At 7:40 PM +0000 12/13/02, Priscilla Oppenheimer wrote: >[EMAIL PROTECTED] wrote: >> >> As EIGRP only looks at incoming hello packets (EIGRP type 5 >> packets) to keep >> a peer neighbor relationship up on a particular side of a >> routed link., this >> can be a prime issue for "black hole" routing issues. >> >> OSPF adjacencies are bi-directional. Makes more sense. >> >> Why was EIGRP designed this way? > >Simplicity?? Less network traffic? > >But I question your premise. EIGRP wouldn't send to a neighbor that wasn't >feasible, would it? Is EIGRP really more susceptible to black holes than >OSPF? Maybe I'll rattle some experts and we'll get a good discussion going >on this. :-) > >Priscilla
My first thought is that it might be to allow for asymmetric forwarding (in other words, the router forming the adjacency is not the appropriate next hop. Also remember that EIGRP, as opposed to OSPF, can have different hello and other timers on both ends of the adjacency. Unidirectional adjacencies probably would be the simplest way to implement this. Message Posted at: http://www.groupstudy.com/form/read.php?f=7&i=59195&t=59186 -------------------------------------------------- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
