On Fri, Apr 3, 2009 at 2:04 PM, Scott Brim <[email protected]> wrote: > Excerpts from William Herrin on Fri, Apr 03, 2009 01:04:26PM -0400: >> On Fri, Apr 3, 2009 at 11:21 AM, Scott Brim <[email protected]> >> wrote: >> > A locator names a point of attachment at a given layer. If an >> > endpoint changes its points of attachment at that layer, >> > associations between the endpoint and locators will change. > >> A locator names a point of attachment within the scope of the >> network topology for which the locator is used. If an endpoint >> changes its points of attachment within that scope, associations >> between the endpoint and locators will change. > > I'm having trouble deciding what that means, and I'm enthusiastically > trying, so I'm sure others will have even more trouble. :-p'
Hi Scott, Your version sets the scope at the network layer boundary. The locator changes with my attachment at the layer boundary. But that's not right. The scope is arbitrary. Protocol and design-dependent. For example, I send a packet to 1.2.3.4 using a loose source route via 5.6.7.8. 5.6.7.8 is a locator. 5.6.7.8 serves as 1.2.3.4's point of attachment to the larger network. Once my packet gets to one of the routers which accepts packets to 5.6.7.8, the 5.6.7.8 locator loses scope and delivery proceeds based on the 1.2.3.4 address. But there's no layer change. Regards, Bill Herrin -- William D. Herrin ................ [email protected] [email protected] 3005 Crane Dr. ...................... Web: <http://bill.herrin.us/> Falls Church, VA 22042-3004 _______________________________________________ rrg mailing list [email protected] http://www.irtf.org/mailman/listinfo/rrg
