Entropy label support for BGP Labeled Unicast (BGP-LU)

Entropy labels for BGP labeled unicast LSPs are supported. You can configure entropy labels for BGP labeled unicasts to achieve end-to-end load balancing. BGP labeled unicasts generally concatenate RSVP or LDP LSPs across multiple IGP areas or multiple autonomous systems. RSVP or LDP entropy labels are popped at the penultimate hop node, together with the RSVP or LDP label. However, there are no entropy labels at the stitching points. Therefore, in the absence of entropy labels, the load-balancing decision at the stitching points was based on deep packet inspection. Junos OS now allows the insertion of entropy labels at the BGP labeled unicast LSP ingress.