[j-nsp] OSPF LSAs

Stefan Mink mink at schlund.net
Thu Apr 28 04:32:55 EDT 2005


Steven Wong wrote:
> I think it doesn't necessary for a box to send the type5/type7 LSA
> before the ABR gerneate the type 4 LSA. As long as the ABR get a
> router-link with E bit set on the LSA, the ABR will generate the type 4
> LSA towards the other areas. You might want to check the router-link id
> AAA.BBB.CCC.35 within the area 0.0.0.4

good pointer! I obviously assumed to much :]

bits 0x2
-> E bit is set in the type 1 LSA
-> ABRs create type 4 LSAs

so I have to figure out why AAA.BBB.CCC.35 is setting that bit
without advertising a type 5 (I don't use NSSAs) LSA :-/
(or are there constellations where a router advertises itself
  as ASBR without emitting Type 5 LSAs?)

Thanks! :)

    tschuess
              Stefan
--
Stefan Mink, Schlund+Partner AG (AS 8560)
Primary key fingerprint: 389E 5DC9 751F A6EB B974  DC3F 7A1B CF62 F0D4 D2BA
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