RE: OSPF - Type 4 [7:36358]

Hi Venkat, both type 3 and type 4 are generated by Area Border routers. Type 3 describes routes to networks, also used for aggregating routes. Type 4 describes routes to ASBR. Summary Links (type 3) are identified by the IP network numbers of the destinations they are pointing at. ASBR Summary

RE: OSPF - Type 4 [7:36358]

- Type 4 [7:36358] Hi all, I was wondering what is the use of type 4 LSA when the reachability to ASBR is possible using the Type 3 LSA information. Also I would like to know whether Type 4 is flooded into a Stub area. Can someone clarify. Regards -Venkat

RE: OSPF - Type 4 [7:36358]

Type 3 LSA are advertised by all ABR. Type 4 and 5 LSA are advertised by ASBR. Type 4 is used to identify the ASBR and Type 5 is used to get information from the ASBR. Stub area blocks Type 4 and Type 5 LSA from propagating into that area. Also Type 4 and Type 5 are not allowed to propagate

OSPF - Type 4 [7:36358]

Hi all, I was wondering what is the use of type 4 LSA when the reachability to ASBR is possible using the Type 3 LSA information. Also I would like to know whether Type 4 is flooded into a Stub area. Can someone clarify. Regards -Venkat