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MPLS Support

The Juniper Cloud-Native Router contains support for MPLS routing protocols. You use the JCNR-controller, or cRPD, to configure MPLS using the node annotations at the time of deployment or via the cRPD CLI.

The cRPD then sends the configuration to the vRouter-agent, using gRPC. The vRouter-agent then converts the configuration to network policies that it imlements in the vRouter. The cloud-native router supports the following MPLS-based routing protocols:

MPLS Support

  • L3 MPLS VPN (MPLS)—L3 MPLS VPNs are also known as BGP/MPLS VPNs because BGP is used to distribute VPN routing information across the provider’s backbone, and MPLS is used to forward VPN traffic across the backbone to remote VPN sites. The cloud-native router can particpate as a sending, receiving or transit router using the MPLS protocol. Review the L3 VPN User Guide for more information.

  • Segment Routing-MPLS (SR-MPLS)—Segment routing is a control-plane architecture that enables an ingress router to steer a packet through a specific set of nodes and links in the network without relying on the intermediate nodes in the network to determine the actual path it should take. SR-MPLS employs segment routing in MPLS. The cloud-native router can participate as a sending or receiving router in SR-MPLS networks. Review the Junos source packet routing topic for a configuration example.

  • MPLS over UDP (MPLSoUDP)—MPLSoUDP is an overlay technology that encapsulates MPLS packets within UDP packets to traverse through some networks that do not support native MPLS or SR-MPLS. The cloud-native router can participate as a sending, receiving or transit router using MPLSoUDP. Review the Configuring Next-Hop-Based MPLSoUDP Tunnels topic for a configuration example.

  • Label Distribution Protocol (LDP)—The Label Distribution Protocol (LDP) is a protocol for distributing labels in non-traffic-engineered applications. LDP allows routers to establish label-switched paths (LSPs) through a network by mapping network-layer routing information directly to data link layer-switched paths. The cloud-native router can participate as a sending, receiving or transit router using LDP. Review the LDP Overview topic for more information.