On Tue, 5 May 2009, Jack Bates wrote:
DHCPv6-PD requires manual configuration.
Are you sure? Isn't it just that the current implementations do?
Sure, but how does the router know it needs to hand out a /62? Then what about the router after that? Does it hand out a /61? then the router behind that?
What if the ISP only gave a /60?
Guess someone needs to write a draft with BCP regarding this, or perhaps extend the protocol to include that the requestor can ask for a preferred size (or do multiple /64 PDs).
PD is not designed for multiple stage delegations without manual configuration for each stage.
I see no problem with sane defaults solving that problem. Now, if every ISP now adhered to handing out at least a /56 to each home, sane defaults could be created. If each ISP does it its own way, sane defaults won't work. So just hand out a /56 or /48 and be done with it. Your idea of chained /64 doesn't really solve anything that couldn't be solved with a /64 default PD handout in the home gateway as far as I can see it? -- Mikael Abrahamsson email: swmike@swm.pp.se