As the title says, consider two datacenters. Call them US Central and Europe West, Each regional location has two routers. Actually PA firewalls, but for this purpose consider them routers. Need cross connectivity, and of course access to branches.
I am thinking each DC has an AS, and in each datacenter, both routers have iBGP with it's peer. Between the datacenters each core is full mesh with the other two via eBGP. route-map and prefix-list to control exchanges. The branches utilize communities to reach their respective regions. Is this still a sane way to accomplish this, is there something else I should be considering?
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