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    ip pim bfd-liveness-detection

    Syntax

    ip pim bfd-liveness-detection [ minimum-interval minInterval |
    [ minimum-receive-interval minRecInterval ]
    [ minimum-transmit-interval minTransInterval ] ] [ multiplier multValue ]

    no ip pim bfd-liveness-detection

    Release Information

    Command introduced in JunosE Release 8.0.0.

    Description

    Enables BFD (bidirectional forwarding detection) on an interface running PIM and defines BFD values to be negotiated between PIM neighbors for detection of IP data path failures. You can change the BFD liveness detection parameters at any time without stopping or restarting the existing session; BFD automatically adjusts to the new parameter value. However, no changes to BFD parameters take place until the values resynchronize with each neighbor. The no version disables BFD on the PIM interface.

    Note: BFD sessions might not be maintained when the multiplier value is 1 and configured intervals are very short. We recommend that you do not use a multiplier value of 1 with very short intervals.

    Options

    • minInterval—Minimum proposed transmit interval and required receive interval for BFD control packets; has the same effect as configuring the minimum receive interval and the minimum transmit interval to the same value; number in the range 100–65535 milliseconds—for ES2 4G LM only, the range is 10–65535 milliseconds; default value is 300 milliseconds
    • minRecInterval—Minimum interval at which the local peer must receive BFD control packets sent by the remote peer; number in the range 100–65535 milliseconds—for ES2 4G LM only, the range is 10–65535 milliseconds; default value is 300 milliseconds
    • minTransInterval—Minimum proposed interval between BFD control packets sent by the local peer; number in the range 100–65535 milliseconds—for ES2 4G LM only, the range is 10–65535 milliseconds; default value is 300 milliseconds
    • multValue—Detection multiplier value that the remote neighbor multiplies by the local router's negotiated transmit interval to determine the remote neighbor's BFD liveness detection interval. The calculated BFD liveness detection interval can be different on each neighbor. The multiplier value is roughly equivalent to the number of packets that can be missed before the BFD session is declared to be down. The number ranges from 1-25 and the default value is 3.

    Mode

    Interface Configuration

    Published: 2014-08-14