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<div dir="ltr"><div><div><div><div><div><div><div>Hello, <br></div><div>  we have met the following network setup problem. <br></div>A shift of the system time to the past leads to the incorrect long sleep of the dhclient. <br></div>Step by step reproduction:<br></div><br></div><div>1. obtain address via dhclient at timestamp t1;<br></div>2. shift system time  to the past to timestamp t2;<br></div></div>3.  bug: dhclient misses renew operation. it is sleeping in &#39;select&#39; for &quot;lease time&quot;/2 + (t1 - t2) seconds.<br><br></div><div>Time shift can be great, for example in setting up local time on guest linux OSes in some hypervisors.  It consequently leads to the losing address of the interface. <br><br></div>--
<div><pre>Best regards,
Vladimir Kunschikov
Lead software developer
InfoTeCS JSC
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