Simplified Interinstance Route Sharing
When support for multiple virtual private network (VPN) routing and forwarding (VRF) instances became available in JUNOS software, an issue arose concerning the import and export of routes to other instances and routing protocols from individual instances. Interinstance route sharing required configuration of routing table groups (sometimes referred to as RIB groups) for every routing instance that exports routes to other tables.
Policy-based interinstance export in JUNOS 5.4 simplifies the configuration requirements for users, maintains existing functionality, and, when possible, eliminates the use of routing table groups. This guide explores in detail the streamlined configuration hierarchy that has been created for interinstance route sharing.