> Sending periodic RAs with the PIO does not help with the two problems that >> were pointed out: >> >> - the network does not necessarily know when a host attaches, because the >> host may timeout sending RSs before the link layer is available to carry >> these RS's up to the node assigning a prefix. As a result the network does >> not know that a host attached, does not allocate a prefix, and cannot send a >> periodic RA that contains the PIO necessary for that hosts to complete >> SLAAC. The hosts ends up with no connectivity. >> > > Correct. There needs to be some work done in BBF to convey the information > about the line coming up from the AN to the Edge Router. > > > Well, actually that work (line up/down info between AN and edge router) has already been done (and in the IETF too) by the ANCP WG. That however by itself is not sufficient, in that there needs to be a destination address of a data plane device eg the MAC of a CPE, to send the RA packets to. An alternative "solution" would naturally be to throw away the regular ethernet forwarding paradigm on an between the Access-Node and Edge Router by inventing and deploy a new dataplane based around forwarding of line-id addresses. At this point one could well say that the cure is worse than the problem it tries to solve...
-Woj.
-------------------------------------------------------------------- IETF IPv6 working group mailing list ipv6@ietf.org Administrative Requests: https://www.ietf.org/mailman/listinfo/ipv6 --------------------------------------------------------------------
