Cisco CRS Configuration Manual page 212

Point-to-Multipoint Traffic-Engineering
Mid-point
Specifies the transit node in which LSP signaling is processed (for example, not a source or receiver).
Receiver, Leaf, and Destination
Specifies the node in which LSP signaling ends.
Branch Point
Specifies the node in which packet replication is performed.
Source-to-Leaf (S2L) SubLSP
Specifies the P2MP-TE LSP segment that runs from the source to one leaf.
Point-to-Multipoint Traffic-Engineering Features
• P2MP RSVP-TE (RFC 4875) is supported. RFC 4875 is based on nonaggregate signaling; for example,
per S2L signaling. Only P2MP LSP is supported.
• interface tunnel-mte command identifies the P2MP interface type .
• P2MP tunnel setup is supported with label replication.
• Fast-Reroute (FRR) protection is supported with sub-50 msec for traffic loss.
• Explicit routing is supported by using under utilized links.
• Reoptimization is supported by calculating a better set of paths to the destination with no traffic loss.
Note
• IPv4 and IPv6 payloads are supported.
• IPv4 and IPv6 multicast forwarding are supported on a P2MP tunnel interface through a static IGMP
and MLD group configuration .
• Both IP multicast and P2MP Label Switch Multicast (LSM) coexist in the same network; therefore, both
use the same forwarding plane (LFIB or MPLS Forwarding Infrastructure [MFI]).
• P2MP label replication supports only Source-Specific Multicast (SSM) traffic. SSM configuration
supports the default value, none.
• Static mapping for multicast groups to the P2MP-TE tunnel is required .
Point-to-Multipoint Traffic-Engineering Benefits
• Single point of traffic control ensures that signaling and path engineering parameters (for example,
protection and diversity) are configured only at the TE source node.
• Ability to configure explicit paths to enable optimized traffic distribution and prevention of single point
of failures in the network.
• Link protection of MPLS-labeled traffic traversing branch paths of the P2MP-TE tree.
Cisco IOS XR MPLS Configuration Guide for the Cisco CRS Router, Release 5.1.x
194
Per-S2L reoptimization is not supported.
Implementing MPLS Traffic Engineering