[cisco-nas] common pool for many NAS

[Tassos Chatzithomaoglou]

What is the preffered way of using o common pool (/24) in many access routers?

Let me describe it a little better:

We have a lot of as5300 where we define locally 2 pools: 1 big (/24) and 1 small (/30), 
for 2 kinds of dialup customers. The 2 customer kinds have different profiles in our 
radius, which define different local pools names for each one.

We want to define all these small /30 networks as a /24 in a central router/server and 
those specific customers to get ips from this router/server.
The problem is that we want to use such a method through aaa/radius, so we won't need to 
create another group-async/dialer/vtemplate interface on the as5300.

Ofcourse, the central router/server should take care in order to not give the same ip 
concurrently on 2+ users (even on different as5300s), like in local pool ip addressing.

Could dhcp be the solution in our problem?
If yes, wouldn't there be problems with dhcp/bootp requests across our wan/lan inks? 
Helper-address seems to address this issue, but then why should all broadcasts be 
forwarded to the central router/server?

-- 
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    Chatzithomaoglou Anastasios
Network Design & Operations Center
           FORTHnet S.A.
       <achatz at forthnet.gr>
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