From: phase90@comcast.net
Date: Tue May 10 2005 - 14:42:42 GMT-3
That's true there was a bug which would cause what they called
a "wedged" interface. That's where the size goes above the max.
It could also happen with poorly tuned interface buffers in an image
without the bug. If the image doesn't have the bug, Cisco reccomends call them to assist in adjusting the interface and / or global buffers.
Jerry
-------------- Original message --------------
> I seem to recall a bug a while back that malformed packets could fill up
> the input queue and stop the router from processing IP Input. Are you
> running a deferred release? If so check the release notes to see why it
> was deferred.
>
> Brian McGahan, CCIE #8593
> bmcgahan@internetworkexpert.com
>
> Internetwork Expert, Inc.
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>
> > -----Original Message-----
> > From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On Behalf
> Of El
> > ayachi HADEK
> > Sent: Tuesday, May 10, 2005 12:14 PM
> > To: ccielab@groupstudy.com
> > Subject: input queue increasing
> >
> > Hi,
> > In my router are terminated several tunnels ( GRE) and tunnels over
> > tunnels.
> > The FastEthernet0/0 interface has stopped forwarding traffic (and ospf
> > became down). By looking to the show interface, I have noticed that
> the
> > input queue is 80/75/1501/0 (size/max/drops/flushes). To resolve this,
> I
> > have issued the interface command hold-queue 1000 in and now
> hold-queue
> > 4096 in with is the maximum allowed.
> > Now, and without traffic in tunnel interfaces, the input queue is
> stucked
> > in
> > 1809.
> > Explanations!
> >
> > FastEthernet0/0 is up, line protocol is up
> > Hardware is AmdFE, address is 0030.9475.5e40 (bia 0030.9475.5e40)
> > Internet address is 172.29.1.1/24
> > MTU 1500 bytes, BW 100000 Kbit, DLY 100 usec,
> > reliability 255/255, txload 1/255, rxload 1/255
> > Encapsulation ARPA, loopback not set
> > Keepalive set (10 sec)
> > Full-duplex, 100Mb/s, 100BaseTX/FX
> > ARP type: ARPA, ARP Timeout 04:00:00
> > Last input 00:00:00, output 00:00:00, output hang never
> > Last clearing of "show interface" counters 01:52:16
> > Input queue: 1809/4096/0/0 (size/max/drops/flushes); Total output
> drops:
> > 0
> > Queueing strategy: fifo
> > Output queue: 0/40 (size/max)
> > 5 minute input rate 95000 bits/sec, 75 packets/sec
> > 5 minute output rate 88000 bits/sec, 70 packets/sec
> > 513705 packets input, 73581167 bytes
> > Received 49046 broadcasts, 0 runts, 0 giants, 0 throttles
> > 0 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored
> > 0 watchdog
> > 0 input packets with dribble condition detected
> > 484988 packets output, 65962058 bytes, 0 underruns
> > 0 output errors, 0 collisions, 0 interface resets
> > 0 babbles, 0 late collision, 0 deferred
> > 0 lost carrier, 0 no carrier
> > 0 output buffer failures, 0 output buffers swapped out
> >
> >
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