Hi,
On 18/08/2018, at 10:44 PM, Alan Buxey <alan.buxey@gmail.com> wrote:
how does this all work in practice where the clien thas multiple concurrent IPv6 addresses on the NAS? does the NAS send multiple records (one for each address), send multiple IPv6 addresses in a single update RADIUS datagram ?
IPv4+IPv6 varies between NAS models and configurations: Sometimes you get IPv6-only “sessions” (i.e. maybe auth, and accounting). Sometimes you get combined IPv4 and IPv6 sessions. Sometimes you get a session for PPP and IPv4, and another for IPv6. Within that, IPv6 with multiple addresses/prefixes generally results in a single session. Is is very common (the norm) to have multiple addresses - i.e. a subscriber will get a /128 for their “WAN” address, and a /56 or similar for things behind their CPE. These are represented as Framed-IPv6-Prefix and Delegated-IPv6-Prefix respectively, though Cisco (on ASR9k at least) don’t send Framed-IPv6-Prefix and instead send it as Cisco-AVPair = “addrv6=blah”. The usual nonsense, as you can imagine :-) Check out 3.6 of RFC6911. -- Nathan Ward