Where to buy Internet IP addresses

Mikael Abrahamsson swmike at swm.pp.se
Tue May 5 15:11:54 CDT 2009

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 at swm.pp.se

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