I'd say you have a lot of traffic with TTL 1 or a link-local multicast address on the interface, if everything else is working correctly. Otherwise you are process switching a lot of traffic.
Here are some pointers: http://www.cisco.com/en/US/products/hw/routers/ps133/products_tech_note09186 a0080094791.shtml But, I would say that you have something like "no ip route-cache" configured on the interface. You say it is a LAN interface, you talk about MPLS, are there multiple LDP relationships on this interface, are you running RSVP for TE on a LAN Segment? David -- http://dcp.dcptech.com > -----Original Message----- > From: Farooq Razzaque [mailto:[email protected]] > Sent: Tuesday, September 13, 2011 11:18 AM > To: [email protected]; [email protected] > Cc: [email protected] > Subject: RE: [c-nsp] Input errors, overrun & unknown protocols drops on > LAN interface > > Dear David > > Please find the resule of show buffer. can u pls analyse and help > > > > <http://www.flamingtext.com/hmail.html> > > > > > > > ________________________________ > > From: [email protected] > To: [email protected]; [email protected] > CC: [email protected] > Subject: RE: [c-nsp] Input errors, overrun & unknown protocols drops on > LAN interface > Date: Tue, 13 Sep 2011 20:49:14 +0600 > > > 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. > > > > <http://www.flamingtext.com/hmail.html> > > > > > > > > From: [email protected] > > To: [email protected]; [email protected] > > CC: [email protected] > > 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: [email protected] [mailto:cisco-nsp- > > > [email protected]] On Behalf Of Farooq Razzaque > > > Sent: Tuesday, September 13, 2011 9:18 AM > > > To: [email protected] > > > Cc: [email protected] > > > 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: [email protected] > > > > Date: Tue, 13 Sep 2011 14:04:57 +0100 > > > > CC: [email protected]; [email protected] > > > > To: [email protected] > > > > > > > > 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: [email protected] > > > > >> To: [email protected] > > > > >> CC: [email protected] > > > > >> 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 > > > > > > > > > > _______________________________________________ > > > > > cisco-nsp mailing list [email protected] > > > > > https://puck.nether.net/mailman/listinfo/cisco-nsp > > > > > archive at http://puck.nether.net/pipermail/cisco-nsp/ > > > > > > > > > > _______________________________________________ > > > cisco-nsp mailing list [email protected] > > > https://puck.nether.net/mailman/listinfo/cisco-nsp > > > archive at http://puck.nether.net/pipermail/cisco-nsp/ > > _______________________________________________ cisco-nsp mailing list [email protected] https://puck.nether.net/mailman/listinfo/cisco-nsp archive at http://puck.nether.net/pipermail/cisco-nsp/
