High Availability
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Multihop BFD echo-lite sessions for distributed and inline modes (MX960 and MX2010)—Starting in Junos OS Release 24.2R1, programmable RPD (PRPD) BFD APIs support multihop BFD echo-lite sessions in distributed and inline modes. Multihop BFD echo-lite sessions are used to probe the liveliness of peer devices that are multiple hops away, even if the peer device does not support BFD.
[See show bfd session extensive.]