Hi Fred, a few comments:
"A host receives on-link prefixes in a Router Advertisement [...] to identify preference order among them" Is there really a preference order? Also I think off-link prefixes are similarly usable for address assignment or DHCPv6, they are simply not "on-link". "apart from the fact that it is emitting Router Advertisements (RAs)." - wasn't there also a router flag in ND at some point? anyway. "One might expect that the routers may or may not receive each other's RAs and form an address in the other router's prefix." Funny enough in theory 4862 says "The autoconfiguration process specified in this document applies only to hosts and not routers." "Since the host derives fundamental default routing information from the RA, this implies that, on any network with multiple prefixes, each prefix SHOULD be advertised by one of the attached routers, even if addresses are being assigned using DHCPv6." Hmm, I don't really see the connection between prefixes and (default) routing information here, since for non source-dest-capable hosts the prefixes do not matter for routing. Or os this sort of a foreshadowing of 6724 Rule 5.5? "A host SHOULD select a "default gateway" for each prefix it uses to obtain one of its own addresses. That router SHOULD be one of the routers advertising the prefix in its RA. As a result of doing so, when a host emits a datagram using a source address in one of those prefixes and has no history directing it otherwise, it SHOULD send it to the indicated "default gateway"." The question is to which one (if there are multiple): this might be important for e.g. fail-over cases or if you want to dynamically optimize away that extra hop you mention. "The direct implication of Section 2 is that routing protocols used in multihomed networks SHOULD be capable of source-prefix based egress routing, and that multihomed networks SHOULD deploy them." This confuses me a bit since Section 2 said "Because there is no routing protocol among those routers" and now suddenly there seems to be one? Cheers, Steven _______________________________________________ homenet mailing list homenet@ietf.org https://www.ietf.org/mailman/listinfo/homenet
