DHCP6 default router

[Sander Steffann]

Hi Max,

> Yes, all this is for routers, to let customers behind them to have IPv6
> connectivity. For that, we have to provide a prefix behind the router
> via PD.
> 
> As I said, the routers are very different. Customers buy what they want.
> There are D-Link, TP-Link, Asus and Planet mostly, very different versions.
> 
> Or may be ~0,1% of success with DHCP PD is just a good rate, and I do
> not need to investigate it?

If you just take a random CPE router chances are that:
- It doesn't support IPv6 at all
- It can support IPv6 but needs a firmware update
- It does support IPv6 but has it disabled by default
- It does support IPv6 but has the wrong default settings (only looking for 6rd for example)

If you don't control the routers then you can only offer the possibility of doing IPv6 to the customers. Whether the customer actually uses it is then up to them. But unless you have lots of users who paid attention to IPv6 support when buying the router your experiences up to now aren't that strange...

So: send RA's for the default route and SLAAC/DHCPv6 settings. If you support clients connecting to your network without a router then you'll also want to offer them a way to get IPv6 (Prefix on the link + SLAAC or DHCPv6 IA-NA). If you only support customers connecting routers then you can do either numbered or unnumbered links to them + DHCPv6-PD.

Then connect a few routers that you *know* support IPv6 correctly to test it, and probably document it on your website to advise customers when buying new routers :-)

- Sander