bfd-liveness-detection

Syntax

bfd-liveness-detection {authentication {algorithm algorithm-name;key-chain key-chain-name;loose-check;}detection-time {threshold milliseconds;}full-neighbors-onlyminimum-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 (ospf | ospf3) area area-id interface interface-name],[edit logical-systems logical-system-name protocols ospf3 realm (ipv4-unicast | ipv4-multicast | ipv6-multicast) area area-id interface interface-name],[edit logical-systems logical-system-name routing-instances routing-instance-name protocols (ospf | ospf3) area area-id interface interface-name],[edit logical-systems logical-system-name routing-instances routing-instance-name protocols ospf3 realm (ipv4-unicast | ipv4-multicast | ipv6-multicast) area area-id interface interface-name],[edit protocols (ospf | ospf3) area area-id interface interface-name],[edit protocols ospf3 realm (ipv4-unicast | ipv4-multicast | ipv6-multicast) area area-id interface interface-name],[edit routing-instances routing-instance-name protocols (ospf | ospf3) area area-id interface interface-name],[edit routing-instances routing-instance-name protocols ospf3 realm (ipv4-unicast | ipv4-multicast | ipv6-multicast) area area-id interface interface-name]

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 statement introduced in Junos OS Release 9.0.

no-adaptation statement 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 statement introduced in Junos OS Release 9.5.

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

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

Description

Configure bidirectional failure detection timers and authentication.

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. 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.

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 intervals at 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.

Range: 1 through 255,000 milliseconds

minimum-receive-interval milliseconds—Configure only the minimum interval at which the routing device expects to receive a reply from a neighbor with which it has established a BFD session.

Range: 1 through 255,000 milliseconds

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

Range: 1 through 255

Default: 3

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 a threshold. When the BFD session transmit interval adapts to a value greater than the threshold, a single trap and a single system log message are sent. The interval threshold must be greater than the minimum transmit interval.

Range: 0 through 4,294,967,295 (2³² – 1)

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.

Range: 1 through 255,000

version—Specify the BFD version to detect.

Range: 1 (BFD version 1) or automatic (autodetect version)

Default: automatic

The remaining statements are explained separately.

Required Privilege Level

routing—To view this statement in the configuration.

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