Could you please clarify the following question for me?
When Edge Clusters are created in VCF, a minimum of two 2 edges must be added but it is not clear to me if one Edge should go with the BGP values of DC1 and the second Edge with the BGP values of DC2. The above is correct, now I can create 4 Edges (2 for each Datacenter)
I assume you either have a stretched cluster or two site local clusters in VCF but in both cases your intention is to span a Tier-0 GW across the two sites.
For redundancy and performance reasons I would create an Edge cluster with 4 Edge nodes total, two per site. Depending if your uplink VLANs are stretched across both sites or if they are only available within each site:
- All Edges in AZ1 and AZ2, in essence the Tier-0 GW, have their uplink interfaces in the two stretched uplink VLANs. All Edge nodes peer with a router in AZ1 and AZ2 through both uplink VLANs, 4 peers in total.
- Each pair of Edge nodes, in essence the Tier-0 GW, have their uplink interfaces in the two site local uplink VLANs in AZ1 and AZ2 respectively. Edge nodes in AZ1 peer with a router in AZ1 and Edge nodes in AZ2 respectively, 4 peers in total.
For both cases: Depending on how you wan't your traffic carried to your physical network, you might use traffic steering options in BGP like local preferences and AS path prepending to have e- and ingress traffic though AZ1 primarily. Or you don't steer your traffic but you'll have asymmetric routing (which doesn't need to be negative).