Hello, I'm looking for suggestions on how best to implement dynamic routing (ospf) in the following scenario:
1. Two 'hub' sites (I'll call them A & B)
2. Site A has an ASA 5520, B has a PIX515
3. Approx 60 spoke sites mainly using 857s with IPSec back to the ASA.
4. The two hub sites are connected via fibre (3560 switches). Each site is in a different subnet.
One requirement is to have the spoke sites fail-over to the PIX at site B if they cannot reach the ASA.
The other requirement is to run OSPF to achieve any-any comms between all sites.
The ASA/PIX don't support GRE termination or DMVPN so those two are out?
RRI might work and then define static ospf neighbours between the ASA and PIX or use multicast routing?
Or should we ditch the lot and go for MPLS throughout?
Any suggestions welcome, I hope this is enough info to understand, if not please let me know and I'll post more.