From: Chris Larson (clarson52@comcast.net)
Date: Sun May 09 2004 - 14:43:11 GMT-3
I have read the posts on the crc errors and IMHO that would definetly be
something to look into.
Another possibility is if you are doing VPN's over the ds-3 there may be an
mtu problem. The symptoms are similiar as when you can't get larger packets
through but you can get smaller packets through. Just a thought. It is what
immediatly came to mind before I went on and read the post about crc due to
a recent issue I had with similiar symptoms. CRC sounds good, but I thought
I might throw it in here anyway.
Chris
----- Original Message -----
From: "Richard Danu" <rdanu@apex3.com>
To: <ccielab@groupstudy.com>
Sent: Saturday, May 08, 2004 4:42 PM
Subject: DS-3 Issue
> Hi,
>
> I just wanted to ask and see if anyone has experienced an "input error"
> problem on a 7200 VXR with a (Serial DS-3) card.
> Apparently, when I perform an extended packet "ping" with a 1500 datagram
> size, I get intermittent dropped/failed icmp packets. Evidently, the local
> DS-3 Card is experiencing input errors.
>
> If I perform an extended ping with a datagram size of 50, all of the
> requests reply 100%.
>
> I am inclined to belive this might be a bad card or some issues with input
> buffer memory. If any of you have any thoughts or have expeienced this
> issue, any feedback is appreciated.
>
> Thanks,
> Richard Danu
>
> HQ-ACCESS01#sh int s2/0
> Serial2/0 is up, line protocol is up
> Hardware is M1T-T3 pa
> Internet address is 10.110.30.1/30
> MTU 1500 bytes, BW 44210 Kbit, DLY 200 usec,
> reliability 247/255, txload 7/255, rxload 34/255
> Encapsulation HDLC, crc 16, 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 06:06:14
> Queueing strategy: fifo
> Output queue 0/40, 0 drops; input queue 0/75, 0 drops
> 5 minute input rate 5954000 bits/sec, 735 packets/sec
> 5 minute output rate 1348000 bits/sec, 578 packets/sec
> 17585814 packets input, 467620769 bytes, 0 no buffer
> Received 0 broadcasts, 0 runts, 0 giants, 0 throttles
> 0 parity
> 1168366 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored, 1168366
> abort
>
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
> ^^^^^^^^^^^^^^^^^
> 13859594 packets output, 3898977591 bytes, 0 underruns
> 0 output errors, 0 applique, 0 interface resets
> 0 output buffer failures, 0 output buffers swapped out
> 0 carrier transitions
> rxLOS inactive, rxLOF inactive, rxAIS inactive
> txAIS inactive, rxRAI inactive, txRAI inactive
>
>
> HQ-ACCESS01#ping
> Protocol [ip]:
> Target IP address: 10.110.71.1
> Repeat count [5]: 200
> Datagram size [100]: 1500
> Timeout in seconds [2]:
> Extended commands [n]:
> Sweep range of sizes [n]:
> Type escape sequence to abort.
> Sending 200, 1500-byte ICMP Echos to 10.110.71.1, timeout is 2 seconds:
> !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!.!!!!!!!
> !!!!!!!!!!!!!!!!!!!!!!!!!.!!!!!!!!.!.!!!!!!!!!!!!!.!!!!!!!!!!!!!!!!!!!
> !!!!!!!!!!!!!!!!!!!!.!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
> Success rate is 97 percent (194/200), round-trip min/avg/max = 1/12/1748
ms
> HQ-ACCESS01#
>
> HQ-ACCESS01#ping
> Protocol [ip]:
> Target IP address: 10.110.71.1
> Repeat count [5]: 200
> Datagram size [100]: 50
> Timeout in seconds [2]:
> Extended commands [n]:
> Sweep range of sizes [n]:
> Type escape sequence to abort.
> Sending 200, 50-byte ICMP Echos to 10.110.71.1, timeout is 2 seconds:
> !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
> !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
> !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
> Success rate is 100 percent (200/200), round-trip min/avg/max = 1/2/8 ms
>
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