NSR for MPLS and VPN using chained composite next hops

In addition to the support of chained composite next hops, NSR switchover is supported for the following MPLS and VPN protocols and applications:

• Labeled BGP
• Layer 2 VPNs
• Layer 3 VPNs
• LDP

Nonstop active routing support for LDP includes:

• LDP unicast transit LSPs
• LDP egress LSPs for labeled internal BGP (IBGP) and external BGP (EBGP)
• LDP over RSVP transit LSPs
• LDP transit LSPs with indexed next hops
• LDP transit LSPs with unequal cost load balancing