06-02-2009 06:35 AM - edited 03-04-2019 04:57 AM
All,
I've attached a diagram for something that I ran into this morning. I have 2 ospf areas, one of which is an nssa, and I have a RIP router behind the nssa. I noticed that the same route that RouterB seen as an N2 route, RouterA sees as an E2 route. Is this because the ASBR is converting Type-7 LSA into a Type-5, and then RouterA is receiving the Type-5 LSA marking it as an external route, but not necessarily known that it came from an NSSA?
Thanks,
John
Solved! Go to Solution.
06-02-2009 07:10 AM
To reiterate, Router A is not part of the NSSA so it will receive external routes as E1 or E2.
Router C is part of the NSSA (Area 1), so any external routes from a ASBR on that area (on this case router B) will be seen as N1 or N2.
HTH,
__
Edison.
06-02-2009 06:39 AM
John,
I don't see any diagram but if Router A is receiving this LSA via a regular area, it will see any external route as E2 instead of N2.
N2 LSAs will only be seen within the NSSA area.
HTH,
__
Edison.
06-02-2009 06:46 AM
06-02-2009 07:10 AM
To reiterate, Router A is not part of the NSSA so it will receive external routes as E1 or E2.
Router C is part of the NSSA (Area 1), so any external routes from a ASBR on that area (on this case router B) will be seen as N1 or N2.
HTH,
__
Edison.
06-02-2009 07:12 AM
Thanks! =)
John
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