This is probably CSCdr91482.
If you attach to the LC and do a debug ip cef drops -- which will
probably crash the LC :( you'll see various packets being dropped
like spanning tree BPDU's that should of been silently ignored.
On Sun, Jul 23, 2000 at 10:53:29PM -0400, Martin, Christian wrote:
> Is there a way to tune input buffers to allocate more SRAM for small packets
> on GSR linecards? I am seeing large input-queue drops, and it would appear
> that it is due to the size of the packets and the rate. As of now, it is at
> about 17000 pps. Mostly HTTP GETs and the like. It may also be some kind
> of forwarding failure, based on IP traffic stats. Is there a way to tell
> why a packet is dropped from the queue aside from debugs?
>
> TIA,
> chris
>
>
> IP statistics:
> Rcvd: 3975172550 total, 584081420 local destination
> 240 format errors, 0 checksum errors, 234576 bad hop count
> 1 unknown protocol, 0 not a gateway
> 0 security failures, 0 bad options, 170284 with options
> Sent: 14320939 generated, 3316033905 forwarded
> Drop: 1915695 encapsulation failed, 173714 unresolved, 0 no adjacency
> 73456081 no route, 0 unicast RPF, 247674 forced drop
>
> Last clearing of "show interface" counters 2d11h
> Queueing strategy: fifo
> Output queue 0/4096, 0 drops; input queue 0/4096, 120468 drops
> 10 minute input rate 28506000 bits/sec, 17099 packets/sec
> 10 minute output rate 137568000 bits/sec, 17533 packets/sec
mark
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