On Tue, 2006-09-05 at 21:48 -0700, Soliman, Hesham wrote: > > > Hello, > > I couldn't understand why NUD is the responsibility of IP, > > but the other is not. > > > > So, why NUD isn't the link-layer's responsibility? > > => Because of two reasons: > - Some link layers fon't have this connection-oriented service and > therefore do not do NUD. > - NUD tests reachability of the IP peer not the link layer peer. Since > there can be multiple link layers between two peers, relying on link > layers in not useful to IP. > > But I certainly don't expect NUD to test every channel within a link > layer, it's not a useful mechanism anyway because testing the traffic > channels does test general reachability of the physical media.
Thanks. But I still believe that a host should be able to test if it is reachable in dormant mode (reachable, or reachable within reasonable delay). This is good for dormant mode security. Using unsolicited RAs is one possibility. There may be others. (this means that I'm neutral in this discussion, and the commercial operator doesn't really care :-) pars > Hesham > > > > > Thanks, > > pars > > > > > > > > > > > Hesham > > > > > > > > > -------------------------------------------------------------------- > > IETF IPv6 working group mailing list > > [email protected] > > Administrative Requests: https://www1.ietf.org/mailman/listinfo/ipv6 > > -------------------------------------------------------------------- > > -------------------------------------------------------------------- IETF IPv6 working group mailing list [email protected] Administrative Requests: https://www1.ietf.org/mailman/listinfo/ipv6 --------------------------------------------------------------------
