Re: [RRG] Re: Should the identifier be used as local locator

["William Herrin" <bill@herrin.us>]

On Fri, Jul 4, 2008 at 9:10 PM, Tony Li <tony.li@tony.li> 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 ................ herrin@dirtside.com bill@herrin.us
3005 Crane Dr. ...................... Web: <http://bill.herrin.us/>
Falls Church, VA 22042-3004

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