[c-nsp] FIB insertion issues on Sup2T routers

[Jeroen van Ingen]

Hi,

Never feels good when you can't find a good explanation / do proper RCA 
for an incident...

And you don't have any active support on the boxes? If you hit it again, 
let us know; we're running a couple of Sup2T-XL too.

Regards,

Jeroen van Ingen
ICT Service Centre
University of Twente, P.O.Box 217, 7500 AE Enschede, The Netherlands


On 02-01-18 14:51, "Rolf Hanßen" wrote:
> Hello,
> 
> on router #1 it happened again.
> We then updated it to 15.2(1)SY5 (put luck) on Dec 6th and configured
> prefix limits on all sessions allowing less tha 100k above current count.
> 
> On router #2 we did nothing.
> 
> Router #3 was false positive, issue did not occur at all (human error).
> 
> Nothing happened since the updates, no insertion issue, no prefix count hit.
> So we have no clue what happened.
> 
> kind regards
> Rolf
> 
>> Hi,
>>
>>> I had 3 incidents within a week in which Sup2T-XL routers switched to
>>> software forwarding.
>>>
>>> I.e. log says:
>>> %MLSCEF-4-FIB_TCAM_INSERT_FAIL: FIB entry insertion into tcam failed,
>>> one
>>> IPv4 route may be absent from hardware table
>>
>> Haven't seen this one, but I'm interested to hear whether you've had new
>> occurrences... We're running newer code though, 15.2(1)SY5 currently,
>> because of several bugs in earlier releases.
>>
>>
>> Regards,
>>
>> Jeroen van Ingen
>> ICT Service Centre
>> University of Twente, P.O.Box 217, 7500 AE Enschede, The Netherlands
>>
> 
>