We have three sites joined by T1s. We are migrating to an MPLS cloud. We currently run OSPF with multiple areas, and our MPLS provider asked us to simplify our OSFP configuration by using a single zone across all sites. From a network perspective, every site will be the same. Starting at the internet and working in, each site will look like this:
Internet --> Internet Provider Router --> Firewall --> LAN Router --> MPLS Provider Router --> MPLS Cloud
We aren't very familiar with OSPF, and we'd like to verify that it's possible to have a single OSFP area (Area 0) across all three sites. The devices participating in this would be:
- Firewall (inside interface)
- LAN Router (all interfaces)
- MPLS ROuter (Lan-side interface)
Note: We plan to inject OSPF into BGP for routing in the MPLS cloud.