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lldpd returned negative age because of the late time sync by ntpd
hwclock of the system was set to future, lldpd process started before the ntpd could re-adjust the time back.
Negative age is seen because the hwclock of the system being forward in time and the system time is later reset to correct time by ntpd. But the lldp agent for one of the interfaces started before ntpd sync and thus the init time is forward in time causing the age to be negative.
Fix#572.
However, this break two things:
- existing client comparing the age to the non-monotonic clock
- SNMP agent which should report time since start time which is not
monotonic either
Bug description
lldpd returned negative age because of the late time sync by ntpd
hwclock of the system was set to future, lldpd process started before the ntpd could re-adjust the time back.
Negative age is seen because the hwclock of the system being forward in time and the system time is later reset to correct time by ntpd. But the lldp agent for one of the interfaces started before ntpd sync and thus the init time is forward in time causing the age to be negative.
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