I have the following question regarding Next-hop attribute that I'm still a little bit confused. Assuming router A is in AS 1, and router B and C are in AS 2. Routers A and B are EBGP peers. Which of following are true? A) When router B advertises to router A a route to router C, it will in all circumstances list itself as the next-hop. B) If router B advertises to router A a route that can be more directly reached through router C, it will list router C as the next-hop if A, B and C are all on the same boradcast medium (e.g. Ethernet). C) If router B advertises to router A a route that can be more directly reached through router C, it will list router B as the next-hop if A, B, and C are all on the same NBMA medium (e.g. Frame Relay) because router A and C might not have direct connectivity. D) If router B advertises a route to router A that can be more directlyreached through router C, it will list router C as the next-hop if A, B and C are all on the same NBMA medium (e.g. Frame Relay) regardless of whether router A and C have connectivity. I understand that D is correct - as on a NBMA medium (with both Router A and Router B are EBGP), that when router B tries to advertise a router to Router A (EBGP) of route to Router C, Router B will automatically list Router C as next-hop, regardless of whether Router A can see Router C. But I also choose A. Following your explanations, when EBGP neighbor forwards routing info. to another EBGP neighbor, it will change the next-hop to itself, which means Router B will list itself as next-hop, but the answer is B and D, why?? Thanks again so much for your help. Regards, Hunt Lee Message Posted at: http://www.groupstudy.com/form/read.php?f=7&i=849&t=849 -------------------------------------------------- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
