ULAs [Re: draft-ietf-v6ops-ipv6-cpe-router-03.txt WGLC]

[Brian E Carpenter <brian.e.carpenter@gmail.com>]

On 2010-01-06 08:00, Dan Wing wrote:
...
> Section 3.1 should additionally mention that an end-network
> IPv4 CPE that incorporates a NAT also incorporates a DHCPv4 
> server.  The inclusion of a DHCP server in the CPE is implied, 
> but should be explicitly stated.  The DHCP server in the CPE 
> allows the in-home network to be self-sufficient (for IP 
> addressing, if not naming).

Sure, for IPv4, you need DHCP, but...

> 
> This is relevant to IPv6 because, I have been told, ULAs
> provide a similar "LAN only" address.  This should be
> mentioned or a pointer to how hosts inside the home should
> use ULAs mentioned.  We do not want streaming between an
> in-home NAS and an in-home television to rely on the
> WAN link's availability.  This is mentioned (insufficiently)
> in Section 4.2 and some of the L-* requirements.

I don't understand what you're getting at here. Whether the
LAN uses a ULA prefix is orthogonal to whether it uses
DHCPv6. It can be set up by RAs and SLAAC (or even manually,
but that's unlikely).

I think the L-* requirements for ULAs are necessary and sufficient.
Despite the problems with RFC3484, I think the provision of a ULA
prefix by the CPE will bring about local streaming automatically.
That was certainly the intention behind ULAs.

     Brian