We use a central Radius configuration whereby dynamic PPPoE IPs are assigned to each client at the high site.

We are moving to an OSPF configuration, and notice that all the PPPoE IPs are replicated to all sites creating huge overhead and huge routing tables.

What would be more ideal is if just the block gets replicated, e.g. 172.16.202.0/24 instead of all the actual clients IPs, e.g. 172.16.202.10/32, 172.16.202.11/32, etc.

How do you achieve that with OSPF, i.e. replicate the block but not the individual IPs?

Yes that's right it creates lot of overhead, what you can do is that do not advertise connected networks, instead add a static route where you sumarize pppoe clients and then you can advertise that static route.

Regards.

Faton