[j-nsp] NSR interfering with OSPF?

[David Ball]

  I've been getting them for ages (retransmits), both for my core OSPF
sessions and OSPF sessions in a customer's VRF.  I have yet to
experience any problems with this, and I think I once talked to JTAC
about it, but can't for the life of me find the conversation.  This is
on T-series running an SR version of 9.2 with NSR and GRES.
  I'd be interested in hearing the outcome of yours, though, as I seem
to remember it being relatively benign.

David


On 5 February 2010 09:42, Justin M. Streiner <streiner at cluebyfour.org> wrote:
> I'm running into an issue on an M10i running JUNOS 8.5R4.3 where when I
> enable Nonstop Active Routing, it seems to interfere with OSPF's ability to
> flood link-state updates to its neighbors.  When I enabled NSR on this
> router, I started getting alarms in my management system that it was
> re-transmitting link-state updates, and when I disabled NSR, the alerts went
> away.  It appears that when this happens, the router will revert to sending
> link-state updates via unicast to maintain the integrity of the link-state
> database, though it still issues alerts when it does so.
>
> I have a case open with JTAC, but I haven't gotten much traction on it yet.
>  Has anyone else here run into this or something similar?
>
> jms
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