[cisco-nas] common pool for many NAS

[Aaron Leonard]

> >>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.
> >
> >
> > Sounds to me like one good answer is to have RADIUS assign
> > the IP addresses.
> >
> But how can i have radius assign different ip address per user? How will radius know which
> ip address is being used?

Many RADIUS servers have the capability of maintining their own
(internal) address pool - so they take on the job of allocating
addresses to the clients.  You do have an issue when you have 
multiple RADIUS servers, making sure that they coordinate their
address assignments.

> >>Could dhcp be the solution in our problem?
> >
> >
> > Yes, you could use DHCP for this too.  That is,
> > DHCP from the DHCP server to the 5300; the 5300
> > would proxy the info from DHCP to IPCP for the
> > clients.

> So i just have to configure a dhcp server entry on each of the AS5300s and then configure
> the dhcp pools on the dhcp server?

Also use "peer default ip address dhcp" on the interfaces.

> Do the dhcp pools and the dhcp server have to be in the same ip range?

No.

Aaron