the CRC's started incrementing straight away :-(
I did what you suggested and the CRC's started incrementing straight away :-(
CRC errors
Indicates that the cyclic redundancy checksum generated by the originating LAN station or far-end device does not match the checksum calculated from the data received. On a LAN, this usually indicates noise or transmission problems on the LAN interface or the LAN bus itself. A high number of CRCs is usually the result of collisions or a station transmitting bad data.
Can you post config of this port? Speed, duplex?
ASKER CERTIFIED SOLUTION
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reliability 251/255
My money is on a cabling issue.
ASKER
Cheers
ASKER
Forgot the output:
Serial0/0/0:0 is up, line protocol is up
Hardware is GT96K Serial
Description: BT MPLS 1BRACGNL.0394
MTU 1500 bytes, BW 1986 Kbit/sec, DLY 20000 usec,
reliability 251/255, txload 30/255, rxload 7/255
Encapsulation FRAME-RELAY IETF, loopback not set
Keepalive set (10 sec)
LMI enq sent 1139, LMI stat recvd 1138, LMI upd recvd 0, DTE LMI up
LMI enq recvd 0, LMI stat sent 0, LMI upd sent 0
LMI DLCI 0 LMI type is ANSI Annex D frame relay DTE
FR SVC disabled, LAPF state down
Broadcast queue 0/64, broadcasts sent/dropped 0/0, interface broadcasts 0
Last input 00:00:00, output 00:00:00, output hang never
Last clearing of "show interface" counters 03:09:43
Input queue: 0/75/0/0 (size/max/drops/flushes); Total output drops: 209
Queueing strategy: Class-based queueing
Output queue: 0/1000/64/209 (size/max total/threshold/drops)
Conversations 0/96/256 (active/max active/max total)
Reserved Conversations 1/1 (allocated/max allocated)
Available Bandwidth 717 kilobits/sec
5 minute input rate 60000 bits/sec, 44 packets/sec
5 minute output rate 235000 bits/sec, 52 packets/sec
468880 packets input, 125910744 bytes, 0 no buffer
Received 0 broadcasts, 0 runts, 0 giants, 0 throttles
318 input errors, 318 CRC, 116 frame, 33 overrun, 0 ignored, 203 abort
592137 packets output, 471008276 bytes, 0 underruns
0 output errors, 0 collisions, 0 interface resets
0 unknown protocol drops
0 output buffer failures, 0 output buffers swapped out
0 carrier transitions
Timeslot(s) Used:1-31, SCC: 0, Transmitter delay is 0 flags