I need some help in deciding on a best practice design for building WAN and Service redundancy/ high availability into our Mulit-Metro Ethernet circuit Topology. I have read about various technologies such as MST, Bridging, Sharing one VTP/VLAN domain between location edge and core devices, MPLS. Just not sure which if any are suitable for our current and growing infrastructure. I am thinking one or possibly two of the above technologies along with EIGRP will work in the below environment?
The Circuit Vendor Topology: Full mesh cloud over one VLAN
Our Topology: Hub/Spoke using EIGRP, trunking on circuit facing interfaces, site specific vlans/vtp domains on edge devices - which makes redundancy / best path impossible as traffic is only allowed to pass from point A to B or A to C, but not from B to C unless traversing A.
1 - Hub - Core Site = Cisco 6509 (600mg ethernet circuit)
1 - Diaster Recovery Site = Cisco 3750 (100mg ethernet circuit) (in process of bringing up)
12 - Branch Sites = Cisco 3750 - 3560 (30-70mg ethernet circuit)
I really need to get this implemented before the next big project - Multihoming ISP's using ASA5520's
Hopefully this is not a redundant question in the community, but any expertise is greatly apprciated!