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    bfd-liveness-detection (LAG)


    bfd-liveness-detection {authentication {algorithm algorithm-name;key-chain key-chain-name;loose-check;}detection-time {threshold milliseconds;}holddown-interval milliseconds;local-address bfd-local-address;minimum-interval milliseconds;minimum-receive-interval milliseconds;multiplier number;neighbor bfd-neighbor-address;no-adaptation;transmit-interval {minimum-interval milliseconds;threshold milliseconds;}version (1 | automatic);}

    Hierarchy Level

    [edit interfaces aex aggregated-ether-options]

    Release Information

    Statement introduced in Junos OS Release 13.3.


    Configure Bidirectional Forwarding Detection (BFD) timers and authentication for aggregated Ethernet interfaces.


    holddown-interval milliseconds

    Specify a time limit, in milliseconds, indicating the time that a BFD session remains up before a state change notification is sent. If the BFD session goes down and then comes back up during the hold-down interval, the timer is restarted.

    Range: 0 through 255,000

    Default: 0

    local-address bfd-local-address

    Specify the loopback address or the AE interface address of the source of the BFD session.

    minimum-interval milliseconds

    Specify a minimum time interval after which the local routing device transmits a BFD packet and then expects to receive a reply from the BFD neighbor. Optionally, instead of using this statement, you can configure the minimum transmit and receive intervals separately using the transmit-interval minimum-interval statement.

    Range: 1 through 255,000

    minimum-receive-interval milliseconds

    Specify the minimum time interval after which the routing device expects to receive a reply from the BFD neighbor.

    Range: 1 through 255,000

    multiplier number

    Specify the number of BFD packets that were not received by the BFD neighbor before the originating interface is declared down.

    Range: 1 through 255

    neighbor bfd-neighbor-address

    Specify the loopback address or the AE interface address of a remote destination to send BFD packets.


    Disable the BFD adaptation. Include this statement if you do not want the BFD sessions to adapt to changing network conditions. We recommend that you do not disable BFD adaptation unless it is preferable not to have BFD adaptation enabled in your network.


    Configure the BFD version to detect (BFD version 1) or autodetect (the BFD version).

    Default: automatic

    The remaining statements are explained separately.

    Required Privilege Level

    interface—To view this statement in the configuration.

    interface-control—To add this statement to the configuration.

    Modified: 2016-03-29