From: Sam Joseph (samjoseph747@hotmail.com)
Date: Mon Sep 27 2004 - 09:35:05 GMT-3
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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