0 Replies Latest reply: May 4, 2012 8:05 AM by jkoelker RSS

    Interpreting input errors

    jkoelker

      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