It sounds like your gateway isn't properly syncing its time via NTP. Try manually forcing an NTP sync (sudo ntpdate -u pool.ntp.org) or check if the GPS module (if used) provides a valid time reference. Also, verify the packet forwarder settings.
Comments
It sounds like your gateway isn't properly syncing its time via NTP. Try manually forcing an NTP sync (sudo ntpdate -u pool.ntp.org) or check if the GPS module (if used) provides a valid time reference. Also, verify the packet forwarder settings.