Hi, I was just wandering whether there are some special cases where Type-4 ASBR summary LSAs are needed -and if they are needed at all?
Fact is Type-4 LSAs are only advertised by ABRs to all their regular areas including BB-area (omitting stub-kind of areas) What I have noticed though is that if the ABR happens to be an ASBR as well -it won't advertise itself as ASBR -will not send Type-4 LSA So I have created a setup with area 0 and area 1 with one ABR between them and on that ABR I redistributed one of my connected loopbacks Routers within area 0 and routers within area 1 only had type-5 lsa with the external network but no type-4 lsa saying who the ASBR is The ping worked as I thought The point is advertising router id is in Type-5 LSA anyway making it clear who's the ASBR So why all the ABRs have to mention it redundantly in Type-4 LSA? Adam Vitkovsky CCIP(r) CCNP(r) certified System Engineer | AT&T Business Solutions - Global Customer Service Phone: +421-269-257-375 Email: [email protected]<mailto:[email protected]> "This message and any attachments to it contain confidential business information intended solely for the recipients. If you have received this email in error please do not forward or distribute it to anyone else, but email me to report the error, and then delete this message from your system."
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