Do a show controller Gi0/1 | i rx_resource Chances are the input error count is the same as the rx_resource_error count
This is a microburst issue, and sadly, I know of no way to get around it, the only solution is buying a router that is able to handle wirespeed Gig BR, Sibbi > From: Ivan Gasparik <i...@ig.sk> > Date: Fri, 13 Nov 2009 10:50:05 +0100 > To: <cisco-nsp@puck.nether.net> > Subject: Re: [c-nsp] Gigabit Interface Input Errors > > Hi folks, > > Does anybody know what causes the router to drop packets as > overrun and what as an input queue drops. There are two show interface > examples of NPE-G1, both with input hold-queue set to 4096. The first > one only shows 153 overrun packets, in the second interface output > you can see overruns together with input queue drops: > > GigabitEthernet0/1 is up, line protocol is up > ... > Input queue: 0/4096/0/58537 (size/max/drops/flushes); Total output drops: 0 > Queueing strategy: fifo > Output queue: 0/4096 (size/max) > 1 minute input rate 43040000 bits/sec, 6944 packets/sec > 1 minute output rate 23483000 bits/sec, 7180 packets/sec > 2609205324 packets input, 3131277093 bytes, 6 no buffer > Received 2871721 broadcasts (0 IP multicasts) > 0 runts, 0 giants, 2 throttles > 153 input errors, 0 CRC, 0 frame, 153 overrun, 0 ignored > 0 watchdog, 2871721 multicast, 0 pause input > > GigabitEthernet0/3 is up, line protocol is up > ... > Input queue: 0/4096/4258004/961350 (size/max/drops/flushes); Total output > drops: 44638280 > Queueing strategy: Class-based queueing > Output queue: 6/4096/0 (size/max total/drops) > 1 minute input rate 15685000 bits/sec, 5120 packets/sec > 1 minute output rate 28836000 bits/sec, 5171 packets/sec > 2503236491 packets input, 208082741 bytes, 589462 no buffer > Received 1329388071 broadcasts (13 IP multicasts) > 0 runts, 12 giants, 960 throttles > 128042 input errors, 12 CRC, 0 frame, 128018 overrun, 0 ignored > 0 watchdog, 1424143105 multicast, 0 pause input > > Thanks > Ivan > > > On Thursday 05 November 2009 21:38:53 Gert Doering wrote: >> Hi, >> >> On Thu, Nov 05, 2009 at 01:41:16PM -0500, Drew Weaver wrote: >>> Does anyone have any tips on finding out what is causing it to >>> overrun? >> >> "Hardware too slow error" - packets arrive in short bursts at line rate, >> and your router cannot handle that. >> >> For example, an NPE-G1 will handle packets at, say, 300 mbit/sec if they >> come in evenly spaced - packet<pause>packet<pause>packet<pause> - but if >> 1000 packets arrive back-to-back and then a longer pause, it will >> overrun the buffers. >> >> There's not much you can do, except "get a hardware forwarding box" >> or "just accept it, and only worry if the errors increase more >> frequently". >> >> We do some of both :-) >> >> gert >> > _______________________________________________ > cisco-nsp mailing list cisco-nsp@puck.nether.net > https://puck.nether.net/mailman/listinfo/cisco-nsp > archive at http://puck.nether.net/pipermail/cisco-nsp/ _______________________________________________ cisco-nsp mailing list cisco-nsp@puck.nether.net https://puck.nether.net/mailman/listinfo/cisco-nsp archive at http://puck.nether.net/pipermail/cisco-nsp/