>Hi,
>
>Discussing one implementation, a possible source of ambiguity in RFC2461
>came up.
>
>RFC2461 discusses that next-hops must be on-link.
>
>However, section 8 on redirect basically requires:
> - routers know each others' link-local addresses (not an issue from
>hosts' perspective, just use routing protocols or other mechanisms)
> - hosts are able to verify that the redirect comes from the link-local
>address the host is currently using as its next-hop
>
>The latter is a bit problematic. How could the host know this in the case
>where the next-hop has been configured using e.g. a _global_ (but on-link)
>address?
to say it backwards, for the ICMPv6 redirect to work correctly, nexthop
address on the routing table MUST be link-local (even when manually
configured). i think adding this text clarifies the concern.
itojun
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