[j-nsp] Anybody have an SRX working with Comcast DHCP v4 and v6?

[Chris Adams]

Once upon a time, Aaron Dewell <aaron.dewell at gmail.com> said:
> I attempted to make this work on an SRX210 running 12.1X46-D30 with TWC.  The inherent issue was that Junos will only accept multiples of 16 bit-boundaries as a dhcpv6 client, and /56 (as TWC assigns) is not accepted.
> 
> So it’s less about your settings and more about the known PR, assuming that Comcast is delegating a /56 as TWC does.

For residential, I think the largest Comcast assigns by PD is /60.
However, it is up to you to set the request size; DHCPv6 has a field for
that (IIRC by default you only get a /64 from Comcast).

I see (on OpenWRT, not JUNOS) a /128 assigned to the WAN interface and a
DHCPv6 PD /60, which OpenWRT then carves up for the local networks.

-- 
Chris Adams <cma at cmadams.net>