[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

Re:

On Tue, 08 Jul 2008 11:16:36 +1200,  wrote:

> I suggest that if address acquistion by DHCPv6 fails, there

> should be a (configurable) option to discover a 6to4

> relay. CPE routers were in fact a target when 6to4 was designed.

> It only needs a few lines and a reference to RFC 3056 and 3068.



While I don't necessarily disagree with the high-level idea, I am not a big

fan of automatically configuring 6to4 gatewaying on the sole basis of

having an IPv4 address.



I have had multiple cases of public IPv4 addresses with non working 6to4

relay:

- no anycast 6to4 routing,

- anycast 6to4 relay temporarily broken,

- public IPv4 address space behind a NAT (!),

- stateless firewall that drops proto-41,

- statefull firewall that tracks proto-41 "bindings"...



I wish private IPv4 addresses had the same scope as public IPv4 addresses

within RFC3484 - then broken 6to4 would not be so much of a problem

anymore.



> Also I suggest that there should be a configurable option

> to generate and support a ULA prefix. Again, a few lines

> and a reference to RFC 4193.



Yes.



-- 

Rémi Denis-Courmont