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Routing Protocols

  • Support for DDoS IS-IS classification (MX Series with MPCs MPC1 through MPC9, PTX1000, PTX5000, PTX10002, PTX10008, QFX10002, QFX10002-60C, QFX10008, and QFX10016)—Starting in Junos OS Release 22.1R1, Junos OS classifies IS-IS hello packets and IS-IS data packets separately. You can apply different policers to different types of IS-IS packets to improve the performance of IS-IS during congestion so that IS-IS doesn’t go down when a large number of packets are entering the device.

    Configure DDoS protection settings for IS-IS hello packets and IS-IS data packets separately using the isis-hello or isis-data statement at the [edit system ddos-protection protocols isis] hierarchy level. Use the show ddos-protection protocols isis parameters brief command to view the aggregate number of IS-IS packets as well as the number of IS-IS hello packets and IS-IS data packets.

    [See protocols (DDoS) (ACX Series, PTX Series, and QFX Series) and show ddos-protection protocols isis.]

  • Support for adaptive RSVP update threshold (cRPD, MX240, MX480, MX960, PTX1000, PTX10008, QFX10002-60C, and QFX10008)—Starting in Junos OS Release 22.1R1, you can configure the RSVP update threshold percentage and threshold value to adaptively pace IGP updates. You can configure a lower frequency when the adaptive bandwidth is higher and configure a higher frequency when the bandwidth is lower.

    You can enable the threshold percentage by using the update-threshold adaptive limit limit threshold-percent percentage configuration, and threshold value by using the update-threshold adaptive limit limit threshold-value value configuration at the edit protocols rsvp interface hierarchy level.


    You cannot configure both threshold-percent and threshold-value simultaneously on the same interface.

    [See update-threshold.]

  • Support for CBF fallback inside service group (MX10008)—Starting in Junos OS Release 22.1R1, you can create a te-group-id id group for uncolored tunnels. This helps to enable class-based forwarding (CBF) and fallback inside a service group at the same time for uncolored static segment routing–traffic engineering (SR-TE) label-switched paths (LSPs) with the first hop as a label or as an IP address.


    Colored SR-TE LSPs do not support this feature.

    [See source-routing-path.]