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uplink-failure-detection (Junos Fusion)



Hierarchy Level

Release Information

Statement introduced in Junos OS Release 14.2R3.


Enables uplink failure detection in a Junos Fusion.

The uplink failure detection feature on a Junos Fusion enables satellite devices to detect link failures on the uplink interfaces used to connect to aggregation devices. When uplink failure detection detects uplink failure on a satellite device, all of the device’s extended ports (which connect to host devices) are shut down. Shutting down the extended ports allows downstream host devices to more quickly identify and adapt to the outage. For example, when a host device is connected to two satellite devices, and uplink failure detection shuts down the extended ports on one satellite device, the host device can more quickly recognize the uplink failure and redirect traffic through the other, active satellite device.

You can configure uplink failure detection in a Junos Fusion for a single satellite device using the fpc slot-id option. If uplink failure detection is enabled without specifying the fpc slot-id option, uplink failure detection is enabled for all cascade ports on the aggregation device.

If you enable uplink failure detection without the candidate-uplink-policy substatement, the default uplink failure detection settings are applied. To configure non-default uplink failure detection settings, include the candidate-uplink-policy substatement. Candidate uplink policies are configured under [edit policy-options satellite-policies candidate-uplink-port-policy].


Uplink failure detection is disabled.


The remaining statements are explained separately.

Required Privilege Level

admin—To view this statement in the configuration.

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