On Tue, 2006-09-05 at 08:22 -0700, Soliman, Hesham wrote: > > I wasn't assuming this. > > > > NUD checks the traffic channel in both directions. That's OK. > > But after the NUD procedure, the host enters dormant mode and > > becomes reachable via another channel: the paging channel that > > wasn't tested. > > > > Consequently, the following scenario is possible: > > > > 1. Host performs NUD. Result is OK. > > 2. Host enters dormant mode. > > 3. There is an incoming call, but the paging channel is down. > > 4. The host can't be reached. > > > > NUD reported good reachability, but the host missed the call. > > Because NUD didn't test the paging channel (it can't). > > => As you say above, "it can't (test the paging channel)". I don't think > it's the responsibility of the IP layer to test signalling channels > really. The paging channel is not a different physical medium and its > failure (given the reachability on traffic channels) is not due to > physical unreachability. Therefore, IMHO it is the responsibility of the > link layer to work this out.
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? Thanks, pars > Hesham > -------------------------------------------------------------------- IETF IPv6 working group mailing list ipv6@ietf.org Administrative Requests: https://www1.ietf.org/mailman/listinfo/ipv6 --------------------------------------------------------------------
