BGP classful transport (CT) - IPv4 protocol next-hop

This feature introduces BGP classful transport planes for services resolved over IPv4 protocol next hops. Use this feature to configure transport classes for classifying a set of transport tunnels in an intra-AS network based on the traffic engineering characteristics. The transport classes put the set of transport tunnels in separate transport routing information bases (RIBs) and use these transport RIBs to resolve Layer 3 VPN service routes with the desired SLA and intended fallback. BGP classful transport planes can extend these tunnels to inter-domain networks that span multiple domains (autonomous systems or IGP areas) while preserving the transport class. To do this, you must configure the BGP classful transport layer BGP family between the border and service nodes.