[cisco-bba] l2tp failover and loadbalancing

[Oliver Boehmer (oboehmer)]

Raj Panchal <> wrote on Friday, January 27, 2006 6:17 AM:


> Hello,
> Has any one tried failover and loadbalancing between 3com hiper LAC
> and Cisco LNS using Merit Radius.
> If yes then can you help me with radius config for the same ?

The Cisco LNS just accepts the sessions thrown at it, so no config
there, the load-balancing obviously happens at the LAC:
If 3com implemented RFC2868, just send multiple tunnel endpoints with
the same preference, i.e.

domain.com Password="....", Service-Type=Outbound-User
       Service-Type = Outbound-User,
       Tunnel-Type = :1:L2TP,
       Tunnel-Medium-Type = :1:IP,
       Tunnel-Server-Endpoint = :1:"10.1.1.1",
       Tunnel-Preference = :1:"10",
       Tunnel-Type = :2:L2TP,
       Tunnel-Medium-Type = :2:IP,
       Tunnel-Server-Endpoint = :2:"10.1.1.2",
       Tunnel-Preference = :2:"10",
       Tunnel-Type = :3:L2TP,
       Tunnel-Medium-Type = :3:IP,
       Tunnel-Server-Endpoint = :3:"10.1.1.3",
       Tunnel-Preference = :3:"10"

I think sending several endpoints with the same tag works as well, i.e.

       Tunnel-Type = :1:L2TP,
       Tunnel-Medium-Type = :1:IP,
       Tunnel-Preference = :1:"10",
       Tunnel-Server-Endpoint = :1:"10.1.1.1",
       Tunnel-Server-Endpoint = :1:"10.1.1.2",
       Tunnel-Server-Endpoint = :1:"10.1.1.3"

Hope it helps,

	oli

cc'ing c-nsp as you sent the Q to both aliases..