> Yes, so if we allow the mixed behavior, then it is probably reasonable > to allow the node to accept RAs on a "host" interface and to configure > default routers on that interface. My point is that we should > *explicitly* note that the rule for the multi-interfaced hosts also > applies to the host-side interfaces on a mixed-behavior node.
But it would be odd to do that only for the mixed case. We have this discrepancy between 2461 and relality for the host case already so shouldn't we also then explicitly note that the rule for the multi-interfaced hosts apply to the multi-interfaced hosts? I think the right solution is to fill in the gap between 2461 and reality where in reality implementations handle multiple interfaces yet 2461 is silent on the issue (except saying that everything is maintained per interface). I sure don't know of an implementation which has a per-interface default router list. So without a specification that covers multi-interfaced hosts I don't see how we can effectively build upon the multi-interfaced hosts behavior to create multi-interfaced mixed-mode behavior; we do not have a stable foundation to do this. Which is why I think 2461bis should - state that because the protocol operates separately per interface there is nothing which precludes a node from being a router on some interfaces and a host on other interfaces. But that there are significant issues, all out of scope, terms of building such mixed mode nodes. - (optionally) Create an appendix, akin to appendix A for hosts, which state the known issues for mixed-mode nodes. Then separately, if folks want to work on multi-interfaced hosts (which I think would be important given the discrepancy between reality and RFC 2461), that could be done as a separate short specification. Likewise if folks want to specify more of the issues about mixed-mode nodes and/or offer solutions to them, that should be a separate specification. Erik -------------------------------------------------------------------- IETF IPv6 working group mailing list [EMAIL PROTECTED] Administrative Requests: https://www1.ietf.org/mailman/listinfo/ipv6 --------------------------------------------------------------------
