Ole Troan <[email protected]> wrote:
> > I was planning on using ISC DHCP 4.3.1 together with an external script
> > as described in https://github.com/mpalmer/isc-dhcp contrib, to detect the
> > next hop address of my homenet router and install the relevant route for
> > the delegated prefix on the last-hop ISP router (a Linux box). 

> typically the ISP router snoops DHCPv6 messages and does route injection
> based on that, or the DHCPv6 server runs on the ISP router and does route
> injection based on binding state. 

The IPv6 support in ServPOET's PPPoE BMS (which I wrote last year) runs a
DHCPv6 daemon on the router itself, and simply adds a route via the PPP link
when the DHCPv6-PD occurs.

The selection of prefix comes from radius during the PPP
negotiation/authentication, and is passed "laterally" from the PPP process to
the DHCPv6 process (which is called rfc6204d, because 7208 wasn't quite out
at the time).

The amount of DHCPv6 processing required for a PPP link is remarkably small,
and I worry that I may have done too little.  Of the three CPEs that I've
tested with, one is OpenWRT BB (thanks to Stephen and Markus and the rest of
the crew) and worked great, a second locked up tight when given an IPv6 PD,
a third proclaimed "IPv6 suport" on the box, but had nothing inside.  I have
two more devices to test with: one of which requires translation from
chinese, and the fifth I got last week, and I haven't powered on yet. (Thanks 
Hui!)

I've been talking on and off with Tim Winters of the UNH interop lab, and at
this point it seems that they just aren't equipped with IPv6 capable CPEs
that do PPP such that visiting there makes sense.  There are some there that
do cable/ethernet-WAN, but not PPPoE WAN.

(also [email protected] two days/week)
-- 
Michael Richardson <[email protected]>, Sandelman Software Works
 -= IPv6 IoT consulting =-



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