Manish, Have you read the series of articles I wrote on OSPF LSA types?
http://blog.ipexpert.com/2010/08/11/quick-look-into-ospf-database-router-lsa/ http://blog.ipexpert.com/2010/09/13/quick-look-into-ospf-database-network-lsa/ http://blog.ipexpert.com/2010/09/15/quick-look-into-ospf-database-summary-lsa/ http://blog.ipexpert.com/2010/09/22/quick-look-into-ospf-database-external-and-asbr-summary-lsa/ http://blog.ipexpert.com/2010/09/27/quick-look-into-ospf-database-nssa-external-lsa/ There's also a pretty good series written by Joe Astorino on our blog that talks specifically about Type 4 LSA: http://blog.ipexpert.com/2009/11/04/ospf-type-4-lsa-the-forward-address-part-1/ http://blog.ipexpert.com/2009/11/11/ospf-type-4-lsa-the-forward-address-part-2/ -- Marko Milivojevic - CCIE #18427 (SP R&S) Senior CCIE Instructor - IPexpert On Tue, Aug 14, 2012 at 6:40 AM, MANISH <[email protected]> wrote: > Hi All, > > can some one please explain me the difference in LSA Type 3 and LSA Type 4 > > as per my understanding > > LSA Type 3 is used for inter area routes ........meaning all the Type 1/2 > inside an area when crosses in to other area will be advertised using type > 3 > > LSA Type 4 is the IP address of ASBR. > > my confusion is if we already know about ip add of ASBR through Type 3 > since every thing gets flooded in to other areas why do we need type 4 > explicitly to define ip add of ASBR. > > > I read many blogs and other sources but still could not undersdtand. > > take a look at this blog explanation, will fa0/0 of R6 not be known to > other areas using type 3 lsa ? > > http://blog.ipexpert.com/2009/11/04/ospf-type-4-lsa-the-forward-address-part-1/ > > > > Thank You. > Manish > _______________________________________________ > For more information regarding industry leading CCIE Lab training, please > visit www.ipexpert.com > > Are you a CCNP or CCIE and looking for a job? Check out > www.PlatinumPlacement.com > > http://onlinestudylist.com/mailman/listinfo/ccie_rs _______________________________________________ For more information regarding industry leading CCIE Lab training, please visit www.ipexpert.com Are you a CCNP or CCIE and looking for a job? Check out www.PlatinumPlacement.com http://onlinestudylist.com/mailman/listinfo/ccie_rs
