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bfd-liveness-detection

Syntax



bfd-liveness-detection {


detection-time {
threshold milliseconds;
}


holddown-interval milliseconds;
minimum-interval milliseconds;
minimum-receive-interval milliseconds;

no-adaptation;


transmit-interval {
threshold milliseconds;
minimum-interval milliseconds;
}


multiplier number;
version (1 | automatic);
}

Hierarchy Level



[edit logical-systems logical-system-name protocols bgp],
[edit logical-systems logical-system-name protocols bgp group group-name],
[edit logical-systems logical-system-name protocols bgp group group-name neighbor address],
[edit logical-systems logical-system-name routing-instances routing-instance-name protocols
bgp],
[edit logical-systems logical-system-name routing-instances routing-instance-name protocols
bgp group group-name],
[edit logical-systems logical-system-name routing-instances routing-instance-name protocols
bgp group group-name neighbor address],
[edit protocols bgp],
[edit protocols bgp group group-name],
[edit protocols bgp group group-name neighbor address],
[edit routing-instances routing-instance-name protocols bgp],
[edit routing-instances routing-instance-name protocols bgp group group-name],
[edit routing-instances routing-instance-name protocols bgp group group-name neighbor address]

Release Information

Statement introduced in JUNOS Release 8.1.

detection-time threshold and transmit-interval threshold options
introduced in JUNOS Release 8.2

Support for logical routers introduced in JUNOS Release 8.3.

Support for IBGP and multihop EBGP sessions introduced in JUNOS Release 8.3.

holddown-interval statement introduced in JUNOS Release 8.5. You can configure this statement only for EBGP peers at the [edit protocols bgp group group-name neighbor address] hierarchy level.

no-adaptation statement introduced in JUNOS Release 9.0.

Description

Configure bidirectional failure detection timers.

For IBGP and multihop EBGP support configure the bfd-liveness-detection statement at the global [edit bgp protocols] hierarchy level. You can also configure IBGP and multihop support for a routing instance or a logical system.

Options

detection-time threshold milliseconds—Configure a threshold. When the BFD session detection time adapts to a value equal to or greater than the threshold, a single trap and a single system log message are sent.
holddown-interval milliseconds—Configure an interval specifying how long a BFD session must remain up before a state change notification is sent.
minimum-interval milliseconds—Configure the minimum intervals at which the local router transmits hello packets and then expects to receive a reply from a neighbor with which it has established a BFD session.
minimum-receive-interval milliseconds— Configure only the minimum interval at which the local router expects to receive a reply from a neighbor with which it has established a BFD session.
multiplier number—Configure the number of hello packets not received by a neighbor that causes the originating interface to be declared down.
no-adaptation—Configure BFD sessions not to adapt to changing network conditions. We recommend that you not disable BFD adaptation unless it is preferable to not to have BFD adaptation enabled in your network.
transmit-interval threshold milliseconds—Configure a threshold. When the BFD session transmit interval adapts to a value greater than the threshold, a single trap and a single system message are sent. The interval threshold must be greater than the minimum transmit interval.
transmit-interval minimum-interval milliseconds—Configure only the minimum interval at which the local router transmits hello packets to a neighbor with which it has established a BFD session.
version—Configure the BFD version to detect.

Usage Guidelines

See Configuring the BFD Protocol.

Required Privilege Level

routing—To view this statement in the configuration.

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

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