[nsp] GSR GE-LC Input Queuing

From: Martin, Christian (CMartin@mercury.balink.com)
Date: Sun Jul 23 2000 - 22:53:29 EDT


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



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