The type5 LSA points to the RID of the ASBR, which technically is a 32 bit number and not an IP address, so the ASBR may not be reachable by its RID.
-------- Original Message -------- Subject: [OSL | CCIE_RS] OSPF LSA Type 3 and Type 4 Confusion ? From: MANISH <[email protected]> Date: Tue, August 14, 2012 9:40 am To: [email protected] 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
