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List: dhcp-users
Subject: Fwd: iaprefix entries aren't pruned in dhclient6.leases
From: Chris Dumont <chrisdumont () telus ! net>
Date: 2017-10-13 18:48:55
Message-ID: 5B9898D8-1FE1-4427-9EF8-38D81EDFC187 () mail ! zoo
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> Begin forwarded message:
>
> From: Chris Dumont <chrisd@mail.zoo>
> Subject: iaprefix entries aren't pruned in dhclient6.leases
> Date: October 13, 2017 at 11:30:53 PDT
> To: dhcp-users@lists.isc.org
>
> Hi,
>
> I'm using Debian package isc-dhcp-client 4.3.5-3. The dhcp server is my ISP and so \
> I have no control over that end. See below for what happens when starting dhclient \
> and the latest lease6 declaration from the dhclient6.leases file. When a new lease6 \
> is appended to the file expired iaprefix entries aren't being trimmed. During a \
> RENEW6 all of the expired iaprefix(es) are rewritten into the lease6 declaration.
> Additionally, the transcript below of an INIT-REBOOT doesn't show the whole story. \
> The run-parts dhclient-{enter,exit}-hooks.d goes through "X" (number of iaprefix \
> entries) BOUND6 invocations followed by "X-1" DEPREF6 and "X-1" EXPIRE6 \
> invocations.
> Is this a bug or is there something I need to configure? I suppose I could edit and \
> re-edit dhclient6.leases from time to time. For the time being I've written some \
> kludgy scripts to work around this.
> Thanks,
> Chris
>
> The following is somewhat anonymized:
>
> root@firewall:~$ dhclient -6 -P -v eth0.4
> Internet Systems Consortium DHCP Client 4.3.5
> Copyright 2004-2016 Internet Systems Consortium.
> All rights reserved.
> For info, please visit https://www.isc.org/software/dhcp/
>
> Listening on Socket/eth0.4
> Sending on Socket/eth0.4
> PRC: Confirming active lease (INIT-REBOOT).
> XMT: Forming Rebind, 0 ms elapsed.
> XMT: X-- IA_PD 4e:02:74:7e
> XMT: | X-- Requested renew +3600
> XMT: | X-- Requested rebind +5400
> XMT: | | X-- IAPREFIX 2001:db8:7997:1b00::/56
> XMT: | | | X-- Preferred lifetime +7200
> XMT: | | | X-- Max lifetime +7500
> XMT: | | X-- IAPREFIX 2001:db8:7993:200::/56
> XMT: | | | X-- Preferred lifetime +7200
> XMT: | | | X-- Max lifetime +7500
> XMT: | | X-- IAPREFIX 2001:db8:7993:1100::/56
> XMT: | | | X-- Preferred lifetime +7200
> XMT: | | | X-- Max lifetime +7500
> XMT: | | X-- IAPREFIX 2001:db8:7993:5d00::/56
> XMT: | | | X-- Preferred lifetime +7200
> XMT: | | | X-- Max lifetime +7500
> XMT: | | X-- IAPREFIX 2001:db8:7993:f600::/56
> XMT: | | | X-- Preferred lifetime +7200
> XMT: | | | X-- Max lifetime +7500
> XMT: | | X-- IAPREFIX 2001:db8:7996:2d00::/56
> XMT: | | | X-- Preferred lifetime +7200
> XMT: | | | X-- Max lifetime +7500
> XMT: | | X-- IAPREFIX 2001:db8:7996:9600::/56
> XMT: | | | X-- Preferred lifetime +7200
> XMT: | | | X-- Max lifetime +7500
> XMT: | | X-- IAPREFIX 2001:db8:7997:300::/56
> XMT: | | | X-- Preferred lifetime +7200
> XMT: | | | X-- Max lifetime +7500
> XMT: | | X-- IAPREFIX 2001:db8:7997:1400::/56
> XMT: | | | X-- Preferred lifetime +7200
> XMT: | | | X-- Max lifetime +7500
> XMT: | | X-- IAPREFIX 2001:db8:7997:1a00::/56
> XMT: | | | X-- Preferred lifetime +7200
> XMT: | | | X-- Max lifetime +7500
> XMT: | | X-- IAPREFIX 2001:db8:7997:1c00::/56RCV: Reply message on eth0.4 from \
> fe80::8626:2bff:fedb:5f8b.
> RCV: X-- IA_PD 4e:02:74:7e
> RCV: | X-- starts 1507917549
> RCV: | X-- t1 - renew +7200
> RCV: | X-- t2 - rebind +10800
> RCV: | X-- [Options]
> RCV: | | X-- IAPREFIX 2001:db8:7997:1b00::/56
> RCV: | | | X-- Preferred lifetime 0.
> RCV: | | | X-- Max lifetime 0.
> RCV: | | X-- IAPREFIX 2001:db8:7993:200::/56
> RCV: | | | X-- Preferred lifetime 0.
> RCV: | | | X-- Max lifetime 0.
> RCV: | | X-- IAPREFIX 2001:db8:7993:1100::/56
> RCV: | | | X-- Preferred lifetime 0.
> RCV: | | | X-- Max lifetime 0.
> RCV: | | X-- IAPREFIX 2001:db8:7993:5d00::/56
> RCV: | | | X-- Preferred lifetime 0.
> RCV: | | | X-- Max lifetime 0.
> RCV: | | X-- IAPREFIX 2001:db8:7993:f600::/56
> RCV: | | | X-- Preferred lifetime 0.
> RCV: | | | X-- Max lifetime 0.
> RCV: | | X-- IAPREFIX 2001:db8:7996:2d00::/56
> RCV: | | | X-- Preferred lifetime 0.
> RCV: | | | X-- Max lifetime 0.
> RCV: | | X-- IAPREFIX 2001:db8:7996:9600::/56
> RCV: | | | X-- Preferred lifetime 0.
> RCV: | | | X-- Max lifetime 0.
> RCV: | | X-- IAPREFIX 2001:db8:7997:300::/56
> RCV: | | | X-- Preferred lifetime 0.
> RCV: | | | X-- Max lifetime 0.
> RCV: | | X-- IAPREFIX 2001:db8:7997:1400::/56
> RCV: | | | X-- Preferred lifetime 0.
> RCV: | | | X-- Max lifetime 0.
> RCV: | | X-- IAPREFIX 2001:db8:7997:1a00::/56
> RCV: | | | X-- Preferred lifetime 0.
> RCV: | | | X-- Max lifetime 0.
> RCV: | | X-- IAPREFIX 2001:db8:7997:1c00::/56
> RCV: | | | X-- Preferred lifetime 0.
> RCV: | | | X-- Max lifetime 0.
> RCV: | | X-- IAPREFIX 2001:db8:7994:d500::/56
> RCV: | | | X-- Preferred lifetime 14400.
> RCV: | | | X-- Max lifetime 14700.
> RCV: X-- Server ID: 00:03:00:01:84:26:2b:db:5f:8b
> PRC: Bound to lease 00:03:00:01:84:26:2b:db:5f:8b.
> XMT: | | | X-- Preferred lifetime +7200
> XMT: | | | X-- Max lifetime +7500
> XMT: | | X-- IAPREFIX 2001:db8:7994:d500::/56
> XMT: | | | X-- Preferred lifetime +7200
> XMT: | | | X-- Max lifetime +7500
> XMT: V IA_PD appended.
> XMT: Rebind on eth0.4, interval 1000ms.
>
> from /var/lib/dhcp/dhclient6.leases (again somewhat anonymized):
>
> lease6 {
> interface "eth0.4";
> ia-pd 4e:02:74:7e {
> starts 1507917549;
> renew 7200;
> rebind 10800;
> iaprefix 2001:db8:7997:1b00::/56 {
> starts 1507917549;
> preferred-life 0;
> max-life 0;
> }
> iaprefix 2001:db8:7993:200::/56 {
> starts 1507917549;
> preferred-life 0;
> max-life 0;
> }
> iaprefix 2001:db8:7993:1100::/56 {
> starts 1507917549;
> preferred-life 0;
> max-life 0;
> }
> iaprefix 2001:db8:7993:5d00::/56 {
> starts 1507917549;
> preferred-life 0;
> max-life 0;
> }
> iaprefix 2001:db8:7993:f600::/56 {
> starts 1507917549;
> preferred-life 0;
> max-life 0;
> }
> iaprefix 2001:db8:7996:2d00::/56 {
> starts 1507917549;
> preferred-life 0;
> max-life 0;
> }
> iaprefix 2001:db8:7996:9600::/56 {
> starts 1507917549;
> preferred-life 0;
> max-life 0;
> }
> iaprefix 2001:db8:7997:300::/56 {
> starts 1507917549;
> preferred-life 0;
> max-life 0;
> }
> iaprefix 2001:db8:7997:1400::/56 {
> starts 1507917549;
> preferred-life 0;
> max-life 0;
> }
> iaprefix 2001:db8:7997:1a00::/56 {
> starts 1507917549;
> preferred-life 0;
> max-life 0;
> }
> }
> iaprefix 2001:db8:7997:1c00::/56 {
> starts 1507917549;
> preferred-life 0;
> max-life 0;
> }
> iaprefix 2001:db8:7994:d500::/56 {
> starts 1507917549;
> preferred-life 14400;
> max-life 14700;
> }
> }
> option dhcp6.client-id 0:3:0:1:f0:ad:4e:2:74:7e;
> option dhcp6.server-id 0:3:0:1:84:26:2b:db:5f:8b;
> option dhcp6.name-servers 2001:db8:ff09:10a::55,2001:db8:ff09:10a::114;
> }
>
>
[Attachment #5 (unknown)]
<html><head><meta http-equiv="Content-Type" content="text/html \
charset=utf-8"></head><body style="word-wrap: break-word; -webkit-nbsp-mode: space; \
-webkit-line-break: after-white-space;" class=""><br class=""><div style=""><br \
class=""><blockquote type="cite" class=""><div class="">Begin forwarded \
message:</div><br class="Apple-interchange-newline"><div style="margin-top: 0px; \
margin-right: 0px; margin-bottom: 0px; margin-left: 0px;" class=""><span \
style="font-family: -webkit-system-font, Helvetica Neue, Helvetica, sans-serif; \
color:rgba(0, 0, 0, 1.0);" class=""><b class="">From: </b></span><span \
style="font-family: -webkit-system-font, Helvetica Neue, Helvetica, sans-serif;" \
class="">Chris Dumont <<a href="mailto:chrisd@mail.zoo" \
class="">chrisd@mail.zoo</a>><br class=""></span></div><div style="margin-top: \
0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px;" class=""><span \
style="font-family: -webkit-system-font, Helvetica Neue, Helvetica, sans-serif; \
color:rgba(0, 0, 0, 1.0);" class=""><b class="">Subject: </b></span><span \
style="font-family: -webkit-system-font, Helvetica Neue, Helvetica, sans-serif;" \
class=""><b class="">iaprefix entries aren't pruned in dhclient6.leases</b><br \
class=""></span></div><div style="margin-top: 0px; margin-right: 0px; margin-bottom: \
0px; margin-left: 0px;" class=""><span style="font-family: -webkit-system-font, \
Helvetica Neue, Helvetica, sans-serif; color:rgba(0, 0, 0, 1.0);" class=""><b \
class="">Date: </b></span><span style="font-family: -webkit-system-font, Helvetica \
Neue, Helvetica, sans-serif;" class="">October 13, 2017 at 11:30:53 PDT<br \
class=""></span></div><div style="margin-top: 0px; margin-right: 0px; margin-bottom: \
0px; margin-left: 0px;" class=""><span style="font-family: -webkit-system-font, \
Helvetica Neue, Helvetica, sans-serif; color:rgba(0, 0, 0, 1.0);" class=""><b \
class="">To: </b></span><span style="font-family: -webkit-system-font, Helvetica \
Neue, Helvetica, sans-serif;" class=""><a href="mailto:dhcp-users@lists.isc.org" \
class="">dhcp-users@lists.isc.org</a><br class=""></span></div><br class=""><div \
class=""><div dir="auto" style="word-wrap: break-word; -webkit-nbsp-mode: space; \
-webkit-line-break: after-white-space;" class="">Hi,<div class=""><br \
class=""></div><div class="">I'm using Debian package isc-dhcp-client 4.3.5-3. \
The dhcp server is my ISP and so I have no control over that end. See below for what \
happens when starting dhclient and the latest lease6 declaration from the \
dhclient6.leases file. When a new lease6 is appended to the file expired iaprefix \
entries aren't being trimmed. During a RENEW6 all of the expired iaprefix(es) are \
rewritten into the lease6 declaration. </div><div class=""><br \
class=""></div><div class="">Additionally, the transcript below of an INIT-REBOOT \
doesn't show the whole story. The run-parts dhclient-{enter,exit}-hooks.d goes \
through "X" (number of iaprefix entries) BOUND6 invocations followed by "X-1" DEPREF6 \
and "X-1" EXPIRE6 invocations.</div><div class=""><br class=""></div><div class="">Is \
this a bug or is there something I need to configure? I suppose I could edit and \
re-edit dhclient6.leases from time to time. For the time being I've written some \
kludgy scripts to work around this.</div><div class=""><br class=""></div><div \
class="">Thanks,</div><div class="">Chris</div><div class=""><br class=""></div><div \
class="">The following is somewhat anonymized:</div><div class=""><br \
class=""></div><div class=""><div class="">root@firewall:~$ dhclient -6 -P -v \
eth0.4</div><div class="">Internet Systems Consortium DHCP Client 4.3.5</div><div \
class="">Copyright 2004-2016 Internet Systems Consortium.</div><div class="">All \
rights reserved.</div><div class="">For info, please visit <a \
href="https://www.isc.org/software/dhcp/" \
class="">https://www.isc.org/software/dhcp/</a></div><div class=""><br \
class=""></div><div class="">Listening on Socket/eth0.4</div><div class="">Sending on \
Socket/eth0.4</div><div class="">PRC: Confirming active lease \
(INIT-REBOOT).</div><div class="">XMT: Forming Rebind, 0 ms elapsed.</div><div \
class="">XMT: X-- IA_PD 4e:02:74:7e</div><div class="">XMT: | X-- \
Requested renew +3600</div><div class="">XMT: | X-- Requested rebind \
+5400</div><div class="">XMT: | | X-- IAPREFIX \
2001:db8:7997:1b00::/56</div><div class="">XMT: | | | X-- Preferred lifetime \
+7200</div><div class="">XMT: | | | X-- Max lifetime +7500</div><div \
class="">XMT: | | X-- IAPREFIX 2001:db8:7993:200::/56</div><div class="">XMT: \
| | | X-- Preferred lifetime +7200</div><div class="">XMT: | | | X-- Max \
lifetime +7500</div><div class="">XMT: | | X-- IAPREFIX \
2001:db8:7993:1100::/56</div><div class="">XMT: | | | X-- Preferred lifetime \
+7200</div><div class="">XMT: | | | X-- Max lifetime +7500</div><div \
class="">XMT: | | X-- IAPREFIX 2001:db8:7993:5d00::/56</div><div class="">XMT: \
| | | X-- Preferred lifetime +7200</div><div class="">XMT: | | | X-- Max \
lifetime +7500</div><div class="">XMT: | | X-- IAPREFIX \
2001:db8:7993:f600::/56</div><div class="">XMT: | | | X-- Preferred lifetime \
+7200</div><div class="">XMT: | | | X-- Max lifetime +7500</div><div \
class="">XMT: | | X-- IAPREFIX 2001:db8:7996:2d00::/56</div><div class="">XMT: \
| | | X-- Preferred lifetime +7200</div><div class="">XMT: | | | X-- Max \
lifetime +7500</div><div class="">XMT: | | X-- IAPREFIX \
2001:db8:7996:9600::/56</div><div class="">XMT: | | | X-- Preferred lifetime \
+7200</div><div class="">XMT: | | | X-- Max lifetime +7500</div><div \
class="">XMT: | | X-- IAPREFIX 2001:db8:7997:300::/56</div><div class="">XMT: \
| | | X-- Preferred lifetime +7200</div><div class="">XMT: | | | X-- Max \
lifetime +7500</div><div class="">XMT: | | X-- IAPREFIX \
2001:db8:7997:1400::/56</div><div class="">XMT: | | | X-- Preferred lifetime \
+7200</div><div class="">XMT: | | | X-- Max lifetime +7500</div><div \
class="">XMT: | | X-- IAPREFIX 2001:db8:7997:1a00::/56</div><div class="">XMT: \
| | | X-- Preferred lifetime +7200</div><div class="">XMT: | | | X-- Max \
lifetime +7500</div><div class="">XMT: | | X-- IAPREFIX \
2001:db8:7997:1c00::/56RCV: Reply message on eth0.4 from \
fe80::8626:2bff:fedb:5f8b.</div><div class="">RCV: X-- IA_PD \
4e:02:74:7e</div><div class="">RCV: | X-- starts 1507917549</div><div \
class="">RCV: | X-- t1 - renew +7200</div><div class="">RCV: | X-- \
t2 - rebind +10800</div><div class="">RCV: | X-- [Options]</div><div \
class="">RCV: | | X-- IAPREFIX 2001:db8:7997:1b00::/56</div><div class="">RCV: \
| | | X-- Preferred lifetime 0.</div><div class="">RCV: | | | X-- Max \
lifetime 0.</div><div class="">RCV: | | X-- IAPREFIX \
2001:db8:7993:200::/56</div><div class="">RCV: | | | X-- Preferred lifetime \
0.</div><div class="">RCV: | | | X-- Max lifetime 0.</div><div class="">RCV: \
| | X-- IAPREFIX 2001:db8:7993:1100::/56</div><div class="">RCV: | | | \
X-- Preferred lifetime 0.</div><div class="">RCV: | | | X-- Max lifetime \
0.</div><div class="">RCV: | | X-- IAPREFIX 2001:db8:7993:5d00::/56</div><div \
class="">RCV: | | | X-- Preferred lifetime 0.</div><div class="">RCV: | | \
| X-- Max lifetime 0.</div><div class="">RCV: | | X-- IAPREFIX \
2001:db8:7993:f600::/56</div><div class="">RCV: | | | X-- Preferred lifetime \
0.</div><div class="">RCV: | | | X-- Max lifetime 0.</div><div class="">RCV: \
| | X-- IAPREFIX 2001:db8:7996:2d00::/56</div><div class="">RCV: | | | \
X-- Preferred lifetime 0.</div><div class="">RCV: | | | X-- Max lifetime \
0.</div><div class="">RCV: | | X-- IAPREFIX 2001:db8:7996:9600::/56</div><div \
class="">RCV: | | | X-- Preferred lifetime 0.</div><div class="">RCV: | | \
| X-- Max lifetime 0.</div><div class="">RCV: | | X-- IAPREFIX \
2001:db8:7997:300::/56</div><div class="">RCV: | | | X-- Preferred lifetime \
0.</div><div class="">RCV: | | | X-- Max lifetime 0.</div><div class="">RCV: \
| | X-- IAPREFIX 2001:db8:7997:1400::/56</div><div class="">RCV: | | | \
X-- Preferred lifetime 0.</div><div class="">RCV: | | | X-- Max lifetime \
0.</div><div class="">RCV: | | X-- IAPREFIX 2001:db8:7997:1a00::/56</div><div \
class="">RCV: | | | X-- Preferred lifetime 0.</div><div class="">RCV: | | \
| X-- Max lifetime 0.</div><div class="">RCV: | | X-- IAPREFIX \
2001:db8:7997:1c00::/56</div><div class="">RCV: | | | X-- Preferred lifetime \
0.</div><div class="">RCV: | | | X-- Max lifetime 0.</div><div class="">RCV: \
| | X-- IAPREFIX 2001:db8:7994:d500::/56</div><div class="">RCV: | | | \
X-- Preferred lifetime 14400.</div><div class="">RCV: | | | X-- Max lifetime \
14700.</div><div class="">RCV: X-- Server ID: \
00:03:00:01:84:26:2b:db:5f:8b</div><div class="">PRC: Bound to lease \
00:03:00:01:84:26:2b:db:5f:8b.</div><div class="">XMT: | | | X-- Preferred \
lifetime +7200</div><div class="">XMT: | | | X-- Max lifetime +7500</div><div \
class="">XMT: | | X-- IAPREFIX 2001:db8:7994:d500::/56</div><div class="">XMT: \
| | | X-- Preferred lifetime +7200</div><div class="">XMT: | | | X-- Max \
lifetime +7500</div><div class="">XMT: V IA_PD appended.</div><div \
class="">XMT: Rebind on eth0.4, interval 1000ms.</div></div><div class=""><br \
class=""></div><div class="">from /var/lib/dhcp/dhclient6.leases (again somewhat \
anonymized):</div><div class=""><br class=""></div><div class=""><div class="">lease6 \
{</div><div class=""> interface "eth0.4";</div><div class=""> ia-pd \
4e:02:74:7e {</div><div class=""> starts 1507917549;</div><div \
class=""> renew 7200;</div><div class=""> rebind \
10800;</div><div class=""> iaprefix 2001:db8:7997:1b00::/56 {</div><div \
class=""> starts 1507917549;</div><div class=""> \
preferred-life 0;</div><div class=""> max-life \
0;</div><div class=""> }</div><div class=""> iaprefix \
2001:db8:7993:200::/56 {</div><div class=""> starts \
1507917549;</div><div class=""> preferred-life 0;</div><div \
class=""> max-life 0;</div><div class=""> \
}</div><div class=""> iaprefix 2001:db8:7993:1100::/56 {</div><div \
class=""> starts 1507917549;</div><div class=""> \
preferred-life 0;</div><div class=""> max-life \
0;</div><div class=""> }</div><div class=""> iaprefix \
2001:db8:7993:5d00::/56 {</div><div class=""> starts \
1507917549;</div><div class=""> preferred-life 0;</div><div \
class=""> max-life 0;</div><div class=""> \
}</div><div class=""> iaprefix 2001:db8:7993:f600::/56 {</div><div \
class=""> starts 1507917549;</div><div class=""> \
preferred-life 0;</div><div class=""> max-life \
0;</div><div class=""> }</div><div class=""> iaprefix \
2001:db8:7996:2d00::/56 {</div><div class=""> starts \
1507917549;</div><div class=""> preferred-life 0;</div><div \
class=""> max-life 0;</div><div class=""> \
}</div><div class=""> iaprefix 2001:db8:7996:9600::/56 {</div><div \
class=""> starts 1507917549;</div><div class=""> \
preferred-life 0;</div><div class=""> max-life \
0;</div><div class=""> }</div><div class=""> iaprefix \
2001:db8:7997:300::/56 {</div><div class=""> starts \
1507917549;</div><div class=""> preferred-life 0;</div><div \
class=""> max-life 0;</div><div class=""> \
}</div><div class=""> iaprefix 2001:db8:7997:1400::/56 {</div><div \
class=""> starts 1507917549;</div><div class=""> \
preferred-life 0;</div><div class=""> max-life \
0;</div><div class=""> }</div><div class=""> iaprefix \
2001:db8:7997:1a00::/56 {</div><div class=""> starts \
1507917549;</div><div class=""> preferred-life 0;</div><div \
class=""> max-life 0;</div><div class=""> \
}</div></div><div class=""><div class=""> }</div><div class=""> \
iaprefix 2001:db8:7997:1c00::/56 {</div><div class=""> \
starts 1507917549;</div><div class=""> preferred-life \
0;</div><div class=""> max-life 0;</div><div class=""> \
}</div><div class=""> iaprefix 2001:db8:7994:d500::/56 \
{</div><div class=""> starts 1507917549;</div><div \
class=""> preferred-life 14400;</div><div class=""> \
max-life 14700;</div><div class=""> }</div><div class=""> \
}</div><div class=""> option dhcp6.client-id \
0:3:0:1:f0:ad:4e:2:74:7e;</div><div class=""> option dhcp6.server-id \
0:3:0:1:84:26:2b:db:5f:8b;</div><div class=""> option dhcp6.name-servers \
2001:db8:ff09:10a::55,2001:db8:ff09:10a::114;</div><div class="">}</div></div><div \
class=""><br class=""></div><div class=""><br \
class=""></div></div></div></blockquote></div><br class=""></body></html>
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