RE: DS-3 Issue

From: Richard Dumoulin (richard.dumoulin@vanco.es)
Date: Sat May 08 2004 - 19:00:27 GMT-3


Richard, I found the e-mail. It says this:

"we had a high number of 'output drops' on the serial interface.

We resolved the issue by setting the queuing on the serial interface to
FIFO, and setting the hold-queue size to be 2000 out and 500 in

e.g.

interface Serial1/3:0

hold-queue 500 in

hold-queue 2000 out"

Although it's not the same issue it seems related. Let me know if it helped,

--Richard

-----Original Message-----
From: Richard Dumoulin
Sent: sabado, 08 de mayo de 2004 23:56
To: 'Richard Danu'; ccielab@groupstudy.com
Subject: RE: DS-3 Issue

Richard, I remember a colleague in my company experiencing the same issue
and if I remember well there was a command that solved the issue. I think it
was the hold-queue command that was set to some value. I will do a search on
my outlook to see if I find the e-mail,

--Richard

-----Original Message-----
From: Richard Danu [mailto:rdanu@apex3.com <mailto:rdanu@apex3.com> ]
Sent: sabado, 08 de mayo de 2004 22:42
To: ccielab@groupstudy.com
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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