Serial Link fluctuation

Unanswered Question
Oct 27th, 2009
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I m having the problem , that one of my serial interface is having the problem,(mentioned below)


If I have to clear counters for this , what command I have to use


#sh int serial 0/3/0:0

Serial0/3/0:0 is up, line protocol is up

Hardware is GT96K Serial

Description: ""

Internet address is 10.100.1.22/30

MTU 1500 bytes, BW 1984 Kbit, DLY 20000 usec,

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

Encapsulation PPP, LCP Open

Open: IPCP, CDPCP, loopback not set

Keepalive set (10 sec)

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

Last clearing of "show interface" counters 11w0d

Input queue: 0/75/0/0 (size/max/drops/flushes); Total output drops: 0

Queueing strategy: weighted fair

Output queue: 0/1000/64/0 (size/max total/threshold/drops)

Conversations 0/2/256 (active/max active/max total)

Reserved Conversations 0/0 (allocated/max allocated)

Available Bandwidth 1488 kilobits/sec

5 minute input rate 0 bits/sec, 0 packets/sec

5 minute output rate 2000 bits/sec, 0 packets/sec

2566324 packets input, 95859970 bytes, 0 no buffer

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

1165256869 input errors, 1165256869 CRC, 160039864 frame, 107137 overrun, 0

ignored, 159459248 abort

4134688 packets output, 577947536 bytes, 0 underruns

0 output errors, 0 collisions, 27583 interface resets

0 output buffer failures, 0 output buffers swapped out

8 carrier transitions

Timeslot(s) Used:1-31, SCC: 0, Transmitter delay is 0 flags

MP-BHP-CTX-OCBT#sh int serial 0/3/1:0

Serial0/3/1:0 is up, line protocol is up

Hardware is GT96K Serial

Description: "MP-BPL-ARE-CR01-MP-BPL-CTX-OCBT"

Internet address is 10.100.2.22/30

MTU 1500 bytes, BW 1984 Kbit, DLY 20000 usec,

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

Encapsulation PPP, LCP Open

Open: IPCP, CDPCP, loopback not set

Keepalive set (10 sec)

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

Last clearing of "show interface" counters 11w0d

Input queue: 0/75/0/0 (size/max/drops/flushes); Total output drops: 0

Queueing strategy: weighted fair

Output queue: 0/1000/64/0 (size/max total/threshold/drops)

Conversations 0/7/256 (active/max active/max total)

Reserved Conversations 0/0 (allocated/max allocated)

Available Bandwidth 1488 kilobits/sec

5 minute input rate 2000 bits/sec, 4 packets/sec

5 minute output rate 1000 bits/sec, 2 packets/sec

5240102 packets input, 602741423 bytes, 0 no buffer

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

574 input errors, 574 CRC, 370 frame, 294 overrun, 0 ignored, 212 abort

6152117 packets output, 851036089 bytes, 0 underruns

0 output errors, 0 collisions, 1 interface resets

0 output buffer failures, 0 output buffers swapped out

8 carrier transitions

Timeslot(s) Used:1-31, SCC: 1, Transmitter delay is 0 flags


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Amit Singh Tue, 10/27/2009 - 02:29
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clear counters [{interface interface-number}


clear counters interface serial 0/3/0:0



lgijssel Tue, 10/27/2009 - 02:39
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Clear counter will not resolve your issue.

It appears that the first link is suffering from a bad input signal. There are countless input errors and the interface has reset itself many times.

You should try to locate and fix the problem which will result in the counters not increasing anymore.

Clearing them afterwards is purely cosmetic.


regards,

Leo

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