From: Peasah, Richard Kwame (rpeasah@ku.edu)
Date: Mon Sep 27 2004 - 09:43:33 GMT-3
It's FIFO.
-----Original Message-----
From: Sam Joseph [mailto:samjoseph747@hotmail.com]
Sent: Monday, September 27, 2004 7:35 AM
To: Peasah, Richard Kwame; ccielab@groupstudy.com
Subject: RE: Help:Input Queue Congestion Problem
What is your Queueing type ?. Is it WFQ ?. Did you try to change it to
FIFO
by using the command no fair queue.
Thanks,
Sam.
>From: "Peasah, Richard Kwame" <rpeasah@ku.edu>
>Reply-To: "Peasah, Richard Kwame" <rpeasah@ku.edu>
>To: <ccielab@groupstudy.com>
>Subject: Help:Input Queue Congestion Problem
>Date: Sun, 26 Sep 2004 17:55:17 -0500
>
>Folks,
>
>Can I borrow your brains for a few minutes? My internet router, a Cisco
>7304, is dropping packets from the input queue and I'm having a tough
>time figuring out the cause. Over the past 2 weeks there've been
>instances where all of a sudden it will drop all packets for minutes
and
>then resume forwarding. It's been hard nailing down the exact time this
>behavior occurs. By the time I'm alerted by the help desk, the incident
>is over and the router is back forwarding packets. However, I'm seeing
>lots of flushing going on with respect to the input queue for the
>interface connecting to our ISP. See three instance of "show int"
>output below:
>
>Last clearing of "show interface" counters 03:01:42
>Input queue: 0/75/216/4427 (size/max/drops/flushes); Total output
drops:
>2901
>
>Last clearing of "show interface" counters 03:51:56
>Input queue: 1/75/238/6161 (size/max/drops/flushes); Total output
drops:
>3280
>
>Last clearing of "show interface" counters 05:05:08
>Input queue: 1/75/269/8047 (size/max/drops/flushes); Total output
drops:
>4443
>
>Since I don't have a baseline to compare with I really can't tell
>whether this is normal (the flushes and the drops) but it sure doesn't
>look normal to me. Anyone with experience with this stuff please shed
>some light on this, please. I've both cef and fast switching configured
>and I'm not seeing any cache misses so far. At this point, one thing
>jumping at me is the "bad hop count" in the "sh ip traffic" output.
This
>counter keeps incrementing as can be see below:
>
>08:00 7242548
>
>10:00 7267491
>
>12:00 7314403
>
>15:00 7387856
>
>16:00 7402531
>
>17:00 7419743
>
>I've been scouring CCO for some pointers without success. Some
technotes
>suggest I turn on "debug ip error" but I'm really reluctant (actually
>scared) to do that for fear of taking the whole damn thing down. This
is
>our only internet node so until I get a nod for them "Big Kahunas" I
>ain't doing no debugging. Any ideas? And oh, I've been checking my
>buffers and so far no misses there.
>
>Richard Peasah, Ph.D., CCIE 13662
>Networking & Telecommunications Services
>University of Kansas
>rpeasah@ku.edu
>(785) 864-9354
>
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