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<p class="MsoNormal"><span lang="EN-US">Hi,<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">For issue “dhclient doesn't renew IP address lease after system time changes”<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">dhcp version: 4.4.1<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">bind version: 9.11<o:p></o:p></span></p>
<p><span lang="EN-US">Check relative issue:<br>
<a href="https://bugzilla.redhat.com/show_bug.cgi?id=1729211" target="_blank">https://bugzilla.redhat.com/show_bug.cgi?id=1729211</a><br>
<a href="https://bugzilla.redhat.com/show_bug.cgi?id=1093803" target="_blank">https://bugzilla.redhat.com/show_bug.cgi?id=1093803</a><br>
<a href="https://bugzilla.redhat.com/show_bug.cgi?id=916116" target="_blank">https://bugzilla.redhat.com/show_bug.cgi?id=916116</a><o:p></o:p></span></p>
<p><span lang="EN-US">Patches is dhcp-system_time_changed.patch for dhcp and bind-9.11-rh1732883.patch for bind.<br>
<a href="https://git.centos.org/rpms/dhcp/blob/c7/f/SOURCES/dhcp-system_time_changed.patch" target="_blank">https://git.centos.org/rpms/dhcp/blob/c7/f/SOURCES/dhcp-system_time_changed.patch</a><o:p></o:p></span></p>
<p class="MsoNormal" align="left" style="text-align:left"><span lang="EN" style="font-size:12.0pt;font-family:SimSun">There was a discussion in history, redhat has a related fix,
<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><a href="https://lists.isc.org/mailman/htdig/dhcp-users/2014-September/018174.html">https://lists.isc.org/mailman/htdig/dhcp-users/2014-September/018174.html</a><o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<pre><span lang="EN">I backport patch,patch use monotonic time</span><span lang="EN-US"> replace gettimeofday<o:p></o:p></span></pre>
<p class="MsoNormal" align="left" style="text-align:left"><span lang="EN" style="font-size:12.0pt;font-family:SimSun">but dhcpv6 still seems to lose the global address, and there is no merge patch upstream.</span><span lang="EN-US" style="font-size:12.0pt;font-family:SimSun"><o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<pre><span lang="EN-US">backward jump/forward jump<o:p></o:p></span></pre>
<pre><span lang="EN-US">#date <o:p></o:p></span></pre>
<pre><span lang="EN-US">Tue Jun 20 11:04:53 UTC 2023<o:p></o:p></span></pre>
<pre><span lang="EN-US">#date -s "Tue Jun 20 08:04:53 UTC 2023"<o:p></o:p></span></pre>
<pre><span lang="EN-US">Tue Jun 20 08:04:53 UTC 2023<o:p></o:p></span></pre>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal" align="left" style="text-align:left"><span lang="EN-US" style="font-size:12.0pt;font-family:SimSun">~# ifconfig eth0<o:p></o:p></span></p>
<p class="MsoNormal" align="left" style="text-align:left"><span lang="EN-US" style="font-size:12.0pt;font-family:SimSun">eth0 Link encap:Ethernet HWaddr 58:77:78:80:F0:55
<o:p></o:p></span></p>
<p class="MsoNormal" align="left" style="text-align:left"><span lang="EN-US" style="font-size:12.0pt;font-family:SimSun"> inet6 addr: fdc0:2001:dd8:10::2/128 Scope:Global<o:p></o:p></span></p>
<p class="MsoNormal" align="left" style="text-align:left"><span lang="EN-US" style="font-size:12.0pt;font-family:SimSun"> inet6 addr: fe80::5100:7fff:fe8f:f055/64 Scope:Link<o:p></o:p></span></p>
<p class="MsoNormal" align="left" style="text-align:left"><span lang="EN-US" style="font-size:12.0pt;font-family:SimSun"> UP BROADCAST RUNNING MTU:2000 Metric:1<o:p></o:p></span></p>
<p class="MsoNormal" align="left" style="text-align:left"><span lang="EN-US" style="font-size:12.0pt;font-family:SimSun"> RX packets:231 errors:0 dropped:0 overruns:0 frame:0<o:p></o:p></span></p>
<p class="MsoNormal" align="left" style="text-align:left"><span lang="EN-US" style="font-size:12.0pt;font-family:SimSun"> TX packets:368 errors:0 dropped:0 overruns:0 carrier:0<o:p></o:p></span></p>
<p class="MsoNormal" align="left" style="text-align:left"><span lang="EN-US" style="font-size:12.0pt;font-family:SimSun"> collisions:0 txqueuelen:1000
<o:p></o:p></span></p>
<p class="MsoNormal" align="left" style="text-align:left"><span lang="EN-US" style="font-size:12.0pt;font-family:SimSun"> RX bytes:24290 (23.7 KiB) TX bytes:253899 (247.9 KiB)<o:p></o:p></span></p>
<p class="MsoNormal" align="left" style="text-align:left"><span lang="EN-US" style="font-size:12.0pt;font-family:SimSun"><o:p> </o:p></span></p>
<p class="MsoNormal" align="left" style="text-align:left"><span lang="EN-US" style="font-size:12.0pt;font-family:SimSun"><o:p></o:p></span></p>
<p class="MsoNormal" align="left" style="text-align:left"><span lang="EN-US" style="font-size:12.0pt;font-family:SimSun"><o:p> </o:p></span></p>
<p class="MsoNormal" align="left" style="text-align:left"><span lang="EN-US" style="font-size:12.0pt;font-family:SimSun">ifconfig eth0<o:p></o:p></span></p>
<p class="MsoNormal" align="left" style="text-align:left"><span lang="EN-US" style="font-size:12.0pt;font-family:SimSun">eth0 Link encap:Ethernet HWaddr 58:77:78:80:F0:55
<o:p></o:p></span></p>
<p class="MsoNormal" align="left" style="text-align:left"><span lang="EN-US" style="font-size:12.0pt;font-family:SimSun"> inet6 addr: fe80::5100:7fff:fe8f:f055/64 Scope:Link<o:p></o:p></span></p>
<p class="MsoNormal" align="left" style="text-align:left"><span lang="EN-US" style="font-size:12.0pt;font-family:SimSun"> UP BROADCAST RUNNING MTU:2000 Metric:1<o:p></o:p></span></p>
<p class="MsoNormal" align="left" style="text-align:left"><span lang="EN-US" style="font-size:12.0pt;font-family:SimSun"> RX packets:298 errors:0 dropped:0 overruns:0 frame:0<o:p></o:p></span></p>
<p class="MsoNormal" align="left" style="text-align:left"><span lang="EN-US" style="font-size:12.0pt;font-family:SimSun"> TX packets:506 errors:0 dropped:0 overruns:0 carrier:0<o:p></o:p></span></p>
<p class="MsoNormal" align="left" style="text-align:left"><span lang="EN-US" style="font-size:12.0pt;font-family:SimSun"> collisions:0 txqueuelen:1000
<o:p></o:p></span></p>
<p class="MsoNormal" align="left" style="text-align:left"><span lang="EN-US" style="font-size:12.0pt;font-family:SimSun"> RX bytes:29286 (28.5 KiB) TX bytes:435628 (425.4 KiB)<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<pre><span lang="EN-US">Many thanks in advance,<o:p></o:p></span></pre>
<p class="MsoNormal"><span lang="EN-US">BR/SK<o:p></o:p></span></p>
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