Re: 6to4 relays [Re: WG Review: IPv6 Operations (v6ops)]

[Brian E Carpenter <brian@hursley.ibm.com>]

Jun-ichiro itojun Hagino wrote:
> 
> >The specification that the IETF actually approved was for router-based
> >6to4, not host-based, and it was assumed that router operators would
> >club together to configure and share relays. Clearly, a client-host
> 
>         WinXP node can become a router, so there's nothing prohibiting WinXP
>         from running 6to4.  in fact, i don't see any distinction between
>         "router-based 6to4" and "host-based 6to4" in the RFC.  am i mistaken?

>From the Introduction to RFC 3056:

>    The basic mechanism described in the present document, which applies
>    to sites rather than individual hosts, will scale indefinitely by
>    limiting the number of sites served by a given relay router (see
>    Section 5.2).  It will introduce no new entries in the IPv4 routing
>    table, and exactly one new entry in the native IPv6 routing table
>    (see Section 5.10).
> 
>    Although the mechanism is specified for an IPv6 site, it can equally
>    be applied to an individual IPv6 host or very small site, as long as
>    it has at least one globally unique IPv4 address.  However, the
>    latter case raises serious scaling issues which are the subject of
>    further study [SCALE].

    Brian