Anycast and prefix segments in SPRING for OSPF protocols

Anycast and prefix segments are supported in SPRING. An anycast segment enforces forwarding based on the equal-cost multipath-aware shortest-path toward the closest node of the anycast set. Within an anycast group, all the routers advertise the same prefix with the same SID value, which facilitates load balancing. You can designate prefix segment indexes to prefix SIDs, both anycast and node SIDs, that are advertised in OSPF through policy configuration. Remote routers use this index to consolidate prefixes into respective SRGBs and to derive the segment identifier and forward the traffic destined for a specific prefix. You can also configure explicit-NULL flag on all prefix SID advertisements and configure shortcut statement for SPRING routes using family inet (for IPv4 OSPF routes) or family inet-mpls (for IPv4 L-OSPF routes).