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Routing Options

  • Enhancements to prefix-limit and accepted-prefix-limit configuration statements, and updates to show bgp neighbor command (ACX1000, EX9200, MX Series, PTX5000, and QFX10002)— Starting from Junos OS Release 21.2R1, 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.

    The show bgp neighbor command has been enhanced to display the following additional information:

    • Count of prefixes that are dropped or hidden based on network layer reachability information (NLRI) when the maximum 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 configuration statements.

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