From: lucio.galvan@xxxxxxxxxxxxx
Date: Thu Jun 24 1999 - 12:30:09 GMT-3
Hi guys;
I am trying to find the way to propagate external routes (BGP routes
redistributed into OSPF) over a NSSA (this is not allowing external type 5 and
summary also) in both directions as it is depicted in the diagram below:
BGP1-----------r1------area 0-------r2-------nssa
(no-summary)-------r3-------BGP2
The propagation of BGP routes between BGP1 and BGP2 must be done over the OSPF
transit area 0 and the NSSA, but it must be synchronised so BGP routes should b
e
redistributed into OSPF on r1 and r3. r2 the ABR has O N2 (external type 7) BGP
redistributed routes coming from BGP2, so propagation of external routes from r
3
(the stub router) to r2 is done with no problems. r2, the ABR, propagate over
the NSSA a default route 0.0.0.0 to r3. Is this default (present in the interna
l
routing table of r3) enough to propagate the BGP routes coming from r2 to BGP2
in a synchronised way?, It looks like it isn't (although the database of r3 is
showing those routes as external type 7 ), but is there another way to make thi
s
happen. External routes are propagated with no problem from r3 (the stub router
)
to r2 (the ABR router), but could the external route propagation be possible in
the other way?
Your help would be much appreciated.
Regards./ Lucio.
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