Severely High Interface Reset on Serial Lines

Hello guys,

We have two routers on the end of a PPP multilink WAN link (the PPP bundle
consists of 6 E1 lines). Any time we have fluctuations in the link, we
suddenly have unreasonably high interface reset values as highlighted in the
"sh int" output below. The "sh ver" output is also shown, mainly the IOS
section. Please assist in getting to the root of this problem. Regards.

Router#sh int se0/0/0:1
Serial0/0/0:1 is up, line protocol is up
  Hardware is GT96K Serial
  Description:
  MTU 1500 bytes, BW 2048 Kbit/sec, DLY 20000 usec,
     reliability 255/255, txload 73/255, rxload 125/255
  Encapsulation PPP, LCP Open, multilink Open
  Link is a member of Multilink bundle Multilink2, 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 14:35:50
  Input queue: 0/75/0/0 (size/max/drops/flushes); Total output drops: 331
  Queueing strategy: weighted fair [suspended, using FIFO]
  FIFO output queue 2/40, 331 drops
  5 minute input rate 1008000 bits/sec, 690 packets/sec
  5 minute output rate 590000 bits/sec, 562 packets/sec
     16762470 packets input, 3263085594 bytes, 0 no buffer
     Received 0 broadcasts, 0 runts, 0 giants, 0 throttles
     114 input errors, 98 CRC, 0 frame, 0 overrun, 0 ignored, 0 abort
     12888564 packets output, 1514228209 bytes, 0 underruns
     0 output errors, 0 collisions, 4294967292 interface resets
     0 unknown protocol drops
     0 output buffer failures, 0 output buffers swapped out
     8 carrier transitions
  Timeslot(s) Used:1-31, SCC: 0, Transmitter delay is 0 flags

Router#sh ver
Cisco IOS Software, 3800 Software (C3845-ADVIPSERVICESK9-M), Version
12.4(25), R
ELEASE SOFTWARE (fc2)

Eniola

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Received on Wed Apr 13 2011 - 13:22:56 ART