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Interpreting input errors

May 4, 2012 8:05 AM

jkoelker 42 posts since
Oct 9, 2008

Hi - looking for some advice on how to interpret input errors seen on a serial PPP link, Cisco 2811 router running 12.4(23). Here's the output:

 

MOHRTR01#sh inter se 0/0/0:0

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

  Hardware is GT96K Serial

  Internet address is 10.10.55.242/30

  MTU 1500 bytes, BW 1536 Kbit/sec, DLY 20000 usec,

     reliability 255/255, txload 4/255, rxload 29/255

  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 1w2d

  Input queue: 0/75/0/0 (size/max/drops/flushes); Total output drops: 20001

  Queueing strategy: Class-based queueing

  Output queue: 0/1000/64/19984 (size/max total/threshold/drops)

     Conversations  0/41/256 (active/max active/max total)

     Reserved Conversations 1/1 (allocated/max allocated)

     Available Bandwidth 1 kilobits/sec

  5 minute input rate 180000 bits/sec, 41 packets/sec

  5 minute output rate 30000 bits/sec, 31 packets/sec

     18511038 packets input, 2491348771 bytes, 0 no buffer

     Received 0 broadcasts, 5 runts, 7 giants, 0 throttles

     604661 input errors, 604658 CRC, 221229 frame, 64621 overrun, 0 ignored, 315746 abort

     17284005 packets output, 3805540406 bytes, 0 underruns

     0 output errors, 0 collisions, 1 interface resets

     1 unknown protocol drops

     0 output buffer failures, 0 output buffers swapped out

     19 carrier transitions

  Timeslot(s) Used:1-24, SCC: 0, Transmitter delay is 0 flags

MOHRTR01#

 

Same model router at a different location connecting the same way to our campus (T1) shows far fewer errors. Wondering what this may mean and what, if anything, I should be doing about it.

 

Also, this link has shown high transmited utilization (75 - 80%) for two ~ 20 minute periods over the last 18 hours. Trying to determine if this is cause for concern or not.

 

Thanks.

 

Jon Koelker

Oyster River School District

Durham, NH

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