> On 2015-11-20 15:36, Owen DeLong wrote: >>> On Nov 20, 2015, at 13:35 , Jim Burwell <j...@jsbc.cc> wrote: >>> >>> Hi, >>> >>> Have a simple couple of questions here. >>> >>> In my admittedly cursory glances over the DHCPv6 RFCs, I don't see any >>> reference to the protocol having any role in managing the routing of >>> prefixes it delegates. Perhaps I missed it, but I somewhat expected the >>> omission of this responsibility would be the case. >>> >>> My questions are: >>> >>> 1) Does the DHCPv6 protocol include any standards/mechanisms/methods for >>> managing routes to prefixes it delegates, or does it consider this >>> outside of its function? (I suspect the latter) >> Yes and no… >> >> DHCPv6 doesn’t include anything specifically per se, but it does require that >> the local router sees the DHCPv6 PD answer in the process of passing it >> along to the target, and there’s a pretty obvious expectation that said >> router >> will have to arrange to do the needful in that respect. >> >>> 2) What are the most common ways of managing the routing of delegated >>> prefixes in the ISPs routing domain? Has a standard method/best >>> practice emerged yet? Routing protocols? IPv6 RAs? >> RAs really only apply to subnet local advertisement of routers and >> the on-net prefixes in most implementations. >> >> I don’t think any of the various methods of using routing protocols, >> static pre-routed blocks from which PDs are delegated, etc. could >> necessarily be called “standardized”, but there are probably a few >> that are more popular than most of the others. >> >> Unfortunately, PD is really still in its infancy in terms of development >> and real running code for complete implementations throughout any >> sort of site hierarchy. >> >> Owen >> >> > Thanks for the answer Owen! > > So it sounds like things are still in flux. But it least it answers my > main question of "have I missed something here"? > > Could you elaborate on the "local router seeing the PD answer" a bit? I > presume by "local router" you mean router acting as DHCPv6 relay? Or do > you mean the router which made the original request?
I mean the router that will deliver the PD to the requesting DHCPv6 client. If the DHCPv6 server is on-net, then this will be the requesting client. Otherwise, it will be the last relay router. > Would it be fair to say that the RFCs only really talk about delegating > the prefixes, and leave what to do with the prefixes themselves up to > the implementer? Yes… At least at this time. Some of the work in homenet might include some suggestions for some implementations. > I'm asking these questions because I'm doing a little class for some > folks on IPv6 and this is one area where I couldn't find answers. Depending on your audience, I’d suggest that unless this is an advanced IPv6 class, it’s probably one of those topics left for extra-curicular research. Owen
