Inline link fault management

Junos OS supports inline mode for OAM link fault management (LFM). Inline LFM delegates the transmission and receipt of LFM keepalive packets from the periodic packet management (ppm) process on the line card to the forwarding ASIC (that is, to the hardware). Inline LFM reduces the load on the ppm process and can support LFM in-service software upgrade (ISSU) for non-Juniper peers (for a keepalive interval of 1 second). 

You can enable inline LFM by including the hardware-assisted-keepalives configuration statement at the [edit protocols oam ethernet link-fault-management] hierarchy level. To disable inline LFM, delete the hardware-assisted-keepalives statement. The show oam ethernet link-fault-management detail command displays the keepalive packet statistics. Starting from Release 18.4R1, when inline LFM is enabled, the keepalive packet statistics are not updated. In earlier releases, the show oam ethernet link-fault-management detail command displayed the keepalive packet statistics.