[c-nsp] ospf nssa ibgp problem

Jon Lewis jlewis at lewis.org
Mon Oct 16 14:40:51 EDT 2006


On Mon, 16 Oct 2006, Bruce Pinsky wrote:

> So the 7206 is in the NSSA and receiving routes from an RR that is in area
> 0?  If that is the case, how will the 7206 learn the nexthops for the BGP
> routes since the ABR will only be generating default into the NSSA?  It
> would explain the oscillating behavior since every 60 seconds bestpath
> would run and find that there is not an explicit route to the nexthops.

Yeah, I see that's a problem now.  I was mistaken about what no synch 
actually did, and I'm a little surprised it installed the BGP routes into 
the table at all.  Had it refused to do so, I probably would have realized 
my error sooner.

----------------------------------------------------------------------
  Jon Lewis                   |  I route
  Senior Network Engineer     |  therefore you are
  Atlantic Net                |
_________ http://www.lewis.org/~jlewis/pgp for PGP public key_________


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