Configuring an IGP on the PE and P Routers on EX9200 Switches
For Layer 2 VPNs, Layer 3 VPNs, virtual-router routing instances, VPLS, EVPNs, and Layer 2 circuits to function properly, the service provider’s PE and P routers must be able to exchange routing information. For this to happen, you must configure either an IGP (such as OSPF or IS-IS) or static routes on these routers. You configure the IGP on the master instance of the routing protocol process at the [edit protocols] hierarchy level, not within the routing instance used for the VPN—that is, not at the [edit routing-instances] hierarchy level.
When you configure the PE router, do not configure any summarization of the PE router’s loopback addresses at the area boundary. Each PE router’s loopback address should appear as a separate route.