INE Vol 1 - Lab 12 - finished - OSPF Domain-ID.

In this lab we were asked to peer with the PE routers from 4 remote CE sites using different OSPF AS numbers. The 4 routers were put into 2 VPNs (as most of these labs require). Using different RDs and importing and exporting different RTs, only the members of a vpn were able to talk to each other.

The part that this lab tests you on is OSPF Domain-ID. Using the same domain-id for OSPF on the PEs for the CE members in the same VPN allows the OSPF routes on the CEs to look like inter-area (ia) routes instead of external (e2) routes. This means that over mpls cloud, the 2 sites are looking like they're separated by an area-boarder router when in actuality they're still mutually redistributed into BGP.

On to the next lab.