[c-nsp] CEF fun in SXF

[Saku Ytti]

On (2005-12-08 22:24 +0100), Gert Doering wrote:
 
> *All* directly connected (!) customers had massive packet loss - about 
> 50-80% - while packets to non-"connected" targets had no problems at all.

 When you see something like this in PFC boxes odds are FIB is not
syncronized between PFC and MSFC. When there is no route in PFC,
PFC punts packet to MSFC ratelimited to ~300pps or so, so that MSFC
can generate proper ICMP message. However, if MSFC happens to have
proper route, traffic is switched correctly by it (all the 300pps
that have succeededly being punted, instead dropped in hardware)

 What I'd suggest that you do is take 'show mls cef' and 'sh ip cef',
take just the prefix part of the output, sort, uniq -c and print
all lines that were found only once, these routes are missing in PFC
and should have above problem.
 We've seen this issue in several 7600's IOS', but for us it's gone
since SXE3.

-- 
  ++ytti