Hi there,
LSA type 4 are used between areas to notify other routers how to get
to a certain ASBR. The LSA type 5 simply tells all routers (at least in
any not stubby areas) that an external route is present. All routers in
Area 0, knows how to get to R5 because they are in the same area, so
there is no need to create a LSA type 4.
Sincerely,
Kim Pedersen
Michael Lipsey wrote:
I'm trying to work these things out...
My basic topology is this:
R1 -- R2 -- R4 -- R5
Between R1/R2 is Area 0
Between R2/R4 is Area 0
Between R4/R5 is Area 0
R5 has loopback5 in Area 5
R5 has Loopback55 in Eigrp, this is redistributed into OSPF Making R5 and
ASBR (and an ABR since it has both Area 0 and Area 5).
My OSPF database at this point does not show a Type 4 LSA for R5 in any of
my routers.
I add a loopback to R1 in area 1 and all of a sudden I have a Type 4 LSA for
R5.
Why doesn't the Type 4 LSA show up just after the redistribution?
The Redistributed route does show up as a Type 5 LSA once it is
redistributed (as expected).
I hope my question comes out clear enough, if need be I can post the
configurations and the ip ospf database output.
-Mike
--
// Freedom Matters
// Follow my progress on: http://kpjungle.wordpress.com
