Re: draft-wbeebee-ipv6-cpe-router-04 comments

[Ole Troan <otroan@employees.org>]

On Mon, Mar 23, 2009 at 4:02 PM, james woodyatt <jhw@apple.com> wrote:
> On Mar 23, 2009, at 15:57, Ole Troan wrote:
>>
>> ...and turning ND into a routing protocol?
>
>
> From Section 1 of RFC 4191:
>>>
>>> We use Router Advertisement messages, instead of some other protocol like
>>> RIP [RFC2080], because Router Advertisements are an existing standard,
>>> stable protocol for router-to-host communication. Piggybacking this
>>> information on existing message traffic from routers to hosts reduces
>>> network overhead. Neighbor Discovery shares with Multicast Listener
>>> Discovery the property that they both define host-to-router interactions,
>>> while shielding the host from having to participate in more general
>>> router-to-router interactions. In addition, RIP is unsuitable because it
>>> does not carry route lifetimes so it requires frequent message traffic with
>>> greater processing overheads.

indeed. MSR is a router-to-host mechanism. the CPE acts for some
purposes as a host on the upstream interface. do you expect the MSR
routes to be limited to be used only for the host part of the CPE (i.e
communication originating from the CPE) or to make it into the CPE's
forwarding table?

Ole