You definitely should be concerned about this situation. On a properly
functioning circuit, you shouldn't have any input errors, but that's in a
perfect world. One or two from time to time is expected, but 450,000 is
WAAAAAAAAAAYYY too many! 128 isn't too awful, depending on how recently
your counters were cleared, but it warrants some more investigation also.
I suggest you clear your logs and counters and then watch the circuit for
more errors. The next time you see a burst of errors, assuming this is
intermittent and not consistent, call your provider and specifically mention
that this is a chronic problem that has not been resolved satisfactorily
after several trouble tickets have been opened and "closed." If a "chronic"
tag is placed on that circuit ID, they'll look a little closer...usually.
And, often there is a supervisor of some sort making sure they follow up and
get it resolved. If they don't do this for you, switch providers!
This type of behavior could be caused by a bad CSU/DSU, but it's almost
always a problem with the provider's equipment or handiwork. Often all they
need to do is repunch a few cross connects or replace some of their
whosiwhatsits that are always going bad. Whatever the cause, they should be
willing to work on a chronic problem that is this bad until it's resolved to
your satisfaction.
Good luck, and let us all know how this works out!
John Neiberger, CCNA/CCDA
> Just wanted to ask if the following serial links traffic information is
> normal.Both links appear to be in grate shape during business hours,
> however, Drouter1 T1 serial
> link has presented problems from the carrier provider few times, the
> telephone company always comes up saying that prolems have been fixed
when
> they are not.
> When I compare the information on on the serial interfaces for the two
> routers,I noticed from drouter1
> 449441 input errors, 449442 CRC, 0 frame, 0 overrun, 0 ignored, 0 abort,
is
> this caused by cerrier circuit quality ? Is it
> saomething I should be concern about from my end ?
>
>
> from drouter2 which presents no problems at all I noticed
> 128 input errors, 128 CRC, 0 frame, 0 overrun, 0 ignored, 0 abort.
>
>
> Below is the configuration and traffic information.
>
> DROUTER1/ Has presented problems
> Serial0 is up, line protocol is up
> Hardware is MK5025
> Description: Link to Denver
> Internet address is 10.168.2.2/24
> MTU 1500 bytes, BW 1544 Kbit, DLY 20000 usec, rely 255/255, load 15/255
> Encapsulation HDLC, 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 never
> Input queue: 0/75/0 (size/max/drops); Total output drops: 3
> Queueing strategy: weighted fair
> Output queue: 0/1000/64/0 (size/max total/threshold/drops)
> Conversations 0/24/256 (active/max active/max total)
> Reserved Conversations 0/0 (allocated/max allocated)
> 5 minute input rate 185000 bits/sec, 79 packets/sec
> 5 minute output rate 93000 bits/sec, 74 packets/sec
> 5966461 packets input, 1886297446 bytes, 0 no buffer
> Received 512335 broadcasts, 0 runts, 0 giants, 0 throttles
> 449441 input errors, 449442 CRC, 0 frame, 0 overrun, 0 ignored, 0 abort
> 5721635 packets output, 1966272482 bytes, 0 underruns
> 0 output errors, 0 collisions, 13 interface resets
> 0 output buffer failures, 0 output buffers swapped out
> 43 carrier transitions
>
>
> DROUTER2 - T1 Circuit operates normally
> drouter2>show int s0
> Serial0 is up, line protocol is up
> Hardware is MK5025
> Description: Link to Chicago
> Internet address is 10.168.1.2/24
> MTU 1500 bytes, BW 1544 Kbit, DLY 20000 usec, rely 255/255, load 1/255
> Encapsulation HDLC, loopback not set, keepalive set (10 sec)
> Last input 00:00:03, output 00:00:02, output hang never
> Last clearing of "show interface" counters never
> Input queue: 0/75/0 (size/max/drops); Total output drops: 0
> Queueing strategy: weighted fair
> Output queue: 0/1000/64/0 (size/max total/threshold/drops)
> Conversations 0/12/256 (active/max active/max total)
> Reserved Conversations 0/0 (allocated/max allocated)
> 5 minute input rate 18000 bits/sec, 5 packets/sec
> 5 minute output rate 1000 bits/sec, 3 packets/sec
> 692741 packets input, 136788669 bytes, 0 no buffer
> Received 17091 broadcasts, 0 runts, 0 giants, 0 throttles
> 128 input errors, 128 CRC, 0 frame, 0 overrun, 0 ignored, 0 abort
> 367369 packets output, 33102788 bytes, 0 underruns
> 0 output errors, 0 collisions, 1 interface resets
> 0 output buffer failures, 0 output buffers swapped out
> 17 carrier transitions
>
> Jorge Rodriguez /CCNA
> Network Analyst
> R&S Networks Inc
> 1112 Boylston Street
> Suite 222
> Boston, MA 02115
> 1-781-614-1294
> http://www.netwire.n3.net/
> http://www.learncisco.n3.net/
>
> ........................................................
> iWon.com http://www.iwon.com why wouldn't you?
> ........................................................
>
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