Re: CPE router acting as host on its WAN interface (RE: draft-ietf-v6ops-ipv6-cpe-router-03.txt WGLC)

[james woodyatt <jhw@apple.com>]

On Jan 5, 2010, at 08:59, Templin, Fred L wrote:
> 
> The final sentence of Appendix D also says:
> 
>  "In these cases, a subsequent Neighbor
>   Advertisement or Router Advertisement message will set
>   the correct IsRouter value."
> 
> but if the CPE will not send any RA messages over its
> WAN interface then the NA is the only other option for
> setting the correct IsRouter value.

Perhaps, now would be a good time for me to reiterate my complaint that we don't have a good zero-configuration, stateless routing protocol built into ICMP6.  RA and RS are conceptually tied to the roles of default router and host, specifically, and they quite unsuitable for use in a model where a host on one prefix is also a router for another, delegated, prefix.

I'm inclined to think we should take the Route Information Option from RFC 4191 and define a way to add it to the Neighbor Advertisement message.


--
james woodyatt <jhw@apple.com>
member of technical staff, communications engineering