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MPLS

  • Enhancements to BFD-triggered fast reroute for unicast next hops (ACX7024, ACX7100-32C, ACX7100-48L, and ACX7509 Routers)—Starting in Junos OS Evolved Release 23.2R1, we've enhanced the Bidirectional Forwarding Detection (BFD)-triggered fast reroute (FRR) for unicast next hops. The BFD triggered local repair option is enabled by default.

    When a BFD link goes down at a remote link, BFD triggered repair is enabled on the local device. The BFD session is brought down on the local device PFE, and the routing protocol recalculates a new route. Use the session-id-change-limiter-indirect configuration under the [edit routing] hierarchy to limit the recalculation of parent nodes for the indirect next hop. The convergence is faster resulting in lesser traffic downtime.

    To disable this option, use the command set routing-options no-bfd-triggered-local-repair and restart routing configuration.

    [See Bidirectional Forwarding Detection (BFD) for MPLS, session-id-change-limiter-indirect, and no-bfd-triggered-local-repair.]

  • Support for IPv6 L3VPN over IPv6 SR-TE and IPv6 underlay (ACX7024, ACX7100-32C, ACX7100-48L, and ACX7509)—Starting in Junos OS Evolved Release 23.2R1, you can configure an IPv6 Layer 3 VPN (L3VPN) connection with an IPv6 local address and an IPv6 neighbor address. You can connect an IPv6 provider edge (PE) device with a colored or non-colored IPv6 penultimate next-hop (PNH) address mapped to IPv6 segment routing–traffic engineering (SR-TE) tunnels.

    [See Understanding Static Segment Routing LSP in MPLS Networks and Link-State Distribution Using BGP Overview.]