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bfd-liveness-detection (Protocols OSPF)

Syntax

Hierarchy Level

Release Information

Statement introduced before Junos OS Release 7.4.

Statement introduced in Junos OS Release 9.0 for EX Series switches.

detection-time threshold and transmit-interval threshold options added in Junos OS Release 8.2.

Support for logical systems introduced in Junos OS Release 8.3.

no-adaptation option introduced in Junos OS Release 9.0.

no-adaptation option introduced in Junos OS Release 9.0 for EX Series switches.

Support for OSPFv3 introduced in Junos OS Release 9.3.

Support for OSPFv3 introduced in Junos OS Release 9.3 for EX Series switches.

full-neighbors-only option introduced in Junos OS Release 9.5.

full-neighbors-only option introduced in Junos OS Release 9.5 for EX Series switches.

authentication algorithm, authentication key-chain, and authentication loose-check options introduced in Junos OS Release 9.6.

Statement introduced in Junos OS Release 12.1 for the QFX Series.

Description

Configure bidirectional failure detection timers and authentication for OSPF.

The remaining statements are explained separately.

Options

authentication algorithm algorithm-name —Configure the algorithm used to authenticate the specified BFD session: simple-password, keyed-md5, keyed-sha-1, meticulous-keyed-md5, or meticulous-keyed-sha-1.

authentication key-chain key-chain-name—Associate a security key with the specified BFD session using the name of the security keychain. The name you specify must match one of the keychains configured in the authentication-key-chains key-chain statement at the [edit security] hierarchy level.

authentication loose-check—(Optional) Configure loose authentication checking on the BFD session. Use only for transitional periods when authentication may not be configured at both ends of the BFD session.

detection-time threshold milliseconds—Configure a threshold for the adaptation of the BFD session detection time. When the detection time adapts to a value equal to or greater than the threshold, a single trap and a single system log message are sent.

full-neighbors-only—Establish BFD sessions only for OSPF neighbors in the full state. The default behavior is to establish BFD sessions for all OSPF neighbors.

minimum-interval milliseconds—Configure the minimum interval after which the local routing device transmits a hello packet and then expects to receive a reply from the neighbor with which it has established a BFD session. Optionally, instead of using this statement, you can configure the minimum transmit and receive intervals separately using the transmit-interval minimum-interval and minimum-receive-interval statements.

minimum-receive-interval milliseconds—Configure the minimum interval after which the routing device expects to receive a reply from a neighbor with which it has established a BFD session. Optionally, instead of using this statement, you can configure the minimum receive interval using the minimum-interval statement.

multiplier number—Configure the number of hello packets not received by a neighbor that causes the originating interface to be declared down.

no-adaptation—Specify that BFD sessions should not adapt to changing network conditions. We recommend that you not disable BFD adaptation unless it is preferable not to have BFD adaptation enabled in your network.

transmit-interval threshold milliseconds—Configure the threshold for the adaptation of the BFD session transmit interval. When the 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 the minimum interval at which the routing device transmits hello packets to a neighbor with which it has established a BFD session. Optionally, instead of using this statement, you can configure the minimum transmit interval using the minimum-interval statement.

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

Required Privilege Level

routing—To view this statement in the configuration.

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