RADIUS, anycast, and high availability

[Miquel van Smoorenburg]

In article <xs4all.A06438D2-4935-406C-BC80-73C6DB2A3F48 at logn.net> you write:
>On Jun 26, 2014, at 8:53 AM, Phil Mayers <p.mayers at imperial.ac.uk> wrote:
>> A lot depends on how stable the routing is, and how many next-hops are
>present, as well as how your routers hash between multiple next-hops
>e.g. ip or ip + port.
>
>Yeah, I'm just starting to look into this.  We're on Juniper gear (sorry
>Arran!) and I think it tries to maintain a stable path for the same IPs.

If you're on Juniper, you might want to look into this:
http://www.slideshare.net/SkillFactory/02-34638420
page 27-30: L3-L4 load balancing with consistent hashing.

You do need to inject routes from your radius servers, so use
ExaBGP for that: https://github.com/Exa-Networks/exabgp

Mike.