[c-nsp] Input errors, overrun & unknown protocols drops on LAN interface

[Farooq Razzaque]

Dear David
 
I increased the hold on Queue to size 3500 but the input error and input queue drops are there . May be the frequency of increasing is reduced but it is still there.



 


 


> From: dcp at dcptech.com
> To: farooq_mcp at hotmail.com; david.rothera at gmail.com
> CC: cisco-nsp at puck.nether.net
> Subject: RE: [c-nsp] Input errors, overrun & unknown protocols drops on LAN interface
> Date: Tue, 13 Sep 2011 09:40:49 -0400
> 
> To minimize the input drops you can increase the hold-queue. Another issue
> to look at is the buffers as well, most likely have misses and failures
> there. The flushes are caused by SPD, which are control plane packets that
> need to make it to the processor so they are put ahead of everything else in
> the input queue.
> 
> David, a different one.
> 
> --
> http://dcp.dcptech.com
> 
> 
> > -----Original Message-----
> > From: cisco-nsp-bounces at puck.nether.net [mailto:cisco-nsp-
> > bounces at puck.nether.net] On Behalf Of Farooq Razzaque
> > Sent: Tuesday, September 13, 2011 9:18 AM
> > To: david.rothera at gmail.com
> > Cc: cisco-nsp at puck.nether.net
> > Subject: Re: [c-nsp] Input errors, overrun & unknown protocols drops on
> > LAN interface
> > 
> > 
> > Dear David
> > 
> > How can we resolve this then
> > 
> > 
> > 
> > 
> > 
> > 
> > 
> > 
> > 
> > > Subject: Re: [c-nsp] Input errors, overrun & unknown protocols drops
> > on LAN interface
> > > From: david.rothera at gmail.com
> > > Date: Tue, 13 Sep 2011 14:04:57 +0100
> > > CC: nick at foobar.org; cisco-nsp at puck.nether.net
> > > To: farooq_mcp at hotmail.com
> > >
> > > Input drops are usually caused by the input queue filling up and then
> > tail drops occurring because there is no more space for new packets in
> > the queue.
> > >
> > > I've seen this happen where you have an upstream device trying to
> > send packets faster than the downstream device can process them.
> > >
> > >
> > > On 13 Sep 2011, at 13:54, Farooq Razzaque wrote:
> > >
> > > >
> > > > Dear Nick
> > > >
> > > > Thanks for your reply.
> > > >
> > > > What does input error means ?
> > > >
> > > > I am also having the drops in Input queue
> > > >
> > > >
> > > >
> > > > Input queue: 0/75/3267688/769 (size/max/drops/flushes); Total
> > output drops: 0
> > > >
> > > >
> > > >
> > > >
> > > >
> > > >
> > > >> Date: Tue, 13 Sep 2011 12:18:05 +0100
> > > >> From: nick at foobar.org
> > > >> To: farooq_mcp at hotmail.com
> > > >> CC: cisco-nsp at puck.nether.net
> > > >> Subject: Re: [c-nsp] Input errors, overrun & unknown protocols
> > drops on LAN interface
> > > >>
> > > >> On 13/09/2011 10:13, Farooq Razzaque wrote:
> > > >>> I am facing the input errors, overrun & unknown protocols drops
> > on LAN
> > > >>> interface-Gi0/0 (having sub-interface) on MPLS router.
> > > >>
> > > >> port overruns mean that your router is receiving data faster than
> > it can
> > > >> handle. You either need a faster router than a 3800 series or else
> > larger
> > > >> input buffers.
> > > >>
> > > >> Unknown protocols means that your switch is sending data that the
> > router
> > > >> doesn't understand. Maybe LLDP or something? Or some other odd LAN
> > protocol?
> > > >>
> > > >> Nick
> > > >
> > > > _______________________________________________
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> > >
> > 
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