[j-nsp] KRT Queue issue (was: Re: bfd = busted failure detection :)

[Richmond, Jeff]

David, did ATAC give any indication if this was a widespread issue over all releases of JUNOS, or are they thinking it is more localized to one more more specific versions? I am still doing a 9.5R3.7 lab evaluation with GRES and NSR on MX960s, and I know we have seen a couple of strange issues that looked to have been related to Logical Systems in conjunction with GRES/NSR, but I want to go back and take a closer look (seem Richard specifically mentioned 9.5R3.7 in one of his earlier emails).

Thanks,
-Jeff
________________________________________
From: juniper-nsp-bounces at puck.nether.net [juniper-nsp-bounces at puck.nether.net] On Behalf Of David Ball [davidtball at gmail.com]
Sent: Thursday, January 07, 2010 9:31 AM
To: Felix Schueren
Cc: juniper-nsp at puck.nether.net; Richard A Steenbergen
Subject: Re: [j-nsp] KRT Queue issue (was: Re: bfd = busted failure     detection :)

  GRES with NSR, yes.  Apparently the stalling has to do with the
master RE not receiving 'ok' from backup RE when it says it has an
update.  It won't install the new route to the forwarding table until
the 'ok' is received from the backup, or similar, based on ATAC's
information.  At any rate, running core dumps went fine last night,
but entire box reset (including SIBs) when GRES and NSR were
deactivated (deactivating/reactivating was supposed to flush the
queue....the outage was obviously not anticipated).

David


2010/1/7 Felix Schueren <felix.schueren at hosteurope.de>:
> David,
>
>>  I'm working with ATAC tonight to get them a running kernel core dump
>> so they can look for root cause, but apparently disabling GRES,
>> committing, re-enabling GRES, and committing again, somehow can
>> temporarily resolve the issue (get the routes installed, I guess
>> ?!?!).  Don't ask me how GRES has anything to do with it....
>>
> is that GRES with or without NSR (nonstop-routing)? It it's with NSR, then I
> could potentially see how this "stalling" might happen.
>
> Kind regards,
>
> Felix
>
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