[j-nsp] MX NSR issue

[Chris Evans]

My re totally failed.   Luckily this is in my lab so we can hopefully get
some info. I'm not rebooting it until I have an answer.
> On Thu, Sep 02, 2010 at 09:15:18AM -0400, Chris Evans wrote:
>> #2 - I'm using IRB interfaces on the MX platform. After the failover,
>> traffic will not forward.. You can communicate RE to host, but HOST to
HOST
>> on the same box or external<>HOST connectivity is broken.
>
> I've seen this behavior about a dozen times over the years, but always
> on production boxes where we don't have the luxury of leaving it in a
> broken state for Juniper to look at it. We've tried opening cases, but
> they never find anything after the fact, so they just give up and close
> the case.
>
> Try rebooting the backup RE and see if traffic starts forwarding while
> it is offline, then breaks again when it comes back up. If that works,
> try disabling GRES and see if that stops the blackholing. In my previous
> encounters with it, it will start blackholing again if you turn GRES
> back on afterwards, but will clear up if you reboot or non-GRES
> switchover to the other RE.
>
> --
> Richard A Steenbergen <ras at e-gerbil.net> http://www.e-gerbil.net/ras
> GPG Key ID: 0xF8B12CBC (7535 7F59 8204 ED1F CC1C 53AF 4C41 5ECA F8B1 2CBC)