[90220] in North American Network Operators' Group
Re: Anycast applicable to Radius Server Farm - further questions?
daemon@ATHENA.MIT.EDU (Joe Shen)
Mon May 8 11:49:32 2006
Date: Mon, 8 May 2006 23:47:01 +0800 (CST)
From: Joe Shen <joe_hznm@yahoo.com.sg>
To: "Edward B. DREGER" <eddy+public+spam@noc.everquick.net>,
NANOG <nanog@merit.edu>
In-Reply-To: <Pine.LNX.4.62.0605080450220.2191@pop.ict1.everquick.net>
Errors-To: owner-nanog@merit.edu
>
>
> JS> Could it be any problem with AAA procedure?
>
> UDP is anycast-friendly. Your biggest problems are
> likely to be
> authentication database replication/synchronization
> and merging
> accounting records... i.e., nothing really different
> from standard
> RADIUS deployments.
What I met problem to understand is,
1) Is that required to route traffic from a specific
BRAS to exact one server if DB behind radius server is
syncronized periodically
2) There is two Farm, each has several servers. As
number of paths supported by cisco/Juniper router is
limited ( <= 8 or 16), we could not mix those server
into one farm. is there any way to balance load
between two or more farms automatically?
>
> Load balancing is trickier when RADIUS servers and
> NASes live on the
> same network segment. You'll need something a la
> Windows Advanced
> Server or distributed 802.3ad. I know of no
> turn-key implementation of
> the latter;
Do you mean aggregate interfaces of several servers
into one 802.3ad trunk? I think even NASes and radius
live on the same ethernet, OSPF/IS-IS could establish
equal cost paths.
thanks
Joe
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