bfd-liveness-detection

Syntax

bfd-liveness-detection {authentication {algorithm algorithm-name;key-chain key-chain-name;<loose-check>;}detection-time {threshold milliseconds;}holddown-interval milliseconds;minimum-interval milliseconds;minimum-receive-interval milliseconds;multiplier number;no-adaptation;transmit-interval {threshold milliseconds;minimum-interval milliseconds;}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 OS Release 8.1.

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

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

Support for logical routers introduced in Junos OS Release 8.3.

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

holddown-interval statement introduced in Junos OS 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 OS Release 9.0.

Support for BFD authentication introduced in Junos OS Release 9.6.

Description

Configure bidirectional failure detection timers and authentication.

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

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

holddown-interval milliseconds—Configure an interval specifying how long a BFD session must remain up before a state change notification is sent.

Range: 0 through 255,000

Default: 0

minimum-interval milliseconds—Configure the minimum intervals at which the local routing device transmits hello packets and then expects to receive a reply from a neighbor with which it has established a BFD session.

Range: 1 through 255,000

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

Range: 1 through 255,000

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—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.

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

transmit-interval minimum-interval milliseconds—Configure only the minimum interval at which the local routing device transmits hello packets to a neighbor with which it has established a BFD session.

Range: 1 through 255,000

version—Configure the BFD version to detect.

Range: 1 or automatic (autodetect the BFD 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.

bfd-liveness-detection

Syntax

Hierarchy Level

Release Information

Description

Options

Required Privilege Level

Related Topics