I changed a bit my design because of two things.
1. RTT between the Data Center is about 80ms
2. We server apps to the Internet and they are very sensitive.
Please see attached file.
My dilemma now is should I split A1 and make DC1 with A0 and DC2 with A1 ??
I want to have A1 across the DCs for OSPF/BGP failover funcionality.
HQ would be configure as Stub Area.
We can not afford any IGP convergence impacting from DC1 to DC2 or vice-versa.
What if I lose the connections between DCs? What would happen to A1 ?
Suggestions/Comments and Critics...please.
ps. DMZ the are about 8 public subnets