MPLS Applications
In the Junos OS implementation of MPLS, establishing an LSP installs on the ingress router a host route (a 32-bit mask) toward the egress router. The address of the host route is the destination address of the LSP. By default, the route has a preference value of 7, a value that is higher than all routes except direct interface and static routes. The 32-bit mask ensures that the route is more specific (that is, a longer match) than all other subnet routes. The host routes can be used to traffic-engineer BGP destinations only, or both IGP and BGP destinations.
This section discusses the following topics:
