On Fri, Jul 4, 2008 at 9:10 PM, Tony Li <[EMAIL PROTECTED]> wrote: > And more specifically, how does the last hop router determine the MAC > address of the final destination? The MAC address itself is a flat > identifier (and locator on the last hop) that can be embedded in the > endpoint identifier, or the endpoint identifier can be used for a lookup to > determine the MAC address. In either case, the endpoint identifier ends up > being used for a local routing decision.
The MAC address is strictly a locater. Depending on which interface you approach the host from it usually has a different MAC addresses. The routing system doesn't care. On the last hop, it uses the layer 3 locater as a key to find a layer-2 locater. -Bill -- William D. Herrin ................ [EMAIL PROTECTED] [EMAIL PROTECTED] 3005 Crane Dr. ...................... Web: <http://bill.herrin.us/> Falls Church, VA 22042-3004 -- to unsubscribe send a message to [EMAIL PROTECTED] with the word 'unsubscribe' in a single line as the message text body. archive: <http://psg.com/lists/rrg/> & ftp://psg.com/pub/lists/rrg
