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Routing Options

  • Enhancements to prefix-limit and accepted-prefix-limit configuration statements, and updates to show bgp neighbor command (PTX10001-36MR, PTX10003, PTX10004, PTX10008, QFX5130-32CD, QFX5130-48C, and QFX5220)— Starting in Junos OS Evolved Release 21.3R1, the prefix-limit and accepted-prefix-limit configuration statements include the following options:

    • drop-excess <percentage>—If you include the drop-excess <percentage> option and specify a percentage, the excess routes are dropped when the number of prefixes exceeds the specified percentage.
    • hide-excess <percentage>—If you include the hide-excess <percentage> option and specify a percentage, the excess routes are hidden when the number of prefixes exceeds the specified percentage.

    We have enhanced the show bgp neighbor command to display the following additional information:

    • Count of prefixes that are dropped or hidden based on network layer reachability information (NLRI) when the maximum number of allowed prefixes threshold is exceeded
    • Alerts when a peer starts to drop or hide routes
    • Configuration details of the prefix-limit and accepted-prefix-limit statements

    [See prefix-limit, accepted-prefix-limit, show bgp neighbor, and Multiprotocol BGP.]

  • Support for MPLS import policy (PTX10008)—Starting in Junos OS Evolved Release 21.3R1, the mpls-import policy-name CLI configuration statement at the [edit routing-options resolution rib rib-name] hierarchy level enables multi-path scenarios where a node-SID label points to multiple forwarding paths. The mpls-import policy-name configuration statement applies the resolution import policy for next-hop resolution.

    [See resolution.]