From: Francis Dupont <fdupont@isc.org>
Date: Sat, 1 Aug 2020 11:37:30 +0000 (+0200)
Subject: [#1329] Added allocating subnet change
X-Git-Tag: Kea-1.8.0~130
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=4deea1b9451bac35829433fa333c7b838451f40c;p=thirdparty%2Fkea.git

[#1329] Added allocating subnet change
---

diff --git a/doc/devel/images/currentHost4.png b/doc/devel/images/currentHost4.png
index 1e6e379f77..577e61b3d8 100644
Binary files a/doc/devel/images/currentHost4.png and b/doc/devel/images/currentHost4.png differ
diff --git a/doc/devel/images/currentHost4.svg b/doc/devel/images/currentHost4.svg
index f41db828d7..ec300489ec 100644
--- a/doc/devel/images/currentHost4.svg
+++ b/doc/devel/images/currentHost4.svg
@@ -1,22 +1,25 @@
-<?xml version="1.0" encoding="UTF-8" standalone="no"?><svg xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" contentScriptType="application/ecmascript" contentStyleType="text/css" height="1823px" preserveAspectRatio="none" style="width:969px;height:1823px;" version="1.1" viewBox="0 0 969 1823" width="969px" zoomAndPan="magnify"><defs><filter height="300%" id="f162kmmt1mna5z" width="300%" x="-1" y="-1"><feGaussianBlur result="blurOut" stdDeviation="2.0"/><feColorMatrix in="blurOut" result="blurOut2" type="matrix" values="0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 .4 0"/><feOffset dx="4.0" dy="4.0" in="blurOut2" result="blurOut3"/><feBlend in="SourceGraphic" in2="blurOut3" mode="normal"/></filter></defs><g><text fill="#000000" font-family="sans-serif" font-size="18" lengthAdjust="spacingAndGlyphs" textLength="288" x="331.75" y="17.4023">currentHost DHCPv4 (Kea 1.7.11)</text><!--MD5=[e3476fda087b0512b1cf4e3a66ca5e59]
-entity entry--><rect fill="#FEFECE" filter="url(#f162kmmt1mna5z)" height="36.4883" style="stroke: #A80036; stroke-width: 1.5;" width="134" x="314.5" y="28.1992"/><text fill="#000000" font-family="sans-serif" font-size="14" lengthAdjust="spacingAndGlyphs" textLength="114" x="324.5" y="51.7344">Subnet Selection</text><!--MD5=[f65ad2d20ed779f8ee7fa3e9ca8ab4c3]
-entity setSelected--><rect fill="#FEFECE" filter="url(#f162kmmt1mna5z)" height="36.4883" style="stroke: #A80036; stroke-width: 1.5;" width="247" x="258" y="125.1992"/><text fill="#000000" font-family="sans-serif" font-size="14" lengthAdjust="spacingAndGlyphs" textLength="227" x="268" y="148.7344">Set subnet to the selected subnet</text><!--MD5=[c0678c1aaf89874ea821e39d7ef5404f]
-entity clientid_lookup--><rect fill="#FEFECE" filter="url(#f162kmmt1mna5z)" height="36.4883" style="stroke: #A80036; stroke-width: 1.5;" width="245" x="259" y="222.1992"/><text fill="#000000" font-family="sans-serif" font-size="14" lengthAdjust="spacingAndGlyphs" textLength="225" x="269" y="245.7344">Has client a lease for its client id?</text><!--MD5=[a51c27fcfb0c2b9388b266a7e30efdf3]
-entity clientid_iterate--><rect fill="#FEFECE" filter="url(#f162kmmt1mna5z)" height="36.4883" style="stroke: #A80036; stroke-width: 1.5;" width="283" x="7" y="319.1992"/><text fill="#000000" font-family="sans-serif" font-size="14" lengthAdjust="spacingAndGlyphs" textLength="263" x="17" y="342.7344">Iterate on allowed subnets for client id</text><!--MD5=[96d14c76c72fae1f84c71c464af0f0e6]
-entity found_clientid--><rect fill="#FEFECE" filter="url(#f162kmmt1mna5z)" height="36.4883" style="stroke: #A80036; stroke-width: 1.5;" width="253" x="22" y="498.1992"/><text fill="#000000" font-family="sans-serif" font-size="14" lengthAdjust="spacingAndGlyphs" textLength="233" x="32" y="521.7344">Set subnet to the by client id lease</text><!--MD5=[9f5518b92d1482f0724c659635bb4f8f]
-entity hwaddr_lookup--><rect fill="#FEFECE" filter="url(#f162kmmt1mna5z)" height="36.4883" style="stroke: #A80036; stroke-width: 1.5;" width="211" x="449" y="432.1992"/><text fill="#000000" font-family="sans-serif" font-size="14" lengthAdjust="spacingAndGlyphs" textLength="191" x="459" y="455.7344">Has client a matching lease?</text><!--MD5=[7366630e5488cbc20c26d829a87e86ca]
-entity hwaddr_iterate--><rect fill="#FEFECE" filter="url(#f162kmmt1mna5z)" height="36.4883" style="stroke: #A80036; stroke-width: 1.5;" width="352" x="201.5" y="564.1992"/><text fill="#000000" font-family="sans-serif" font-size="14" lengthAdjust="spacingAndGlyphs" textLength="332" x="211.5" y="587.7344">Iterate on allowed subnets for hardware address</text><!--MD5=[096d593c9a7e1a0b5ae2681804d4217f]
-entity found_hwaddr--><rect fill="#FEFECE" filter="url(#f162kmmt1mna5z)" height="36.4883" style="stroke: #A80036; stroke-width: 1.5;" width="243" x="229" y="677.1992"/><text fill="#000000" font-family="sans-serif" font-size="14" lengthAdjust="spacingAndGlyphs" textLength="223" x="239" y="700.7344">Set subnet to the matching lease</text><!--MD5=[f1bd864ca92b3a59ad91e15b6c278a16]
-entity hasAddressReservation--><rect fill="#FEFECE" filter="url(#f162kmmt1mna5z)" height="36.4883" style="stroke: #A80036; stroke-width: 1.5;" width="211" x="375" y="930.1992"/><text fill="#000000" font-family="sans-serif" font-size="14" lengthAdjust="spacingAndGlyphs" textLength="191" x="385" y="953.7344">Has an address reservation?</text><!--MD5=[0af8b8cc29117b7db26a4bf8fde82b62]
-entity setAddressReservation--><rect fill="#FEFECE" filter="url(#f162kmmt1mna5z)" height="36.4883" style="stroke: #A80036; stroke-width: 1.5;" width="300" x="220.5" y="1043.1992"/><text fill="#000000" font-family="sans-serif" font-size="14" lengthAdjust="spacingAndGlyphs" textLength="280" x="230.5" y="1066.7344">Set subnet to address reservation subnet</text><!--MD5=[42a0a2711e18aa980e3ea9f910af1c90]
-entity pool--><rect fill="#FEFECE" filter="url(#f162kmmt1mna5z)" height="36.4883" style="stroke: #A80036; stroke-width: 1.5;" width="251" x="355" y="1140.1992"/><text fill="#000000" font-family="sans-serif" font-size="14" lengthAdjust="spacingAndGlyphs" textLength="231" x="365" y="1163.7344">Is the address in an allowed pool?</text><!--MD5=[ec337e6f6831b541235537d1c5125816]
-entity pool_iterate--><rect fill="#FEFECE" filter="url(#f162kmmt1mna5z)" height="36.4883" style="stroke: #A80036; stroke-width: 1.5;" width="269" x="141" y="1237.1992"/><text fill="#000000" font-family="sans-serif" font-size="14" lengthAdjust="spacingAndGlyphs" textLength="249" x="151" y="1260.7344">Iterate on allowed subnets with pool</text><!--MD5=[8426a0f58e3c900bd89aafdc516c0a64]
-entity inAllowedPool--><rect fill="#FEFECE" filter="url(#f162kmmt1mna5z)" height="36.4883" style="stroke: #A80036; stroke-width: 1.5;" width="254" x="148.5" y="1350.1992"/><text fill="#000000" font-family="sans-serif" font-size="14" lengthAdjust="spacingAndGlyphs" textLength="234" x="158.5" y="1373.7344">Set subnet to address pool subnet</text><!--MD5=[a2ab21a8d09e419da8ba4e22e422b87f]
-entity getHRmode--><rect fill="#FEFECE" filter="url(#f162kmmt1mna5z)" height="36.4883" style="stroke: #A80036; stroke-width: 1.5;" width="252" x="346.5" y="1447.1992"/><text fill="#000000" font-family="sans-serif" font-size="14" lengthAdjust="spacingAndGlyphs" textLength="232" x="356.5" y="1470.7344">Get subnet host reservation mode</text><!--MD5=[9e66760393f24350dd53d10577644815]
-entity checkHRmode--><rect fill="#FEFECE" filter="url(#f162kmmt1mna5z)" height="36.4883" style="stroke: #A80036; stroke-width: 1.5;" width="293" x="326" y="1544.1992"/><text fill="#000000" font-family="sans-serif" font-size="14" lengthAdjust="spacingAndGlyphs" textLength="273" x="336" y="1567.7344">Is subnet host reservation mode global?</text><!--MD5=[9225881c05e5dcc29801826dc3c4a44b]
-entity global--><rect fill="#FEFECE" filter="url(#f162kmmt1mna5z)" height="36.4883" style="stroke: #A80036; stroke-width: 1.5;" width="205" x="250" y="1657.1992"/><text fill="#000000" font-family="sans-serif" font-size="14" lengthAdjust="spacingAndGlyphs" textLength="185" x="260" y="1680.7344">Get global host reservation</text><!--MD5=[fb2193611fca68211907294b61bd1772]
-entity bySubnet--><rect fill="#FEFECE" filter="url(#f162kmmt1mna5z)" height="36.4883" style="stroke: #A80036; stroke-width: 1.5;" width="209" x="490" y="1657.1992"/><text fill="#000000" font-family="sans-serif" font-size="14" lengthAdjust="spacingAndGlyphs" textLength="189" x="500" y="1680.7344">Get subnet host reservation</text><!--MD5=[c13398c59c328d6fcc544c8c17f5b117]
-entity return--><rect fill="#FEFECE" filter="url(#f162kmmt1mna5z)" height="36.4883" style="stroke: #A80036; stroke-width: 1.5;" width="235" x="355" y="1770.1992"/><text fill="#000000" font-family="sans-serif" font-size="14" lengthAdjust="spacingAndGlyphs" textLength="215" x="365" y="1793.7344">Return current host reservation</text><!--MD5=[4190d3dcd511d21b11bd238065bcb30b]
+<?xml version="1.0" encoding="UTF-8" standalone="no"?><svg xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" contentScriptType="application/ecmascript" contentStyleType="text/css" height="2163px" preserveAspectRatio="none" style="width:969px;height:2163px;" version="1.1" viewBox="0 0 969 2163" width="969px" zoomAndPan="magnify"><defs><filter height="300%" id="fukfijbnkkysb" width="300%" x="-1" y="-1"><feGaussianBlur result="blurOut" stdDeviation="2.0"/><feColorMatrix in="blurOut" result="blurOut2" type="matrix" values="0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 .4 0"/><feOffset dx="4.0" dy="4.0" in="blurOut2" result="blurOut3"/><feBlend in="SourceGraphic" in2="blurOut3" mode="normal"/></filter></defs><g><text fill="#000000" font-family="sans-serif" font-size="18" lengthAdjust="spacingAndGlyphs" textLength="288" x="331.75" y="17.4023">currentHost DHCPv4 (Kea 1.7.11)</text><!--MD5=[e3476fda087b0512b1cf4e3a66ca5e59]
+entity entry--><rect fill="#FEFECE" filter="url(#fukfijbnkkysb)" height="36.4883" style="stroke: #A80036; stroke-width: 1.5;" width="134" x="314.5" y="28.1992"/><text fill="#000000" font-family="sans-serif" font-size="14" lengthAdjust="spacingAndGlyphs" textLength="114" x="324.5" y="51.7344">Subnet Selection</text><!--MD5=[f65ad2d20ed779f8ee7fa3e9ca8ab4c3]
+entity setSelected--><rect fill="#FEFECE" filter="url(#fukfijbnkkysb)" height="36.4883" style="stroke: #A80036; stroke-width: 1.5;" width="247" x="258" y="125.1992"/><text fill="#000000" font-family="sans-serif" font-size="14" lengthAdjust="spacingAndGlyphs" textLength="227" x="268" y="148.7344">Set subnet to the selected subnet</text><!--MD5=[c0678c1aaf89874ea821e39d7ef5404f]
+entity clientid_lookup--><rect fill="#FEFECE" filter="url(#fukfijbnkkysb)" height="36.4883" style="stroke: #A80036; stroke-width: 1.5;" width="245" x="259" y="222.1992"/><text fill="#000000" font-family="sans-serif" font-size="14" lengthAdjust="spacingAndGlyphs" textLength="225" x="269" y="245.7344">Has client a lease for its client id?</text><!--MD5=[a51c27fcfb0c2b9388b266a7e30efdf3]
+entity clientid_iterate--><rect fill="#FEFECE" filter="url(#fukfijbnkkysb)" height="36.4883" style="stroke: #A80036; stroke-width: 1.5;" width="283" x="7" y="319.1992"/><text fill="#000000" font-family="sans-serif" font-size="14" lengthAdjust="spacingAndGlyphs" textLength="263" x="17" y="342.7344">Iterate on allowed subnets for client id</text><!--MD5=[96d14c76c72fae1f84c71c464af0f0e6]
+entity found_clientid--><rect fill="#FEFECE" filter="url(#fukfijbnkkysb)" height="36.4883" style="stroke: #A80036; stroke-width: 1.5;" width="253" x="22" y="498.1992"/><text fill="#000000" font-family="sans-serif" font-size="14" lengthAdjust="spacingAndGlyphs" textLength="233" x="32" y="521.7344">Set subnet to the by client id lease</text><!--MD5=[9f5518b92d1482f0724c659635bb4f8f]
+entity hwaddr_lookup--><rect fill="#FEFECE" filter="url(#fukfijbnkkysb)" height="36.4883" style="stroke: #A80036; stroke-width: 1.5;" width="211" x="449" y="432.1992"/><text fill="#000000" font-family="sans-serif" font-size="14" lengthAdjust="spacingAndGlyphs" textLength="191" x="459" y="455.7344">Has client a matching lease?</text><!--MD5=[7366630e5488cbc20c26d829a87e86ca]
+entity hwaddr_iterate--><rect fill="#FEFECE" filter="url(#fukfijbnkkysb)" height="36.4883" style="stroke: #A80036; stroke-width: 1.5;" width="352" x="201.5" y="564.1992"/><text fill="#000000" font-family="sans-serif" font-size="14" lengthAdjust="spacingAndGlyphs" textLength="332" x="211.5" y="587.7344">Iterate on allowed subnets for hardware address</text><!--MD5=[096d593c9a7e1a0b5ae2681804d4217f]
+entity found_hwaddr--><rect fill="#FEFECE" filter="url(#fukfijbnkkysb)" height="36.4883" style="stroke: #A80036; stroke-width: 1.5;" width="243" x="229" y="677.1992"/><text fill="#000000" font-family="sans-serif" font-size="14" lengthAdjust="spacingAndGlyphs" textLength="223" x="239" y="700.7344">Set subnet to the matching lease</text><!--MD5=[f1bd864ca92b3a59ad91e15b6c278a16]
+entity hasAddressReservation--><rect fill="#FEFECE" filter="url(#fukfijbnkkysb)" height="36.4883" style="stroke: #A80036; stroke-width: 1.5;" width="211" x="375" y="930.1992"/><text fill="#000000" font-family="sans-serif" font-size="14" lengthAdjust="spacingAndGlyphs" textLength="191" x="385" y="953.7344">Has an address reservation?</text><!--MD5=[0af8b8cc29117b7db26a4bf8fde82b62]
+entity setAddressReservation--><rect fill="#FEFECE" filter="url(#fukfijbnkkysb)" height="36.4883" style="stroke: #A80036; stroke-width: 1.5;" width="300" x="220.5" y="1043.1992"/><text fill="#000000" font-family="sans-serif" font-size="14" lengthAdjust="spacingAndGlyphs" textLength="280" x="230.5" y="1066.7344">Set subnet to address reservation subnet</text><!--MD5=[42a0a2711e18aa980e3ea9f910af1c90]
+entity pool--><rect fill="#FEFECE" filter="url(#fukfijbnkkysb)" height="36.4883" style="stroke: #A80036; stroke-width: 1.5;" width="251" x="355" y="1140.1992"/><text fill="#000000" font-family="sans-serif" font-size="14" lengthAdjust="spacingAndGlyphs" textLength="231" x="365" y="1163.7344">Is the address in an allowed pool?</text><!--MD5=[ec337e6f6831b541235537d1c5125816]
+entity pool_iterate--><rect fill="#FEFECE" filter="url(#fukfijbnkkysb)" height="36.4883" style="stroke: #A80036; stroke-width: 1.5;" width="269" x="141" y="1237.1992"/><text fill="#000000" font-family="sans-serif" font-size="14" lengthAdjust="spacingAndGlyphs" textLength="249" x="151" y="1260.7344">Iterate on allowed subnets with pool</text><!--MD5=[8426a0f58e3c900bd89aafdc516c0a64]
+entity inAllowedPool--><rect fill="#FEFECE" filter="url(#fukfijbnkkysb)" height="36.4883" style="stroke: #A80036; stroke-width: 1.5;" width="254" x="148.5" y="1350.1992"/><text fill="#000000" font-family="sans-serif" font-size="14" lengthAdjust="spacingAndGlyphs" textLength="234" x="158.5" y="1373.7344">Set subnet to address pool subnet</text><!--MD5=[c7571992746652353b375880ae850124]
+entity allocate--><rect fill="#FEFECE" filter="url(#fukfijbnkkysb)" height="36.4883" style="stroke: #A80036; stroke-width: 1.5;" width="158" x="393.5" y="1447.1992"/><text fill="#000000" font-family="sans-serif" font-size="14" lengthAdjust="spacingAndGlyphs" textLength="138" x="403.5" y="1470.7344">Allocate a new lease</text><!--MD5=[539657d7008b7b9e186112fa27fe2a64]
+entity allocate_iterate--><rect fill="#FEFECE" filter="url(#fukfijbnkkysb)" height="36.4883" style="stroke: #A80036; stroke-width: 1.5;" width="201" x="232" y="1560.1992"/><text fill="#000000" font-family="sans-serif" font-size="14" lengthAdjust="spacingAndGlyphs" textLength="181" x="242" y="1583.7344">Iterate on allowed subnets</text><!--MD5=[98bd7f0fd78ffed8e2b0c08f2369be38]
+entity allocated--><rect fill="#FEFECE" filter="url(#fukfijbnkkysb)" height="36.4883" style="stroke: #A80036; stroke-width: 1.5;" width="266" x="270.5" y="1673.1992"/><text fill="#000000" font-family="sans-serif" font-size="14" lengthAdjust="spacingAndGlyphs" textLength="246" x="280.5" y="1696.7344">Set subnet to allocated lease subnet</text><!--MD5=[a2ab21a8d09e419da8ba4e22e422b87f]
+entity getHRmode--><rect fill="#FEFECE" filter="url(#fukfijbnkkysb)" height="36.4883" style="stroke: #A80036; stroke-width: 1.5;" width="252" x="394.5" y="1770.1992"/><text fill="#000000" font-family="sans-serif" font-size="14" lengthAdjust="spacingAndGlyphs" textLength="232" x="404.5" y="1793.7344">Get subnet host reservation mode</text><!--MD5=[9e66760393f24350dd53d10577644815]
+entity checkHRmode--><rect fill="#FEFECE" filter="url(#fukfijbnkkysb)" height="36.4883" style="stroke: #A80036; stroke-width: 1.5;" width="293" x="374" y="1867.1992"/><text fill="#000000" font-family="sans-serif" font-size="14" lengthAdjust="spacingAndGlyphs" textLength="273" x="384" y="1890.7344">Is subnet host reservation mode global?</text><!--MD5=[9225881c05e5dcc29801826dc3c4a44b]
+entity global--><rect fill="#FEFECE" filter="url(#fukfijbnkkysb)" height="36.4883" style="stroke: #A80036; stroke-width: 1.5;" width="205" x="298" y="1980.1992"/><text fill="#000000" font-family="sans-serif" font-size="14" lengthAdjust="spacingAndGlyphs" textLength="185" x="308" y="2003.7344">Get global host reservation</text><!--MD5=[fb2193611fca68211907294b61bd1772]
+entity bySubnet--><rect fill="#FEFECE" filter="url(#fukfijbnkkysb)" height="36.4883" style="stroke: #A80036; stroke-width: 1.5;" width="209" x="538" y="1980.1992"/><text fill="#000000" font-family="sans-serif" font-size="14" lengthAdjust="spacingAndGlyphs" textLength="189" x="548" y="2003.7344">Get subnet host reservation</text><!--MD5=[c13398c59c328d6fcc544c8c17f5b117]
+entity return--><rect fill="#FEFECE" filter="url(#fukfijbnkkysb)" height="36.4883" style="stroke: #A80036; stroke-width: 1.5;" width="235" x="403" y="2093.1992"/><text fill="#000000" font-family="sans-serif" font-size="14" lengthAdjust="spacingAndGlyphs" textLength="215" x="413" y="2116.7344">Return current host reservation</text><!--MD5=[4190d3dcd511d21b11bd238065bcb30b]
 link entry to setSelected--><path d="M381.5,64.6192 C381.5,80.1592 381.5,102.9792 381.5,119.8592 " fill="none" id="entry-&gt;setSelected" style="stroke: #A80036; stroke-width: 1.0;"/><polygon fill="#A80036" points="381.5,124.8892,385.5,115.8892,381.5,119.8892,377.5,115.8892,381.5,124.8892" style="stroke: #A80036; stroke-width: 1.0;"/><!--MD5=[e08d915304835ed62ca4e0728c34eef1]
 link setSelected to clientid_lookup--><path d="M381.5,161.6192 C381.5,177.1592 381.5,199.9792 381.5,216.8592 " fill="none" id="setSelected-&gt;clientid_lookup" style="stroke: #A80036; stroke-width: 1.0;"/><polygon fill="#A80036" points="381.5,221.8892,385.5,212.8892,381.5,216.8892,377.5,212.8892,381.5,221.8892" style="stroke: #A80036; stroke-width: 1.0;"/><!--MD5=[6be1f2e9e03fb1c5265b47f0fe05d4fb]
 link clientid_lookup to hwaddr_lookup--><path d="M450.66,258.2792 C487.31,270.2592 530.95,289.5492 561.5,319.1992 C589.76,346.6192 605.63,365.0792 592.5,402.1992 C589.19,411.5492 583.15,420.3992 576.84,427.8492 " fill="none" id="clientid_lookup-&gt;hwaddr_lookup" style="stroke: #A80036; stroke-width: 1.0;"/><polygon fill="#A80036" points="573.32,431.8292,582.2724,427.7238,576.6267,428.0788,576.2717,422.4331,573.32,431.8292" style="stroke: #A80036; stroke-width: 1.0;"/><text fill="#000000" font-family="sans-serif" font-size="13" lengthAdjust="spacingAndGlyphs" textLength="116" x="591.5" y="342.2676">no client id option</text><!--MD5=[e88e8ce2e61ddfe0f17d6f35f9f4b567]
@@ -32,19 +35,24 @@ link hwaddr_iterate to found_hwaddr--><path d="M373.28,600.5392 C368.61,619.7692
 link found_hwaddr to hasAddressReservation--><path d="M359.44,713.4492 C382.5,757.9792 443.99,876.6992 469.34,925.6492 " fill="none" id="found_hwaddr-&gt;hasAddressReservation" style="stroke: #A80036; stroke-width: 1.0;"/><polygon fill="#A80036" points="471.67,930.1592,471.0846,920.3278,469.3713,925.7189,463.9802,924.0056,471.67,930.1592" style="stroke: #A80036; stroke-width: 1.0;"/><!--MD5=[419c32f3c11394d82c4ebd3db00104c7]
 link hwaddr_iterate to hasAddressReservation--><path d="M433.87,600.2492 C475.7,616.7892 525.5,646.4992 525.5,694.1992 C525.5,694.1992 525.5,694.1992 525.5,869.1992 C525.5,890.4892 512.76,911.2092 500.84,925.9292 " fill="none" id="hwaddr_iterate-&gt;hasAddressReservation" style="stroke: #A80036; stroke-width: 1.0;"/><polygon fill="#A80036" points="497.51,929.9192,506.343,925.5627,500.7095,926.0769,500.1953,920.4435,497.51,929.9192" style="stroke: #A80036; stroke-width: 1.0;"/><text fill="#000000" font-family="sans-serif" font-size="13" lengthAdjust="spacingAndGlyphs" textLength="62" x="526.5" y="803.7676">not found</text><!--MD5=[1a9e971bc87c9d378000ad9b2e367c91]
 link hasAddressReservation to setAddressReservation--><path d="M463.31,966.5392 C443.86,986.1792 412.17,1018.1492 391.33,1039.1792 " fill="none" id="hasAddressReservation-&gt;setAddressReservation" style="stroke: #A80036; stroke-width: 1.0;"/><polygon fill="#A80036" points="387.57,1042.9792,396.7481,1039.4066,391.0912,1039.4295,391.0684,1033.7726,387.57,1042.9792" style="stroke: #A80036; stroke-width: 1.0;"/><text fill="#000000" font-family="sans-serif" font-size="13" lengthAdjust="spacingAndGlyphs" textLength="21" x="432.5" y="1009.7676">yes</text><!--MD5=[d42a4bd24fb375c431deb7abe8a74e17]
-link hasAddressReservation to pool--><path d="M497.22,966.4192 C518.88,990.8992 552.33,1037.4392 538.5,1079.1992 C531.33,1100.8692 515.54,1121.4192 502.24,1135.9792 " fill="none" id="hasAddressReservation-&gt;pool" style="stroke: #A80036; stroke-width: 1.0;"/><polygon fill="#A80036" points="498.57,1139.9292,507.6356,1136.0803,501.9821,1136.2744,501.7879,1130.6209,498.57,1139.9292" style="stroke: #A80036; stroke-width: 1.0;"/><text fill="#000000" font-family="sans-serif" font-size="13" lengthAdjust="spacingAndGlyphs" textLength="16" x="542.5" y="1066.2676">no</text><!--MD5=[791581dff43cc3b6477c496805383c47]
+link hasAddressReservation to pool--><path d="M497.22,966.4192 C518.88,990.8992 552.33,1037.4392 538.5,1079.1992 C531.33,1100.8692 515.54,1121.4192 502.24,1135.9792 " fill="none" id="hasAddressReservation-&gt;pool" style="stroke: #A80036; stroke-width: 1.0;"/><polygon fill="#A80036" points="498.57,1139.9292,507.6356,1136.0803,501.9821,1136.2744,501.7879,1130.6209,498.57,1139.9292" style="stroke: #A80036; stroke-width: 1.0;"/><text fill="#000000" font-family="sans-serif" font-size="13" lengthAdjust="spacingAndGlyphs" textLength="225" x="542.5" y="1066.2676">no or not check in the taken branch</text><!--MD5=[791581dff43cc3b6477c496805383c47]
 link setAddressReservation to pool--><path d="M390.42,1079.3992 C409.11,1095.5392 437.07,1119.6992 456.88,1136.7992 " fill="none" id="setAddressReservation-&gt;pool" style="stroke: #A80036; stroke-width: 1.0;"/><polygon fill="#A80036" points="460.73,1140.1192,456.5357,1131.2081,456.9468,1136.85,451.305,1137.2612,460.73,1140.1192" style="stroke: #A80036; stroke-width: 1.0;"/><!--MD5=[7a1241998e61cc09e6a084344a13ee40]
-link pool to pool_iterate--><path d="M443.38,1176.3992 C407.82,1192.8792 354.25,1217.7092 317.23,1234.8592 " fill="none" id="pool-&gt;pool_iterate" style="stroke: #A80036; stroke-width: 1.0;"/><polygon fill="#A80036" points="312.35,1237.1192,322.1978,1236.9736,316.8885,1235.0212,318.841,1229.712,312.35,1237.1192" style="stroke: #A80036; stroke-width: 1.0;"/><!--MD5=[599eb954f991ec4c35dac5f50073ed5c]
-link pool to getHRmode--><path d="M562.27,1176.2592 C595.56,1187.6592 630.78,1206.4492 650.5,1237.1992 C659.14,1250.6692 654.47,1257.6992 650.5,1273.1992 C636.28,1328.6892 627.14,1343.9092 588.5,1386.1992 C566.39,1410.3992 535.31,1430.7792 510.89,1444.6292 " fill="none" id="pool-&gt;getHRmode" style="stroke: #A80036; stroke-width: 1.0;"/><polygon fill="#A80036" points="506.41,1447.1392,516.2178,1446.2406,510.7747,1444.7001,512.3152,1439.2571,506.41,1447.1392" style="stroke: #A80036; stroke-width: 1.0;"/><text fill="#000000" font-family="sans-serif" font-size="13" lengthAdjust="spacingAndGlyphs" textLength="205" x="642.5" y="1316.7676">pool check is not in all branches</text><!--MD5=[f92712dd8e32c9acdf8619de922fc5cb]
+link pool to pool_iterate--><path d="M443.38,1176.3992 C407.82,1192.8792 354.25,1217.7092 317.23,1234.8592 " fill="none" id="pool-&gt;pool_iterate" style="stroke: #A80036; stroke-width: 1.0;"/><polygon fill="#A80036" points="312.35,1237.1192,322.1978,1236.9736,316.8885,1235.0212,318.841,1229.712,312.35,1237.1192" style="stroke: #A80036; stroke-width: 1.0;"/><!--MD5=[1c40abd319323f0f8c3e812984d047be]
+link pool to allocate--><path d="M562.27,1176.2592 C595.56,1187.6592 630.78,1206.4492 650.5,1237.1992 C659.14,1250.6692 654.47,1257.6992 650.5,1273.1992 C636.28,1328.6892 627.14,1343.9092 588.5,1386.1992 C566.39,1410.3992 535.31,1430.7792 510.89,1444.6292 " fill="none" id="pool-&gt;allocate" style="stroke: #A80036; stroke-width: 1.0;"/><polygon fill="#A80036" points="506.41,1447.1392,516.2178,1446.2406,510.7747,1444.7001,512.3152,1439.2571,506.41,1447.1392" style="stroke: #A80036; stroke-width: 1.0;"/><text fill="#000000" font-family="sans-serif" font-size="13" lengthAdjust="spacingAndGlyphs" textLength="205" x="642.5" y="1316.7676">pool check is not in all branches</text><!--MD5=[f92712dd8e32c9acdf8619de922fc5cb]
 link pool_iterate to pool_iterate--><path d="M410.12,1246.9692 C430.88,1248.2192 445,1250.9592 445,1255.1992 C445,1259.0792 433.2,1261.6992 415.32,1263.0692 " fill="none" id="pool_iterate-&gt;pool_iterate" style="stroke: #A80036; stroke-width: 1.0;"/><polygon fill="#A80036" points="410.12,1263.4292,419.3732,1266.8023,415.1082,1263.0862,418.8244,1258.8212,410.12,1263.4292" style="stroke: #A80036; stroke-width: 1.0;"/><text fill="#000000" font-family="sans-serif" font-size="13" lengthAdjust="spacingAndGlyphs" textLength="193" x="451" y="1260.2676">address not in an allowed pool</text><!--MD5=[89f40702130c31205e20b7afecbe9ed1]
-link pool_iterate to inAllowedPool--><path d="M275.5,1273.5392 C275.5,1292.7692 275.5,1323.8292 275.5,1344.8592 " fill="none" id="pool_iterate-&gt;inAllowedPool" style="stroke: #A80036; stroke-width: 1.0;"/><polygon fill="#A80036" points="275.5,1349.9792,279.5,1340.9792,275.5,1344.9792,271.5,1340.9792,275.5,1349.9792" style="stroke: #A80036; stroke-width: 1.0;"/><text fill="#000000" font-family="sans-serif" font-size="13" lengthAdjust="spacingAndGlyphs" textLength="168" x="276.5" y="1316.7676">address in an allowed pool</text><!--MD5=[2404f6c7b2ff699f3cb852b0289ecfae]
-link pool_iterate to getHRmode--><path d="M375.89,1273.2492 C408.78,1280.8692 439.69,1290.9192 450.5,1303.1992 C484.66,1341.9792 481.2,1407.7092 476.46,1441.9492 " fill="none" id="pool_iterate-&gt;getHRmode" style="stroke: #A80036; stroke-width: 1.0;"/><polygon fill="#A80036" points="475.7,1447.1692,480.9697,1438.8487,476.4291,1442.2227,473.0552,1437.6821,475.7,1447.1692" style="stroke: #A80036; stroke-width: 1.0;"/><text fill="#000000" font-family="sans-serif" font-size="13" lengthAdjust="spacingAndGlyphs" textLength="100" x="479.5" y="1373.2676">no allowed pool</text><!--MD5=[7343ba745f039e5847ae3e5f0fd83d75]
-link inAllowedPool to getHRmode--><path d="M311.18,1386.3992 C345.34,1402.8792 396.82,1427.7092 432.4,1444.8592 " fill="none" id="inAllowedPool-&gt;getHRmode" style="stroke: #A80036; stroke-width: 1.0;"/><polygon fill="#A80036" points="437.09,1447.1192,430.7227,1439.6054,432.5869,1444.9463,427.246,1446.8104,437.09,1447.1192" style="stroke: #A80036; stroke-width: 1.0;"/><!--MD5=[9e14dd0054774aedb71cf602d40d12b7]
-link getHRmode to checkHRmode--><path d="M472.5,1483.6192 C472.5,1499.1592 472.5,1521.9792 472.5,1538.8592 " fill="none" id="getHRmode-&gt;checkHRmode" style="stroke: #A80036; stroke-width: 1.0;"/><polygon fill="#A80036" points="472.5,1543.8892,476.5,1534.8892,472.5,1538.8892,468.5,1534.8892,472.5,1543.8892" style="stroke: #A80036; stroke-width: 1.0;"/><!--MD5=[a84b25cfb30efcca4b707749deb6e97a]
-link checkHRmode to global--><path d="M454.01,1580.2992 C432.76,1599.9592 397.87,1632.2292 375.04,1653.3492 " fill="none" id="checkHRmode-&gt;global" style="stroke: #A80036; stroke-width: 1.0;"/><polygon fill="#A80036" points="371.21,1656.8992,380.5379,1653.7384,374.8857,1653.5096,375.1145,1647.8574,371.21,1656.8992" style="stroke: #A80036; stroke-width: 1.0;"/><text fill="#000000" font-family="sans-serif" font-size="13" lengthAdjust="spacingAndGlyphs" textLength="21" x="421.5" y="1623.7676">yes</text><!--MD5=[a6bc61640de244f08df3cca17a4f2365]
-link checkHRmode to bySubnet--><path d="M491.3,1580.2992 C512.9,1599.9592 548.37,1632.2292 571.58,1653.3492 " fill="none" id="checkHRmode-&gt;bySubnet" style="stroke: #A80036; stroke-width: 1.0;"/><polygon fill="#A80036" points="575.48,1656.8992,571.5026,1647.8892,571.7771,1653.5394,566.1269,1653.8139,575.48,1656.8992" style="stroke: #A80036; stroke-width: 1.0;"/><text fill="#000000" font-family="sans-serif" font-size="13" lengthAdjust="spacingAndGlyphs" textLength="16" x="541.5" y="1623.7676">no</text><!--MD5=[b516e9f33f07fd0923019528919312cb]
-link global to return--><path d="M349.59,1693.3892 C348.2,1707.3392 348.61,1726.8292 358.5,1740.1992 C367.42,1752.2592 380,1761.2392 393.56,1767.9292 " fill="none" id="global-&gt;return" style="stroke: #A80036; stroke-width: 1.0;"/><polygon fill="#A80036" points="398.2,1770.1092,391.7564,1762.6607,393.6749,1767.9823,388.3533,1769.9008,398.2,1770.1092" style="stroke: #A80036; stroke-width: 1.0;"/><text fill="#000000" font-family="sans-serif" font-size="13" lengthAdjust="spacingAndGlyphs" textLength="187" x="359.5" y="1736.7676">return global host reservation</text><!--MD5=[31ce4acb5044d12c75fb908f2994650f]
-link bySubnet to return--><path d="M585.84,1693.2092 C578.18,1707.0592 565.99,1726.4892 551.5,1740.1992 C540.25,1750.8392 526.18,1760.1692 513.05,1767.6492 " fill="none" id="bySubnet-&gt;return" style="stroke: #A80036; stroke-width: 1.0;"/><polygon fill="#A80036" points="508.63,1770.1192,518.4378,1769.2206,512.9947,1767.6801,514.5352,1762.2371,508.63,1770.1192" style="stroke: #A80036; stroke-width: 1.0;"/><text fill="#000000" font-family="sans-serif" font-size="13" lengthAdjust="spacingAndGlyphs" textLength="191" x="566.5" y="1736.7676">return subnet host reservation</text><!--MD5=[a6820fb97738092a09d9f170f6e00dae]
+link pool_iterate to inAllowedPool--><path d="M275.5,1273.5392 C275.5,1292.7692 275.5,1323.8292 275.5,1344.8592 " fill="none" id="pool_iterate-&gt;inAllowedPool" style="stroke: #A80036; stroke-width: 1.0;"/><polygon fill="#A80036" points="275.5,1349.9792,279.5,1340.9792,275.5,1344.9792,271.5,1340.9792,275.5,1349.9792" style="stroke: #A80036; stroke-width: 1.0;"/><text fill="#000000" font-family="sans-serif" font-size="13" lengthAdjust="spacingAndGlyphs" textLength="168" x="276.5" y="1316.7676">address in an allowed pool</text><!--MD5=[03b0dcad835fe04723134b797eb9a319]
+link pool_iterate to allocate--><path d="M375.89,1273.2492 C408.78,1280.8692 439.69,1290.9192 450.5,1303.1992 C484.66,1341.9792 481.2,1407.7092 476.46,1441.9492 " fill="none" id="pool_iterate-&gt;allocate" style="stroke: #A80036; stroke-width: 1.0;"/><polygon fill="#A80036" points="475.7,1447.1692,480.9697,1438.8487,476.4291,1442.2227,473.0552,1437.6821,475.7,1447.1692" style="stroke: #A80036; stroke-width: 1.0;"/><text fill="#000000" font-family="sans-serif" font-size="13" lengthAdjust="spacingAndGlyphs" textLength="100" x="479.5" y="1373.2676">no allowed pool</text><!--MD5=[27c03cbbcf5b4bbc0f83ff469240ee91]
+link inAllowedPool to allocate--><path d="M311.18,1386.3992 C345.34,1402.8792 396.82,1427.7092 432.4,1444.8592 " fill="none" id="inAllowedPool-&gt;allocate" style="stroke: #A80036; stroke-width: 1.0;"/><polygon fill="#A80036" points="437.09,1447.1192,430.7227,1439.6054,432.5869,1444.9463,427.246,1446.8104,437.09,1447.1192" style="stroke: #A80036; stroke-width: 1.0;"/><!--MD5=[c7ed7f8e85efd784aa0446a03842ecad]
+link allocate to allocate_iterate--><path d="M393.3,1481.6592 C375.37,1488.5992 357.97,1498.6492 345.5,1513.1992 C335.73,1524.5992 332.59,1541.3292 331.83,1554.8292 " fill="none" id="allocate-&gt;allocate_iterate" style="stroke: #A80036; stroke-width: 1.0;"/><polygon fill="#A80036" points="331.65,1560.0092,335.9813,1551.1639,331.8356,1555.0127,327.9868,1550.867,331.65,1560.0092" style="stroke: #A80036; stroke-width: 1.0;"/><text fill="#000000" font-family="sans-serif" font-size="13" lengthAdjust="spacingAndGlyphs" textLength="240" x="346.5" y="1526.7676">start from preferred (last used) subnet</text><!--MD5=[b4b32474e67014a0ea8b9d2dcb8b921b]
+link allocate to getHRmode--><path d="M551.57,1482.2592 C567.28,1489.1692 581.88,1499.0592 591.5,1513.1992 C647.03,1594.8392 571.65,1717.1292 536.65,1765.9492 " fill="none" id="allocate-&gt;getHRmode" style="stroke: #A80036; stroke-width: 1.0;"/><polygon fill="#A80036" points="533.6,1770.1692,542.1109,1765.2129,536.5264,1766.1151,535.6242,1760.5306,533.6,1770.1692" style="stroke: #A80036; stroke-width: 1.0;"/><text fill="#000000" font-family="sans-serif" font-size="13" lengthAdjust="spacingAndGlyphs" textLength="198" x="605.5" y="1639.7676">allocation is not in all branches</text><!--MD5=[5d722979ddb74375b031e6d5bd55f242]
+link allocate_iterate to allocate_iterate--><path d="M433.25,1568.1192 C453.52,1569.2292 468,1572.5892 468,1578.1992 C468,1583.3192 455.9,1586.5692 438.34,1587.9492 " fill="none" id="allocate_iterate-&gt;allocate_iterate" style="stroke: #A80036; stroke-width: 1.0;"/><polygon fill="#A80036" points="433.25,1588.2792,442.4936,1591.6787,438.2392,1587.9504,441.9675,1583.696,433.25,1588.2792" style="stroke: #A80036; stroke-width: 1.0;"/><text fill="#000000" font-family="sans-serif" font-size="13" lengthAdjust="spacingAndGlyphs" textLength="97" x="474" y="1583.2676">no free address</text><!--MD5=[0a74e69bd975a88dffe2300213585d86]
+link allocate_iterate to allocated--><path d="M343.59,1596.5392 C356.05,1616.0092 376.26,1647.6192 389.72,1668.6592 " fill="none" id="allocate_iterate-&gt;allocated" style="stroke: #A80036; stroke-width: 1.0;"/><polygon fill="#A80036" points="392.48,1672.9792,390.9779,1663.2456,389.7762,1668.7733,384.2485,1667.5716,392.48,1672.9792" style="stroke: #A80036; stroke-width: 1.0;"/><text fill="#000000" font-family="sans-serif" font-size="13" lengthAdjust="spacingAndGlyphs" textLength="129" x="373.5" y="1639.7676">found a free address</text><!--MD5=[1be0f2f74e199399aa4e09476dce36f7]
+link allocated to getHRmode--><path d="M424.69,1709.3992 C444.57,1725.5392 474.31,1749.6992 495.38,1766.7992 " fill="none" id="allocated-&gt;getHRmode" style="stroke: #A80036; stroke-width: 1.0;"/><polygon fill="#A80036" points="499.47,1770.1192,494.9879,1761.3494,495.5824,1766.9749,489.9569,1767.5694,499.47,1770.1192" style="stroke: #A80036; stroke-width: 1.0;"/><!--MD5=[9e14dd0054774aedb71cf602d40d12b7]
+link getHRmode to checkHRmode--><path d="M520.5,1806.6192 C520.5,1822.1592 520.5,1844.9792 520.5,1861.8592 " fill="none" id="getHRmode-&gt;checkHRmode" style="stroke: #A80036; stroke-width: 1.0;"/><polygon fill="#A80036" points="520.5,1866.8892,524.5,1857.8892,520.5,1861.8892,516.5,1857.8892,520.5,1866.8892" style="stroke: #A80036; stroke-width: 1.0;"/><!--MD5=[a84b25cfb30efcca4b707749deb6e97a]
+link checkHRmode to global--><path d="M502.01,1903.2992 C480.76,1922.9592 445.87,1955.2292 423.04,1976.3492 " fill="none" id="checkHRmode-&gt;global" style="stroke: #A80036; stroke-width: 1.0;"/><polygon fill="#A80036" points="419.21,1979.8992,428.5379,1976.7384,422.8857,1976.5096,423.1145,1970.8574,419.21,1979.8992" style="stroke: #A80036; stroke-width: 1.0;"/><text fill="#000000" font-family="sans-serif" font-size="13" lengthAdjust="spacingAndGlyphs" textLength="21" x="468.5" y="1946.7676">yes</text><!--MD5=[a6bc61640de244f08df3cca17a4f2365]
+link checkHRmode to bySubnet--><path d="M539.3,1903.2992 C560.9,1922.9592 596.37,1955.2292 619.58,1976.3492 " fill="none" id="checkHRmode-&gt;bySubnet" style="stroke: #A80036; stroke-width: 1.0;"/><polygon fill="#A80036" points="623.48,1979.8992,619.5026,1970.8892,619.7771,1976.5394,614.1269,1976.8139,623.48,1979.8992" style="stroke: #A80036; stroke-width: 1.0;"/><text fill="#000000" font-family="sans-serif" font-size="13" lengthAdjust="spacingAndGlyphs" textLength="16" x="589.5" y="1946.7676">no</text><!--MD5=[b516e9f33f07fd0923019528919312cb]
+link global to return--><path d="M397.59,2016.3892 C396.2,2030.3392 396.61,2049.8292 406.5,2063.1992 C415.42,2075.2592 428,2084.2392 441.56,2090.9292 " fill="none" id="global-&gt;return" style="stroke: #A80036; stroke-width: 1.0;"/><polygon fill="#A80036" points="446.2,2093.1092,439.7564,2085.6607,441.6749,2090.9823,436.3533,2092.9008,446.2,2093.1092" style="stroke: #A80036; stroke-width: 1.0;"/><text fill="#000000" font-family="sans-serif" font-size="13" lengthAdjust="spacingAndGlyphs" textLength="187" x="407.5" y="2059.7676">return global host reservation</text><!--MD5=[31ce4acb5044d12c75fb908f2994650f]
+link bySubnet to return--><path d="M633.84,2016.2092 C626.18,2030.0592 613.99,2049.4892 599.5,2063.1992 C588.25,2073.8392 574.18,2083.1692 561.05,2090.6492 " fill="none" id="bySubnet-&gt;return" style="stroke: #A80036; stroke-width: 1.0;"/><polygon fill="#A80036" points="556.63,2093.1192,566.4378,2092.2206,560.9947,2090.6801,562.5352,2085.2371,556.63,2093.1192" style="stroke: #A80036; stroke-width: 1.0;"/><text fill="#000000" font-family="sans-serif" font-size="13" lengthAdjust="spacingAndGlyphs" textLength="191" x="614.5" y="2059.7676">return subnet host reservation</text><text fill="#888888" font-family="sans-serif" font-size="10" lengthAdjust="spacingAndGlyphs" textLength="622" x="164.75" y="2150.3555">Only the initial lookup is always performed: other occasions to change the subnet so the current host are only in some branches</text><!--MD5=[03f36504efefc9c8f8f86dce605a3c11]
 @startuml
 
 title currentHost DHCPv4 (Kea 1.7.11)
@@ -75,6 +83,12 @@ agent "Iterate on allowed subnets with pool" as pool_iterate
 
 agent "Set subnet to address pool subnet" as inAllowedPool
 
+agent "Allocate a new lease" as allocate
+
+agent "Iterate on allowed subnets" as allocate_iterate
+
+agent "Set subnet to allocated lease subnet" as allocated
+
 agent "Get subnet host reservation mode" as getHRmode
 
 agent "Is subnet host reservation mode global?" as checkHRmode
@@ -100,20 +114,27 @@ hwaddr_iterate - -> found_hwaddr : found a lease
 found_hwaddr - - - -> hasAddressReservation
 hwaddr_iterate - -> hasAddressReservation : not found
 hasAddressReservation - -> setAddressReservation : yes
-hasAddressReservation - -> pool : no
+hasAddressReservation - -> pool : no or not check in the taken branch
 setAddressReservation - -> pool
 pool - -> pool_iterate
-pool - - -> getHRmode : pool check is not in all branches
+pool - - -> allocate : pool check is not in all branches
 pool_iterate -> pool_iterate : address not in an allowed pool
 pool_iterate - -> inAllowedPool : address in an allowed pool
-pool_iterate - - -> getHRmode : no allowed pool
-inAllowedPool - -> getHRmode
+pool_iterate - - -> allocate : no allowed pool
+inAllowedPool - -> allocate
+allocate - -> allocate_iterate : start from preferred (last used) subnet
+allocate - - -> getHRmode : allocation is not in all branches
+allocate_iterate -> allocate_iterate : no free address
+allocate_iterate - -> allocated : found a free address
+allocated - -> getHRmode
 getHRmode - -> checkHRmode
 checkHRmode - -> global : yes
 checkHRmode - -> bySubnet : no
 global - -> return : return global host reservation
 bySubnet - -> return : return subnet host reservation
 
+footer Only the initial lookup is always performed: other occasions to change the subnet so the current host are only in some branches
+
 @enduml
 
 PlantUML version 1.2020.15(Sun Jun 28 13:39:45 CEST 2020)
diff --git a/doc/devel/images/currentHost4.uml b/doc/devel/images/currentHost4.uml
index 68c2dd06cf..c61eb6cd32 100644
--- a/doc/devel/images/currentHost4.uml
+++ b/doc/devel/images/currentHost4.uml
@@ -28,6 +28,12 @@ agent "Iterate on allowed subnets with pool" as pool_iterate
 
 agent "Set subnet to address pool subnet" as inAllowedPool
 
+agent "Allocate a new lease" as allocate
+
+agent "Iterate on allowed subnets" as allocate_iterate
+
+agent "Set subnet to allocated lease subnet" as allocated
+
 agent "Get subnet host reservation mode" as getHRmode
 
 agent "Is subnet host reservation mode global?" as checkHRmode
@@ -53,18 +59,25 @@ hwaddr_iterate --> found_hwaddr : found a lease
 found_hwaddr ----> hasAddressReservation
 hwaddr_iterate --> hasAddressReservation : not found
 hasAddressReservation --> setAddressReservation : yes
-hasAddressReservation --> pool : no
+hasAddressReservation --> pool : no or not check in the taken branch
 setAddressReservation --> pool
 pool --> pool_iterate
-pool ---> getHRmode : pool check is not in all branches
+pool ---> allocate : pool check is not in all branches
 pool_iterate -> pool_iterate : address not in an allowed pool
 pool_iterate --> inAllowedPool : address in an allowed pool
-pool_iterate ---> getHRmode : no allowed pool
-inAllowedPool --> getHRmode
+pool_iterate ---> allocate : no allowed pool
+inAllowedPool --> allocate
+allocate --> allocate_iterate : start from preferred (last used) subnet
+allocate ---> getHRmode : allocation is not in all branches
+allocate_iterate -> allocate_iterate : no free address
+allocate_iterate --> allocated : found a free address
+allocated --> getHRmode
 getHRmode --> checkHRmode
 checkHRmode --> global : yes
 checkHRmode --> bySubnet : no
 global --> return : return global host reservation
 bySubnet --> return : return subnet host reservation
 
+footer Only the initial lookup is always performed: other occasions to change the subnet so the current host are only in some branches
+
 @enduml
\ No newline at end of file