AAA authentication- how to select aaa-server??

[rehanshaikh]

Hi,

I was wondering if someone can advise me if it is possible to select what aaa-server the client connects too.

i.e.
I wish too have two aaa-servers,

aaa-server Auth (vlan22) host 10.2.2.70 secretkey timeout 10
aaa-server Auth (vlan22) host 10.2.2.72 secretkey timeout 10

How would I select client 10.80.235.42 (or particular IP ranges) to select aaa-server 10.2.2.72

Currently all clients look at aaa-server 10.2.2.70

aaa-server TACACS+ protocol tacacs+
aaa-server RADIUS protocol radius
aaa-server LOCAL protocol local
aaa-server Auth protocol tacacs+
aaa-server Auth (vlan22) host 10.2.2.70 secretkey timeout 10