You have localtime in your hardware clock, right? Can you try setting UTC=yes in /etc/default/rcS? This could be related to bug #33968. Otherwise, I see your lease time is 2 hours (7200s), so it might be the renewal fails. Anything in /var/log/daemon.log?
You have localtime in your hardware clock, right? Can you try setting UTC=yes in /etc/default/rcS? This could be related to bug #33968. Otherwise, I see your lease time is 2 hours (7200s), so it might be the renewal fails. Anything in /var/log/ daemon. log?