[colug-432] CMH TW providing residential ipv6

[R P Herrold]

> On Jun 23, 2014, at 14:58, R P Herrold <herrold at owlriver.com> wrote:
> 
> when one switches to a third party (Motorola 6121) cable modem 
> [1].  I bought mine through NewEgg, moved the coax cable to 
> the new unit, called TW TS and gave them the new MAC address, 
> rebooted, and that's about it
> 
> in this block: 
>    2605:a000:110f:807e:xxxx:xxx:xxxx:xxxx
> 
> I will be experimenting, but it appears that my Apple Airport 
> Extreme also knows how to act as an IPv6 router for the 
> upstream, and to hand out assignments in the correct ipv6 
> delegated fashion, as well as the regular ipv4 DHCP
> 
> I failed to note the netblock delegation size, and will be 

It SEEMS to be a /64 block they are handing out -- at an end 
Windows 7 box:

IPv6 Address:            2605:a000:110f:807e:xxxx:xxxx:xxxx:xxxx
Temporary IPv6 Address:  2605:a000:110f:807e:yyyy:yyyy:yyyy:yyyy
Link-local IPv6 Address: fe80::45d0:89bd:e5d1:5eaa%10
IPv6 Default Gateway:    fe80::daa2:5eff:fe7a:47a6%10
IPv6 DNS Server:         2605:a000:110f:807e:daa2:5eff:fe7a:47a6

That Gateway is the 'next hop' Apple device, with the content 
transiting on the link-local address, even though I have it 
acting as a router. It is 'one way' "firewalled" until one 
opens forwarding 'pinholes (that: fe80:: series), or connects 
over IP/SEC (the preferred ipv6 method)

Reboot address assignment 'durability' remains to be tested. 
My side is protected by a UPS, and one assumes TW does the 
same, although of course one cannot be sure absent an 'acid 
test' -- As they are provisioning VOIP and are assumedly not 
willing to suffer bad PR, it allows one to HOPE that they also 
have such

-- Russ herrold