This read-only object reports how much time remains before this session's keepalive hold timer expires. Watching it lets an admin see how close an active session is to being declared down due to a missed keepalive, which is useful when diagnosing intermittent PCEP connectivity. If pcePcepSessionKeepAliveHoldTimeRem is counting down toward zero repeatedly without resetting after each keepalive, that pattern would point to keepalive messages from the peer arriving late or being dropped.