TE Options : bgp-igp

When you configure an LSP, a host route (a 32-bit mask) is installed in the ingress router toward the egress router; the address of the host route is the destination address of the LSP. The bgp option for the traffic-engineering statement at the [edit protocols mpls] hierarchy level is enabled by default (you can also explicitly configure the bgp option), allowing only BGP to use LSPs in its route calculations. The other traffic-engineering statement options allow you to alter this behavior in the primary routing instance. This functionality is not available for specific routing instances. Also, you can enable only one of the traffic-engineering statement options (bgp, bgp-igp, bgp-igp-both-ribs, or mpls-forwarding) at a time. You can configure BGP and the IGPs to use LSPs for forwarding traffic destined for egress routers by including the bgp-igp option for the traffic-engineering statement. The bgp-igp option causes all inet.3 routes to be moved to the inet.0 routing table.