Hi Ole,
you could use hierarchical PD, just that it doesn't work well with:
- networks with loops
- multi-homed networks
and it is quite wasteful with regards to subnet space.
ND proxy fails in any topology with a loop.
Yes but I expect loops not to happen in practice or people that build
loops to know how to take care of them.
Nevertheless taking into account the issues I mention below hierarchical
PD still sounds to me like a better thing in SOHO environments regarding
interoperability with other devices in that environment however as I
still need the NDP-Proxying fallback in case the upstream router (be it
a SOHO-router) doesn't support further distribution of the ISP-Prefix.
we do have an implementation on github that implements
http://datatracker.ietf.org/doc/draft-arkko-homenet-prefix-assignment/
that supports prefix assignment with an arbitrary topology in the network. why
not use that?
From a technical point of view I like your approach and using OSPF.
However the stuff is >1 MB in size including all of its dependencies and
includes some strange dependencies like libreadline?, some otherwise
unrelated Lua extensions and so on.
Sorry, that is not an option for the majority of OpenWrt users, just for
having a more versatile Prefix Delegation feature which will only be (?)
interoperable with a small amount of routers.
We could integrate it for more powerful routers though (and I wouldn't
object) but I don't see any hope to get it to mainstream before we can
get it down to a few 100 KB (including dependencies).
Also at least I don't have any time or resources to take care of either
of that in the near future.
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