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lots of input errors

Unanswered Question
Nov 28th, 2006
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gsr ios:12.0.31S5

module: 2 Port ES Packet Over SONET OC-192c/STM-64

question: show interface

MTU 4470 bytes, BW 9952000 Kbit, DLY 100 usec, rely 255/255, load 83/255

Encapsulation HDLC, crc 32, loopback not set

Keepalive set (10 sec)

Scramble enabled

Last input 00:00:01, output 00:00:01, output hang never

Last clearing of "show interface" counters 00:41:24

Queueing strategy: fifo

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

5 minute input rate 2810144000 bits/sec, 671994 packets/sec

5 minute output rate 3270123000 bits/sec, 852785 packets/sec

1668857620 packets input, 871705121205 bytes, 0 no buffer

Received 0 broadcasts, 518849 runts, 0 giants, 0 throttles

0 parity

631850 input errors, 112908 CRC, 0 frame, 0 overrun, 0 ignored, 93 abort

2108674120 packets output, 1016826523728 bytes, 0 underruns

0 output errors, 0 applique, 0 interface resets

0 output buffer failures, 0 output buffers swapped out

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Overall Rating: 2 (2 ratings)
rajivrajan1 Mon, 12/11/2006 - 19:43
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physical layer issue.CRC is increasing rapidly.

ochuko Wed, 01/24/2007 - 07:37
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with such high input errors and increasing crc values, this suggest a physical layer problem. you can also see that you recieve a lot of runts .this could be due to number of factors, faulty cable,Network noise due to near by electronics/Grounding,Fautly Transciever or adapter, fault at the TX side of line, etc bottom line check for physical layer issues.Network analyzer may help to pin down the problem source.

rharvey57 Wed, 01/31/2007 - 08:14
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Is this a new install? did you recently light up this fiber? We know it is SM fiber, thus there could be attenuation issues at the RX, maybe need to see the DB level verse the specifications and see if you are in-line !

please advise,

libanm Wed, 01/31/2007 - 23:03
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Please post your show controller POS interface, this should kind of give you where the errors are accuring, if you place a internal loop does the error stop? i would check the light level, then engage your ISP for H2H test( head 2 head)


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