RPD route resolution module

Route resolution is how protocols learn which nearby router to use to reach a neighbor that is several hops away. The resolver module of the routing protocol process (rpd) is designed to handle incoming routing information more quickly. This helps the system update the routing table (RIB) and the forwarding table (FIB) faster. As a result, rpd uses less CPU and works better in large networks, especially those with:

• High scale internal BGP (IBGP) routes in the inet.0 and inet6.0 routing tables
• Internal BGP multipath routes
• High RSVP equal-cost multipath routes
• Virtual route reflector deployments where a forwarding state is not built

In Junos OS 26.2, we added optimized route re-resolution in the resolver module to reduce CPU utilization during route churn. This optimization extends re-resolution beyond inet.0 and inet6.0 to .inet.0, .inet6.0, and L3VPN tables (bgp.l3vpn.0, bgp.l3vpn-inet6.0). The resolver also supports optimized re-resolution for recursive resolution cases and for resolution over multipath prefixes.