How many Radius Servers do I need in my environment for 802.x?

[william.hostetler]

I am seeting up Radius for all my controllers which is 5 because I have 5 buildings. 2 of these buildings have 100 MB connectiosn the other 3 have a 10 MB connection. Is it ncessary to put a Radius server in each building? I have about 1000 or more clients between all the buildings.

[jerryard1]

It's not necessary to put a RADIUS server in each building. Usually having two located at the head end (Data Center or primary building works best) for redundancy. But if you're looking for survivability in case of an inter-building outage, then having one at each site will work fine.

As to the number of clients, it depends on the type of RADIUS server. Are you using Microsoft's IAS/NPS or Cisco's ACS?

[william.hostetler]

I am using Microsoft's IAS solution. Don't I have to use the same certificate for both Radius servers etc.?

[Stephen Rodriguez]

You would want to request a cert for each one from your CA.  So long as the client trusts your Root, it will be able to use the server to authenticate against.

Cheers,

Steve

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