diff --git a/plugins/dynamix.docker.manager/DockerSettings.page b/plugins/dynamix.docker.manager/DockerSettings.page
index e617006d4..cd5737de2 100644
--- a/plugins/dynamix.docker.manager/DockerSettings.page
+++ b/plugins/dynamix.docker.manager/DockerSettings.page
@@ -7,7 +7,7 @@ Tag="docker"
 /* Copyright 2005-2017, Lime Technology
  * Copyright 2014-2017, Guilherme Jardim, Eric Schultz, Jon Panozzo.
  *
- * Additional updates by Bergware International (July 2017)
+ * Additional updates by Bergware International (October 2017)
  *
  * This program is free software; you can redistribute it and/or
  * modify it under the terms of the GNU General Public License version 2,
@@ -56,18 +56,41 @@ foreach ($custom as $network) {
   if ($route = exec("ip -4 route show dev $network|grep -Po '^[12]\S+'")) $include[$network] = $route;
   if ($route6 = exec("ip -6 route show dev $network|grep -Po '^[1-9]\S+'")) $include6[$network] = $route6;
 }
+function base_min($route) {
+  list($net,$mask) = explode('/',$route);
+  $mask = 32-$mask;
+  return explode('.',long2ip((ip2long($net)>>$mask)<<$mask));
+}
+function base_max($route) {
+  list($net,$mask) = explode('/',$route);
+  $mask = 32-$mask;
+  return explode('.',long2ip(((ip2long($net)>>$mask)<<$mask)+pow(2,$mask)-1));
+}
+function base_net($route) {
+  return substr(explode('/',$route)[0],0,-2);
+}
 ?>
 <link type="text/css" rel="stylesheet" href="/webGui/styles/jquery.filetree.css">
 <link type="text/css" rel="stylesheet" href="/webGui/styles/jquery.switchbutton.css">
 <style>
-  .errortext{color:#EF3D47;display:none;}
-  .fileTree{width:305px;max-height:150px;overflow:scroll;position:absolute;z-index:100;display:none;}
-  .basic{display: block;}
-  .advanced{display:none;white-space: nowrap;}
+.errortext{color:#EF3D47;display:none}
+.fileTree{width:305px;max-height:150px;overflow:scroll;position:absolute;z-index:100;display:none}
+.basic{display:block}
+.advanced{display:none;white-space:nowrap}
+select.mask{min-width:0;margin:0 10px 0 4px}
+select.net{min-width:0;margin:0 4px 0 0}
+select option.hide{display:none}
+input.net{width:146px;margin:0 4px 0 0}
+span.net{margin-right:8px}
+<?if (strstr('white,azure',$display['theme'])):?>
+span.disabled{color:#B0B0B0}
+<?else:?>
+span.disabled{color:#404040}
+<?endif;?>
 </style>
-<span class="status"><input type="checkbox" class="advancedview"></span>
+<span class="status" style="margin-top:<?=strstr('gray,azure',$display['theme'])?0:-10?>px;"><input type="checkbox" class="advancedview"></span>
 
-<form markdown="1" id="settingsForm" name="settingsForm" method="POST" action="/update.php" target="progressFrame">
+<form markdown="1" id="settingsForm" name="settingsForm" method="POST" action="/update.php" target="progressFrame" onsubmit="prepareDocker(this)">
 <input type="hidden" name="#file" value="<?=$docker_cfgfile?>">
 <input type="hidden" name="#command" value="/plugins/dynamix/scripts/emhttpd_update">
 Enable Docker:
@@ -197,10 +220,43 @@ Template Authoring Mode:
 
 <?if ($DockerStopped):?>
 DHCPv4 pool of custom network <?=$network?> (optional):
-: <input type="text" name="<?=$docker_dhcp?>" value="<?=$dockercfg[$docker_dhcp]?>" class="narrow">Subnet: <span id="<?=$docker_dhcp?>"><?=$route?></span>
+<?
+  $dhcp = $dockercfg[$docker_dhcp] ?? false;
+  $disabled = $dhcp ? '':'disabled';
+  $net = base_min($route);
+  $max = base_max($route);
+  $mask = explode('/',$route)[1];
+  $net_user = $dhcp ? base_min($dhcp) : $net;
+  $mask_user = $dhcp ? explode('/',$dhcp)[1] : $mask;
+  $size = pow(2,32-$mask_user);
+  switch (true) {
+    case ($mask < 16): $prefix = $net[0]; $box = 1; break;
+    case ($mask < 24): $prefix = $net[0].'.'.$net[1]; $box = 2; break;
+    case ($mask < 32): $prefix = $net[0].'.'.$net[1].'.'.$net[2]; $box = 3 ;break;
+  }
+?>
+: <input type="checkbox" id="<?=$docker_dhcp?>_edit" onchange="changeEdit(this.id)"<?=$dhcp?'checked':''?>>
+  <span id="<?=$docker_dhcp?>_net" class="net <?=$disabled?>"><?=$prefix?>.</span><?
+  for ($b=$box; $b<=3; $b++) {
+    switch ($b) {
+      case 1: $step = $size/65536%256; break;
+      case 2: $step = $size/256%256; break;
+      case 3: $step = $size%256; break;
+    }
+    if ($step===0) $step = 256;
+    echo "<select id=\"{$docker_dhcp}_{$b}\" class=\"net\" $disabled>";
+    for ($n=$net[$b]; $n<=$max[$b]; $n++) echo mk_option($net_user[$b],$n,$n,$n%$step==0?'':'class="hide"');
+    echo "</select>";
+  }
+  echo "/";
+  echo "<select id=\"{$docker_dhcp}_mask\" class=\"mask\" onchange=\"changeMask(this.id)\" $disabled>";
+  for ($m=$mask; $m<=30; $m++) echo mk_option($mask_user,$m,$m);
+  echo "</select><span id=\"{$docker_dhcp}_size\" style=\"".($dhcp?'':'display:none')."\">($size hosts)</span>";
+  echo "<input type=\"hidden\" name=\"$docker_dhcp\" value=\"\">";
+?>
 <?elseif ($dockercfg[$docker_dhcp]):?>
 DHCPv4 pool of custom network <?=$network?>:
-: <?=$dockercfg[$docker_dhcp]?>
+: <?=$dockercfg[$docker_dhcp]?>&nbsp;&nbsp;(<?=pow(2,32-explode('/',$dockercfg[$docker_dhcp])[1])?> hosts)
 <?endif;?>
 
 <?endforeach;?>
@@ -211,7 +267,21 @@ DHCPv4 pool of custom network <?=$network?>:
 
 <?if ($DockerStopped):?>
 DHCPv6 pool of custom network <?=$network?> (optional):
-: <input type="text" name="<?=$docker_dhcp6?>" value="<?=$dockercfg[$docker_dhcp6]?>" class="narrow">Subnet: <span id="<?=$docker_dhcp6?>"><?=$route?></span>
+<?
+  $dhcp = $dockercfg[$docker_dhcp6] ?? false;
+  $disabled = $dhcp ? '':'disabled';
+  $net = base_net($route);
+  $mask = explode('/',$route)[1];
+  $net_user = $dhcp ? str_replace("$net:","",base_net($dhcp)) : '';
+  $mask_user = $dhcp ? explode('/',$dhcp)[1] : $mask;
+?>
+: <input type="checkbox" id="<?=$docker_dhcp6?>_edit" onchange="changeEdit6(this.id)"<?=$dhcp?'checked':''?>>
+  <span id="<?=$docker_dhcp6?>_net" class="net <?=$disabled?>"><?=$net?>:</span><?
+  echo "<input type=\"text\" id=\"{$docker_dhcp6}_text\" value=\"$net_user\" class=\"net\" $disabled>/";
+  echo "<select id=\"{$docker_dhcp6}_mask\" class=\"mask\" $disabled>";
+  for ($m=$mask; $m<=120; $m+=8) echo mk_option($mask_user,$m,$m);
+  echo "</select><input type=\"hidden\" name=\"$docker_dhcp6\" value=\"\">";
+?>
 <?elseif ($dockercfg[$docker_dhcp6]):?>
 DHCPv6 pool of custom network <?=$network?>:
 : <?=$dockercfg[$docker_dhcp6]?>
@@ -268,6 +338,67 @@ btrfs scrub status:
 <script src="/webGui/javascript/jquery.filetree.js"></script>
 <script src="/webGui/javascript/jquery.switchbutton.js"></script>
 <script>
+function prepareDocker(form) {
+  $(form).find('input:hidden[name^="DOCKER_DHCP_"]').each(function(){
+    var id = '#'+$(this).attr('name')+'_';
+    if ($(id+'edit').prop('checked')) {
+      var net = $(id+'net').text();
+      for (var b=1; b<=3; b++) if ($(id+b).length>0) net += $(id+b).val()+'.';
+      net = net.replace(/\.$/,'/')+$(id+'mask').val();
+      $(this).val(net);
+    }
+  });
+  $(form).find('input:hidden[name^="DOCKER_DHCP6_"]').each(function(){
+    var id = '#'+$(this).attr('name')+'_';
+    if ($(id+'edit').prop('checked')) {
+      var net = $(id+'net').text()+$(id+'text').val();
+      if (net.substr(-2)!='::') net += '::';
+      $(this).val(net+'/'+$(id+'mask').val());
+    }
+  });
+}
+function changeEdit(id) {
+  var checked = $('#'+id).prop('checked');
+  id = '#'+id.substr(0,id.length-4);
+  for (var b=1; b<=3; b++) if ($(id+b).length>0) $(id+b).prop('disabled',!checked);
+  $(id+'mask').prop('disabled',!checked);
+  if (checked) {
+    $(id+'size').show();
+    $(id+'net').removeClass('disabled');
+  } else {
+    $(id+'size').hide();
+    $(id+'net').addClass('disabled','disabled');
+  }
+}
+function changeEdit6(id) {
+  var checked = $('#'+id).prop('checked');
+  id = '#'+id.substr(0,id.length-4);
+  $(id+'text').prop('disabled',!checked);
+  $(id+'mask').prop('disabled',!checked);
+  if (checked) {
+    $(id+'net').removeClass('disabled');
+  } else {
+    $(id+'net').addClass('disabled','disabled');
+  }
+}
+function changeMask(id) {
+  var mask = Math.pow(2,32-$('#'+id).val());
+  id = '#'+id.substr(0,id.length-4);
+  $(id+'size').html('('+mask+' hosts)');
+  for (var b=1; b<=3; b++) {
+    var cell = id+b;
+    switch (b) {
+      case 1: var step = mask/65536%256; break;
+      case 2: var step = mask/256%256; break;
+      case 3: var step = mask%256; break;
+    }
+    if (step==0) step = 256;
+    if ($(cell).length==0) continue;
+    var max = $(cell+' option').size();
+    for (var i=0; i < max; i++) if (i%step==0) $(cell+' option:eq('+i+')').removeClass('hide'); else $(cell+' option:eq('+i+')').addClass('hide');
+    if ($(cell+' option:selected').val()%step!=0) $(cell+' option:selected').removeAttr('selected');
+  }
+}
 function ip2int(ip) {
   return ip.split('.').reduce(function(ipInt,octet){return (ipInt<<8)+parseInt(octet,10)},0)>>>0;
 }
@@ -284,8 +415,8 @@ function checkDHCPv4() {
       if (typeof(base[1])=='undefined') base[1] = 32;
       var toppool = ip2int(pool[0]);
       var topbase = ip2int(base[0]);
-      var endpool = toppool+2**(32-pool[1]);
-      var endbase = topbase+2**(32-base[1]);
+      var endpool = toppool+Math.pow(2,32-pool[1]);
+      var endbase = topbase+Math.pow(2,32-base[1]);
       if (good && (toppool < topbase || endpool > endbase)) {good = false; swal('Invalid pool address','Pool address is out of range','error');}
     }
   });
@@ -331,7 +462,7 @@ $(function() {
       var image = $("#DOCKER_IMAGE_FILE").val();
 
       target = $("#IMAGE_ERROR");
-      $.getJSON( "/plugins/dynamix.docker.manager/include/UpdateConfig.php?is_dir=" + image).done(function( json ) {
+      $.getJSON( "/plugins/dynamix.docker.manager/include/UpdateConfig.php?is_dir=" + image).done(function(json) {
         if (json.is_dir === true){
           target.fadeIn().html('Error: must be a file; directory provided.');
           isError = true;
@@ -401,7 +532,7 @@ $(function() {
   $('.advancedview').change(function () {
     $('.advanced').toggle('slow');
     $('.basic').toggle('slow');
-    $.cookie('dockersettings_view_mode', $('.advancedview').is(':checked') ? 'advanced' : 'basic', { expires: 3650 });
+    $.cookie('dockersettings_view_mode', $('.advancedview').is(':checked') ? 'advanced':'basic', {expires:3650});
   });
 
   showStatus('pid','dockerd');
diff --git a/plugins/dynamix/Eth0.page b/plugins/dynamix/Eth0.page
index eae64d0a4..00022ab73 100644
--- a/plugins/dynamix/Eth0.page
+++ b/plugins/dynamix/Eth0.page
@@ -70,13 +70,15 @@ $vlan_eth0 = [0];
 if (isset($eth0)) foreach ($eth0 as $key => $val) if (strpos($key,$vlan_id)===0) $vlan_eth0[] = substr($key,strlen($vlan_id));
 ?>
 <style>
-span.pin i{font-size:16px;cursor:pointer;}
-span.red{color:#E68A00;}
-span.blue{color:#00529B;}
-span.green{color:#4F8A10;}
+span.pin i{font-size:16px;cursor:pointer}
+span.red{color:#E68A00}
+span.blue{color:#00529B}
+span.green{color:#4F8A10}
 input.gap{margin-right:10px}
-div.shade-white{background-color:#F8F8F8;}
-div.shade-black{background-color:#0C0C0C;}
+div.shade-white{background-color:#F8F8F8}
+div.shade-black{background-color:#0C0C0C}
+select.slim{min-width:45px}
+input.slim{width:32px}
 </style>
 <script>
 <?if ($build):?>
@@ -217,24 +219,15 @@ function checkNetworkSettings(form,index,open) {
   var protocol = $(form).find('select[name="PROTOCOL:'+index+'"]').val() || 'ipv4';
   if (protocol != 'ipv6') {
     $(form).find('input[name="IPADDR:'+index+'"]').prop('disabled',disabled).prop('required',!disabled);
-    var netmask = $(form).find('select[name="NETMASK:'+index+'"]');
-    var gateway = $(form).find('input[name="GATEWAY:'+index+'"]');
-    netmask.prop('disabled',disabled);
-    gateway.prop('disabled',disabled);
-    if (!disabled) {
-      var none = netmask.find('option[value="none"]');
-      if (none.length) {netmask.val('255.255.255.0'); none.remove();}
-    }
+    $(form).find('select[name="NETMASK:'+index+'"]').prop('disabled',disabled);
+    $(form).find('input[name="GATEWAY:'+index+'"]').prop('disabled',disabled);
   }
   if (protocol != 'ipv4') {
     $(form).find('input[name="IPADDR6:'+index+'"]').prop('disabled',disabled).prop('required',!disabled);
-    var netmask6 = $(form).find('input[name="NETMASK6:'+index+'"]');
-    var gateway6 = $(form).find('input[name="GATEWAY6:'+index+'"]');
-    var privacy6 = $(form).find('select[name="PRIVACY6:'+index+'"]');
-    netmask6.prop('disabled',disabled).prop('required',!disabled);
-    gateway6.prop('disabled',disabled);
-    privacy6.prop('disabled',!disabled);
-    if (!open) privacy6.val(disabled ? 0 : 2);
+    $(form).find('input[name="NETMASK6:'+index+'"]').prop('disabled',disabled).prop('required',!disabled);
+    $(form).find('input[name="GATEWAY6:'+index+'"]').prop('disabled',disabled);
+    var privacy = $(form).find('select[name="PRIVACY6:'+index+'"]');
+    privacy.prop('disabled',!disabled); if (!open) privacy.val(disabled ? 0 : 2);
   }
   if (dns && index==0) {
     if (!open) form.DHCP_KEEPRESOLV.value = disabled ? 'no' : 'yes';
@@ -311,9 +304,9 @@ function removeVLAN(element,disabled) {
   $(element).remove();
   $('#index-'+id[1]+'-0').find('select').first().trigger('change');
 }
-function disableForm(form,member) {
+function disableForm(form) {
   $(form).find('input,select').not('input[value="Done"]').prop('disabled',true);
-  if (member) $(form).find('input[name^="DESCRIPTION"],input[name^="#"]').prop('disabled',false);
+  $(form).find('input[name^="DESCRIPTION"],input[name^="#"]').prop('disabled',false);
 }
 var stopEvent = false;
 function exitCode(form,key) {
@@ -472,44 +465,34 @@ IP address assignment:
 
 <div class="eth0-ipv4-<?=$i?>" style="display:none" markdown="1">
 IPv4 address:
-: <input type="text" name="IPADDR:<?=$i?>" maxlength="15" value="<?=$eth0["IPADDR:$i"]?>" class="narrow" pattern="<?=$validIP4?>" title="IPv4 address A.B.C.D">
-
-> Greyed out when using automatic IP assignment. Otherwise specify here the IPv4 address of the system.
-
-IPv4 network mask:
-: <select name="NETMASK:<?=$i?>" size="1">
-  <?=mk_option($eth0["NETMASK:$i"], "255.255.0.0", "255.255.0.0");?>
-  <?=mk_option($eth0["NETMASK:$i"], "255.255.252.0", "255.255.252.0");?>
-  <?=mk_option($eth0["NETMASK:$i"], "255.255.254.0", "255.255.254.0");?>
-  <?=mk_option($eth0["NETMASK:$i"], "255.255.255.0", "255.255.255.0");?>
-  <?=mk_option($eth0["NETMASK:$i"], "255.255.255.128", "255.255.255.128");?>
-  <?=mk_option($eth0["NETMASK:$i"], "255.255.255.192", "255.255.255.192");?>
-  <?=mk_option($eth0["NETMASK:$i"], "255.255.255.224", "255.255.255.224");?>
-  <?=mk_option($eth0["NETMASK:$i"], "255.255.255.240", "255.255.255.240");?>
-  <?=mk_option($eth0["NETMASK:$i"], "255.255.255.248", "255.255.255.248");?>
-  <?=mk_option($eth0["NETMASK:$i"], "255.255.255.252", "255.255.255.252");?>
+: <input type="text" name="IPADDR:<?=$i?>" maxlength="15" value="<?=$eth0["IPADDR:$i"]?>" class="narrow" pattern="<?=$validIP4?>" title="IPv4 address A.B.C.D">/ <select name="NETMASK:<?=$i?>" size="1" class="slim">
+  <?=mk_option($eth0["NETMASK:$i"], "255.255.0.0", "16");?>
+  <?=mk_option($eth0["NETMASK:$i"], "255.255.252.0", "22");?>
+  <?=mk_option($eth0["NETMASK:$i"], "255.255.254.0", "23");?>
+  <?=mk_option($eth0["NETMASK:$i"], "255.255.255.0", "24", $eth0["IPADDR:$i"]?"":"selected");?>
+  <?=mk_option($eth0["NETMASK:$i"], "255.255.255.128", "25");?>
+  <?=mk_option($eth0["NETMASK:$i"], "255.255.255.192", "26");?>
+  <?=mk_option($eth0["NETMASK:$i"], "255.255.255.224", "27");?>
+  <?=mk_option($eth0["NETMASK:$i"], "255.255.255.240", "28");?>
+  <?=mk_option($eth0["NETMASK:$i"], "255.255.255.248", "29");?>
+  <?=mk_option($eth0["NETMASK:$i"], "255.255.255.252", "30");?>
   </select>
 
-> Greyed out when using automatic IP assignment. Otherwise specify here the associated network mask, by default 255.255.255.0 is selected.
+> Greyed out when using automatic IP assignment. Otherwise specify here the IPv4 address and mask of the system.
 
 IPv4 default gateway:
 : <input type="text" name="GATEWAY:<?=$i?>" maxlength="15" value="<?=$eth0["GATEWAY:$i"]?>" class="narrow" pattern="<?=$validIP4?>" title="IPv4 address A.B.C.D">
-  <input type="text" name="METRIC:<?=$i?>" min="1" max="9999" value="<?=$eth0["METRIC:$i"]?>" class="trim"><i class="fa fa-sort-numeric-asc"></i> <em>optional metric (lowest is preferred)</em>
+  <input type="text" name="METRIC:<?=$i?>" min="1" max="9999" value="<?=$eth0["METRIC:$i"]?>" class="slim"><i class="fa fa-sort-numeric-asc"></i> <em>optional metric (lowest is preferred)</em>
 
 > Greyed out when using automatic IP assignment. Otherwise specify here the IPv4 address of your router.
 
 </div>
 <div class="eth0-ipv6-<?=$i?>" style="display:none" markdown="1">
 IPv6 address:
-: <input type="text" name="IPADDR6:<?=$i?>" maxlength="39" value="<?=$eth0["IPADDR6:$i"]?>" pattern="<?=$validIP6?>" title="IPv6 address nnnn:xxxx::yyyy">
+: <input type="text" name="IPADDR6:<?=$i?>" maxlength="39" value="<?=$eth0["IPADDR6:$i"]?>" pattern="<?=$validIP6?>" title="IPv6 address nnnn:xxxx::yyyy">/ <input type="number" name="NETMASK6:<?=$i?>" min="1" max="128" value="<?=$eth0["NETMASK6:$i"]?>" class="slim">
 
 > Greyed out when using automatic IP assignment. Otherwise specify here the IPv6 address of the system.
 
-IPv6 prefix:
-: <input type="number" name="NETMASK6:<?=$i?>" min="1" max="128" value="<?=$eth0["NETMASK6:$i"]?>" class="trim">
-
-> Greyed out when using automatic IP assignment. Otherwise specify here the associated prefix value of 1 to 128.
-
 IPv6 default gateway:
 : <input type="text" name="GATEWAY6:<?=$i?>" maxlength="39" value="<?=$eth0["GATEWAY6:$i"]?>" pattern="<?=$validIP6?>" title="IPv6 address nnnn:xxxx::yyyy">
 
@@ -628,43 +611,33 @@ IP address assignment:
 
 <div class="eth0-ipv4-<?=$i?>" style="display:none" markdown="1">
 IPv4 address:
-: <input type="text" name="IPADDR:<?=$i?>" maxlength="15" value="<?=$eth0["IPADDR:$i"]?>" class="narrow" pattern="<?=$validIP4?>" title="IPv4 address A.B.C.D">
-
-> Greyed out when using automatic IP assignment. Otherwise specify here the IPv4 address of the system.
-
-IPv4 network mask:
-: <select name="NETMASK:<?=$i?>" size="1">
-  <?=mk_option($eth0["NETMASK:$i"], "255.255.0.0", "255.255.0.0");?>
-  <?=mk_option($eth0["NETMASK:$i"], "255.255.252.0", "255.255.252.0");?>
-  <?=mk_option($eth0["NETMASK:$i"], "255.255.254.0", "255.255.254.0");?>
-  <?=mk_option($eth0["NETMASK:$i"], "255.255.255.0", "255.255.255.0");?>
-  <?=mk_option($eth0["NETMASK:$i"], "255.255.255.128", "255.255.255.128");?>
-  <?=mk_option($eth0["NETMASK:$i"], "255.255.255.192", "255.255.255.192");?>
-  <?=mk_option($eth0["NETMASK:$i"], "255.255.255.224", "255.255.255.224");?>
-  <?=mk_option($eth0["NETMASK:$i"], "255.255.255.240", "255.255.255.240");?>
-  <?=mk_option($eth0["NETMASK:$i"], "255.255.255.248", "255.255.255.248");?>
-  <?=mk_option($eth0["NETMASK:$i"], "255.255.255.252", "255.255.255.252");?>
+: <input type="text" name="IPADDR:<?=$i?>" maxlength="15" value="<?=$eth0["IPADDR:$i"]?>" class="narrow" pattern="<?=$validIP4?>" title="IPv4 address A.B.C.D">/ <select name="NETMASK:<?=$i?>" size="1" class="slim">
+  <?=mk_option($eth0["NETMASK:$i"], "255.255.0.0", "16");?>
+  <?=mk_option($eth0["NETMASK:$i"], "255.255.252.0", "22");?>
+  <?=mk_option($eth0["NETMASK:$i"], "255.255.254.0", "23");?>
+  <?=mk_option($eth0["NETMASK:$i"], "255.255.255.0", "24", $eth0["IPADDR:$i"]?"":"selected");?>
+  <?=mk_option($eth0["NETMASK:$i"], "255.255.255.128", "25");?>
+  <?=mk_option($eth0["NETMASK:$i"], "255.255.255.192", "26");?>
+  <?=mk_option($eth0["NETMASK:$i"], "255.255.255.224", "27");?>
+  <?=mk_option($eth0["NETMASK:$i"], "255.255.255.240", "28");?>
+  <?=mk_option($eth0["NETMASK:$i"], "255.255.255.248", "29");?>
+  <?=mk_option($eth0["NETMASK:$i"], "255.255.255.252", "30");?>
   </select>
 
-> Greyed out when using automatic IP assignment. Otherwise specify here the associated network mask, by default 255.255.255.0 is selected.
+> Greyed out when using automatic IP assignment. Otherwise specify here the IPv4 address and mask of the system.
 
 IPv4 default gateway:
 : <input type="text" name="GATEWAY:<?=$i?>" maxlength="15" value="<?=$eth0["GATEWAY:$i"]?>" class="narrow" pattern="<?=$validIP4?>" title="IPv4 address A.B.C.D">
-  <input type="text" name="METRIC:<?=$i?>" min="1" max="9999" value="<?=$eth0["METRIC:$i"]?>" class="trim"><i class="fa fa-sort-numeric-asc"></i> <em>optional metric (lowest is preferred)</em>
+  <input type="text" name="METRIC:<?=$i?>" min="1" max="9999" value="<?=$eth0["METRIC:$i"]?>" class="slim"><i class="fa fa-sort-numeric-asc"></i> <em>optional metric (lowest is preferred)</em>
 
 > Greyed out when using automatic IP assignment. Otherwise specify here the IPv4 address of your router.
 
 </div>
 <div class="eth0-ipv6-<?=$i?>" style="display:none" markdown="1">
 IPv6 address:
-: <input type="text" name="IPADDR6:<?=$i?>" maxlength="39" value="<?=$eth0["IPADDR6:$i"]?>" pattern="<?=$validIP6?>" title="IPv6 address nnnn:xxxx::yyyy">
+: <input type="text" name="IPADDR6:<?=$i?>" maxlength="39" value="<?=$eth0["IPADDR6:$i"]?>" pattern="<?=$validIP6?>" title="IPv6 address nnnn:xxxx::yyyy">/ <input type="number" name="NETMASK6:<?=$i?>" min="1" max="128" value="<?=$eth0["NETMASK6:$i"]?>" class="slim">
 
-> Greyed out when using automatic IP assignment. Otherwise specify here the IPv6 address of the system.
-
-IPv6 prefix:
-: <input type="number" name="NETMASK6:<?=$i?>" min="1" max="128" value="<?=$eth0["NETMASK6:$i"]?>" class="trim">
-
-> Greyed out when using automatic IP assignment. Otherwise specify here the associated prefix value of 1 to 128.
+> Greyed out when using automatic IP assignment. Otherwise specify here the IPv6 address and prefix of the system.
 
 IPv6 default gateway:
 : <input type="text" name="GATEWAY6:<?=$i?>" maxlength="39" value="<?=$eth0["GATEWAY6:$i"]?>" pattern="<?=$validIP6?>" title="IPv6 address nnnn:xxxx::yyyy">
@@ -720,43 +693,33 @@ IP address assignment:
 
 <div class="eth0-ipv4-INDEX" style="display:none" markdown="1">
 IPv4 address:
-: <input type="text" name="IPADDR:INDEX" maxlength="15" value="<?=$eth0["IPADDR:INDEX"]?>" class="narrow" pattern="<?=$validIP4?>" title="IPv4 address A.B.C.D">
-
-> Greyed out when using automatic IP assignment or NONE assignment. Otherwise specify here the IPv4 address of the system.
-
-IPv4 network mask:
-: <select name="NETMASK:INDEX" size="1">
-  <?=mk_option($eth0["NETMASK:INDEX"], "255.255.0.0", "255.255.0.0");?>
-  <?=mk_option($eth0["NETMASK:INDEX"], "255.255.252.0", "255.255.252.0");?>
-  <?=mk_option($eth0["NETMASK:INDEX"], "255.255.254.0", "255.255.254.0");?>
-  <?=mk_option($eth0["NETMASK:INDEX"], "255.255.255.0", "255.255.255.0");?>
-  <?=mk_option($eth0["NETMASK:INDEX"], "255.255.255.128", "255.255.255.128");?>
-  <?=mk_option($eth0["NETMASK:INDEX"], "255.255.255.192", "255.255.255.192");?>
-  <?=mk_option($eth0["NETMASK:INDEX"], "255.255.255.224", "255.255.255.224");?>
-  <?=mk_option($eth0["NETMASK:INDEX"], "255.255.255.240", "255.255.255.240");?>
-  <?=mk_option($eth0["NETMASK:INDEX"], "255.255.255.248", "255.255.255.248");?>
-  <?=mk_option($eth0["NETMASK:INDEX"], "255.255.255.252", "255.255.255.252");?>
+: <input type="text" name="IPADDR:INDEX" maxlength="15" value="<?=$eth0["IPADDR:INDEX"]?>" class="narrow" pattern="<?=$validIP4?>" title="IPv4 address A.B.C.D">/ <select name="NETMASK:INDEX" size="1" class="slim">
+  <?=mk_option($eth0["NETMASK:INDEX"], "255.255.0.0", "16");?>
+  <?=mk_option($eth0["NETMASK:INDEX"], "255.255.252.0", "22");?>
+  <?=mk_option($eth0["NETMASK:INDEX"], "255.255.254.0", "23");?>
+  <?=mk_option($eth0["NETMASK:INDEX"], "255.255.255.0", "24", "selected");?>
+  <?=mk_option($eth0["NETMASK:INDEX"], "255.255.255.128", "25");?>
+  <?=mk_option($eth0["NETMASK:INDEX"], "255.255.255.192", "26");?>
+  <?=mk_option($eth0["NETMASK:INDEX"], "255.255.255.224", "27");?>
+  <?=mk_option($eth0["NETMASK:INDEX"], "255.255.255.240", "28");?>
+  <?=mk_option($eth0["NETMASK:INDEX"], "255.255.255.248", "29");?>
+  <?=mk_option($eth0["NETMASK:INDEX"], "255.255.255.252", "30");?>
   </select>
 
-> Greyed out when using automatic IP assignment or NONE assignment. Otherwise specify here the associated network mask, by default 255.255.255.0 is selected.
+> Greyed out when using automatic IP assignment or NONE assignment. Otherwise specify here the IPv4 address and mask of the system.
 
 IPv4 default gateway:
 : <input type="text" name="GATEWAY:INDEX" maxlength="15" value="<?=$eth0["GATEWAY:INDEX"]?>" class="narrow" pattern="<?=$validIP4?>" title="IPv4 address A.B.C.D">
-  <input type="text" name="METRIC:INDEX" min="1" max="9999" value="<?=$eth0["METRIC:INDEX"]?>" class="trim"><i class="fa fa-sort-numeric-asc"></i> <em>optional metric (lowest is preferred)</em>
+  <input type="text" name="METRIC:INDEX" min="1" max="9999" value="<?=$eth0["METRIC:INDEX"]?>" class="slim"><i class="fa fa-sort-numeric-asc"></i> <em>optional metric (lowest is preferred)</em>
 
 > Greyed out when using automatic IP assignment. Otherwise specify here the IPv4 address of your router.
 
 </div>
 <div class="eth0-ipv6-INDEX" style="display:none" markdown="1">
 IPv6 address:
-: <input type="text" name="IPADDR6:INDEX" maxlength="39" value="<?=$eth0["IPADDR6:INDEX"]?>" pattern="<?=$validIP6?>" title="IPv6 address nnnn:xxxx::yyyy">
+: <input type="text" name="IPADDR6:INDEX" maxlength="39" value="<?=$eth0["IPADDR6:INDEX"]?>" pattern="<?=$validIP6?>" title="IPv6 address nnnn:xxxx::yyyy">/ <input type="number" name="NETMASK6:INDEX" min="1" max="128" value="<?=$eth0["NETMASK6:INDEX"]?>" class="slim">
 
-> Greyed out when using automatic IP assignment. Otherwise specify here the IPv6 address of the system.
-
-IPv6 prefix:
-: <input type="number" name="NETMASK6:INDEX" min="1" max="128" value="<?=$eth0["NETMASK6:INDEX"]?>" class="trim">
-
-> Greyed out when using automatic IP assignment. Otherwise specify here the associated prefix value of 1 to 128.
+> Greyed out when using automatic IP assignment. Otherwise specify here the IPv6 address and prefix of the system.
 
 IPv6 default gateway:
 : <input type="text" name="GATEWAY6:INDEX" maxlength="39" value="<?=$eth0["GATEWAY6:INDEX"]?>" pattern="<?=$validIP6?>" title="IPv6 address nnnn:xxxx::yyyy">
diff --git a/plugins/dynamix/EthX.page b/plugins/dynamix/EthX.page
index 5d7e6aa2f..328da6e59 100644
--- a/plugins/dynamix/EthX.page
+++ b/plugins/dynamix/EthX.page
@@ -72,7 +72,7 @@ $(function() {
   });
 <?endif;?>
 <?if ($locked || $service):?>
-  disableForm(form,true);
+  disableForm(form);
 <?endif;?>
 <?if ($no_eth0):?>
   $('input[name="#shut_ethX"]').prop('disabled',true);
@@ -185,43 +185,33 @@ IP address assignment:
 
 <div class="ethX-ipv4-<?=$i?>" style="display:none" markdown="1">
 IPv4 address:
-: <input type="text" name="IPADDR:<?=$i?>" maxlength="15" value="<?=$ethX["IPADDR:$i"]?>" class="narrow" pattern="<?=$validIP4?>" title="IPv4 address A.B.C.D">
-
-> Greyed out when using automatic IP assignment. Otherwise specify here the IPv4 address of the interface.
-
-IPv4 network mask:
-: <select name="NETMASK:<?=$i?>" size="1">
-  <?=mk_option($ethX["NETMASK:$i"], "255.255.0.0", "255.255.0.0");?>
-  <?=mk_option($ethX["NETMASK:$i"], "255.255.252.0", "255.255.252.0");?>
-  <?=mk_option($ethX["NETMASK:$i"], "255.255.254.0", "255.255.254.0");?>
-  <?=mk_option($ethX["NETMASK:$i"], "255.255.255.0", "255.255.255.0");?>
-  <?=mk_option($ethX["NETMASK:$i"], "255.255.255.128", "255.255.255.128");?>
-  <?=mk_option($ethX["NETMASK:$i"], "255.255.255.192", "255.255.255.192");?>
-  <?=mk_option($ethX["NETMASK:$i"], "255.255.255.224", "255.255.255.224");?>
-  <?=mk_option($ethX["NETMASK:$i"], "255.255.255.240", "255.255.255.240");?>
-  <?=mk_option($ethX["NETMASK:$i"], "255.255.255.248", "255.255.255.248");?>
-  <?=mk_option($ethX["NETMASK:$i"], "255.255.255.252", "255.255.255.252");?>
+: <input type="text" name="IPADDR:<?=$i?>" maxlength="15" value="<?=$ethX["IPADDR:$i"]?>" class="narrow" pattern="<?=$validIP4?>" title="IPv4 address A.B.C.D">/ <select name="NETMASK:<?=$i?>" size="1" class="slim">
+  <?=mk_option($ethX["NETMASK:$i"], "255.255.0.0", "16");?>
+  <?=mk_option($ethX["NETMASK:$i"], "255.255.252.0", "22");?>
+  <?=mk_option($ethX["NETMASK:$i"], "255.255.254.0", "23");?>
+  <?=mk_option($ethX["NETMASK:$i"], "255.255.255.0", "24", $ethX["IPADDR:$i"]?"":"selected");?>
+  <?=mk_option($ethX["NETMASK:$i"], "255.255.255.128", "25");?>
+  <?=mk_option($ethX["NETMASK:$i"], "255.255.255.192", "26");?>
+  <?=mk_option($ethX["NETMASK:$i"], "255.255.255.224", "27");?>
+  <?=mk_option($ethX["NETMASK:$i"], "255.255.255.240", "28");?>
+  <?=mk_option($ethX["NETMASK:$i"], "255.255.255.248", "29");?>
+  <?=mk_option($ethX["NETMASK:$i"], "255.255.255.252", "30");?>
   </select>
 
-> Greyed out when using automatic IP assignment. Otherwise specify here the associated network mask, by default 255.255.255.0 is selected.
+> Greyed out when using automatic IP assignment. Otherwise specify here the IPv4 address and mask of the interface.
 
 IPv4 default gateway:
 : <input type="text" name="GATEWAY:<?=$i?>" maxlength="15" value="<?=$ethX["GATEWAY:$i"]?>" class="narrow" pattern="<?=$validIP4?>" title="IPv4 address A.B.C.D">
-  <input type="text" name="METRIC:<?=$i?>" min="1" max="9999" value="<?=$ethX["METRIC:$i"]?>" class="trim"><i class="fa fa-sort-numeric-asc"></i> <em>optional metric (lowest is preferred)</em>
+  <input type="text" name="METRIC:<?=$i?>" min="1" max="9999" value="<?=$ethX["METRIC:$i"]?>" class="slim"><i class="fa fa-sort-numeric-asc"></i> <em>optional metric (lowest is preferred)</em>
 
 > Greyed out when using automatic IP assignment. Otherwise specify here the IPv4 address of your router.
 
 </div>
 <div class="ethX-ipv6-<?=$i?>" style="display:none" markdown="1">
 IPv6 address:
-: <input type="text" name="IPADDR6:<?=$i?>" maxlength="39" value="<?=$ethX["IPADDR6:$i"]?>" pattern="<?=$validIP6?>" title="IPv6 address nnnn:xxxx::yyyy">
+: <input type="text" name="IPADDR6:<?=$i?>" maxlength="39" value="<?=$ethX["IPADDR6:$i"]?>" pattern="<?=$validIP6?>" title="IPv6 address nnnn:xxxx::yyyy">/ <input type="number" name="NETMASK6:<?=$i?>" min="1" max="128" value="<?=$ethX["NETMASK6:$i"]?>" class="slim">
 
-> Greyed out when using automatic IP assignment. Otherwise specify here the IPv6 address of the interface.
-
-IPv6 prefix:
-: <input type="number" name="NETMASK6:<?=$i?>" min="1" max="128" value="<?=$ethX["NETMASK6:$i"]?>" class="trim">
-
-> Greyed out when using automatic IP assignment. Otherwise specify here the associated prefix value of 1 to 128.
+> Greyed out when using automatic IP assignment. Otherwise specify here the IPv6 address and prefix of the interface.
 
 IPv6 default gateway:
 : <input type="text" name="GATEWAY6:<?=$i?>" maxlength="39" value="<?=$ethX["GATEWAY6:$i"]?>" pattern="<?=$validIP6?>" title="IPv6 address nnnn:xxxx::yyyy">
@@ -284,43 +274,33 @@ IP address assignment:
 
 <div class="ethX-ipv4-<?=$i?>" style="display:none" markdown="1">
 IPv4 address:
-: <input type="text" name="IPADDR:<?=$i?>" maxlength="15" value="<?=$ethX["IPADDR:$i"]?>" class="narrow" pattern="<?=$validIP4?>" title="IPv4 address A.B.C.D">
-
-> Greyed out when using automatic IP assignment or NONE assignment. Otherwise specify here the IPv4 address of the interface.
-
-IPv4 network mask:
-: <select name="NETMASK:<?=$i?>" size="1">
-  <?=mk_option($ethX["NETMASK:$i"], "255.255.0.0", "255.255.0.0");?>
-  <?=mk_option($ethX["NETMASK:$i"], "255.255.252.0", "255.255.252.0");?>
-  <?=mk_option($ethX["NETMASK:$i"], "255.255.254.0", "255.255.254.0");?>
-  <?=mk_option($ethX["NETMASK:$i"], "255.255.255.0", "255.255.255.0");?>
-  <?=mk_option($ethX["NETMASK:$i"], "255.255.255.128", "255.255.255.128");?>
-  <?=mk_option($ethX["NETMASK:$i"], "255.255.255.192", "255.255.255.192");?>
-  <?=mk_option($ethX["NETMASK:$i"], "255.255.255.224", "255.255.255.224");?>
-  <?=mk_option($ethX["NETMASK:$i"], "255.255.255.240", "255.255.255.240");?>
-  <?=mk_option($ethX["NETMASK:$i"], "255.255.255.248", "255.255.255.248");?>
-  <?=mk_option($ethX["NETMASK:$i"], "255.255.255.252", "255.255.255.252");?>
+: <input type="text" name="IPADDR:<?=$i?>" maxlength="15" value="<?=$ethX["IPADDR:$i"]?>" class="narrow" pattern="<?=$validIP4?>" title="IPv4 address A.B.C.D">/ <select name="NETMASK:<?=$i?>" size="1" class="slim">
+  <?=mk_option($ethX["NETMASK:$i"], "255.255.0.0", "16");?>
+  <?=mk_option($ethX["NETMASK:$i"], "255.255.252.0", "22");?>
+  <?=mk_option($ethX["NETMASK:$i"], "255.255.254.0", "23");?>
+  <?=mk_option($ethX["NETMASK:$i"], "255.255.255.0", "24", $ethX["IPADDR:$i"]?"":"selected");?>
+  <?=mk_option($ethX["NETMASK:$i"], "255.255.255.128", "25");?>
+  <?=mk_option($ethX["NETMASK:$i"], "255.255.255.192", "26");?>
+  <?=mk_option($ethX["NETMASK:$i"], "255.255.255.224", "27");?>
+  <?=mk_option($ethX["NETMASK:$i"], "255.255.255.240", "28");?>
+  <?=mk_option($ethX["NETMASK:$i"], "255.255.255.248", "29");?>
+  <?=mk_option($ethX["NETMASK:$i"], "255.255.255.252", "30");?>
   </select>
 
-> Greyed out when using automatic IP assignment or NONE assignment. Otherwise specify here the associated network mask, by default 255.255.255.0 is selected.
+> Greyed out when using automatic IP assignment or NONE assignment. Otherwise specify here the IPv4 address and mask of the interface.
 
 IPv4 default gateway:
 : <input type="text" name="GATEWAY:<?=$i?>" maxlength="15" value="<?=$ethX["GATEWAY:$i"]?>" class="narrow" pattern="<?=$validIP4?>" title="IPv4 address A.B.C.D">
-  <input type="text" name="METRIC:<?=$i?>" min="1" max="9999" value="<?=$ethX["METRIC:$i"]?>" class="trim"><i class="fa fa-sort-numeric-asc"></i> <em>optional metric (lowest is preferred)</em>
+  <input type="text" name="METRIC:<?=$i?>" min="1" max="9999" value="<?=$ethX["METRIC:$i"]?>" class="slim"><i class="fa fa-sort-numeric-asc"></i> <em>optional metric (lowest is preferred)</em>
 
 > Greyed out when using automatic IP assignment. Otherwise specify here the IPv4 address of your router.
 
 </div>
 <div class="ethX-ipv6-<?=$i?>" style="display:none" markdown="1">
 IPv6 address:
-: <input type="text" name="IPADDR6:<?=$i?>" maxlength="39" value="<?=$ethX["IPADDR6:$i"]?>" pattern="<?=$validIP6?>" title="IPv6 address nnnn:xxxx::yyyy">
+: <input type="text" name="IPADDR6:<?=$i?>" maxlength="39" value="<?=$ethX["IPADDR6:$i"]?>" pattern="<?=$validIP6?>" title="IPv6 address nnnn:xxxx::yyyy">/ <input type="number" name="NETMASK6:<?=$i?>" min="1" max="128" value="<?=$ethX["NETMASK6:$i"]?>" class="slim">
 
-> Greyed out when using automatic IP assignment. Otherwise specify here the IPv6 address of the interface.
-
-IPv6 prefix:
-: <input type="number" name="NETMASK6:<?=$i?>" min="1" max="128" value="<?=$ethX["NETMASK6:$i"]?>" class="trim">
-
-> Greyed out when using automatic IP assignment. Otherwise specify here the associated prefix value of 1 to 128.
+> Greyed out when using automatic IP assignment. Otherwise specify here the IPv6 address and prefix of the interface.
 
 IPv6 default gateway:
 : <input type="text" name="GATEWAY6:<?=$i?>" maxlength="39" value="<?=$ethX["GATEWAY6:$i"]?>" pattern="<?=$validIP6?>" title="IPv6 address nnnn:xxxx::yyyy">
@@ -376,43 +356,33 @@ IP address assignment:
 
 <div class="ethX-ipv4-INDEX" style="display:none" markdown="1">
 IPv4 address:
-: <input type="text" name="IPADDR:INDEX" maxlength="15" value="<?=$ethX["IPADDR:INDEX"]?>" class="narrow" pattern="<?=$validIP4?>" title="IPv4 address A.B.C.D">
-
-> Greyed out when using automatic IP assignment or NONE assignment. Otherwise specify here the IPv4 address of the interface.
-
-IPv4 network mask:
-: <select name="NETMASK:INDEX" size="1">
-  <?=mk_option($ethX["NETMASK:INDEX"], "255.255.0.0", "255.255.0.0");?>
-  <?=mk_option($ethX["NETMASK:INDEX"], "255.255.252.0", "255.255.252.0");?>
-  <?=mk_option($ethX["NETMASK:INDEX"], "255.255.254.0", "255.255.254.0");?>
-  <?=mk_option($ethX["NETMASK:INDEX"], "255.255.255.0", "255.255.255.0");?>
-  <?=mk_option($ethX["NETMASK:INDEX"], "255.255.255.128", "255.255.255.128");?>
-  <?=mk_option($ethX["NETMASK:INDEX"], "255.255.255.192", "255.255.255.192");?>
-  <?=mk_option($ethX["NETMASK:INDEX"], "255.255.255.224", "255.255.255.224");?>
-  <?=mk_option($ethX["NETMASK:INDEX"], "255.255.255.240", "255.255.255.240");?>
-  <?=mk_option($ethX["NETMASK:INDEX"], "255.255.255.248", "255.255.255.248");?>
-  <?=mk_option($ethX["NETMASK:INDEX"], "255.255.255.252", "255.255.255.252");?>
+: <input type="text" name="IPADDR:INDEX" maxlength="15" value="<?=$ethX["IPADDR:INDEX"]?>" class="narrow" pattern="<?=$validIP4?>" title="IPv4 address A.B.C.D">/ <select name="NETMASK:INDEX" size="1" class="slim">
+  <?=mk_option($ethX["NETMASK:INDEX"], "255.255.0.0", "16");?>
+  <?=mk_option($ethX["NETMASK:INDEX"], "255.255.252.0", "22");?>
+  <?=mk_option($ethX["NETMASK:INDEX"], "255.255.254.0", "23");?>
+  <?=mk_option($ethX["NETMASK:INDEX"], "255.255.255.0", "24", "selected");?>
+  <?=mk_option($ethX["NETMASK:INDEX"], "255.255.255.128", "25");?>
+  <?=mk_option($ethX["NETMASK:INDEX"], "255.255.255.192", "26");?>
+  <?=mk_option($ethX["NETMASK:INDEX"], "255.255.255.224", "27");?>
+  <?=mk_option($ethX["NETMASK:INDEX"], "255.255.255.240", "28");?>
+  <?=mk_option($ethX["NETMASK:INDEX"], "255.255.255.248", "29");?>
+  <?=mk_option($ethX["NETMASK:INDEX"], "255.255.255.252", "30");?>
   </select>
 
-> Greyed out when using automatic IP assignment or NONE assignment. Otherwise specify here the associated network mask, by default 255.255.255.0 is selected.
+> Greyed out when using automatic IP assignment or NONE assignment. Otherwise specify here the IPv4 address and mask of the interface.
 
 IPv4 default gateway:
 : <input type="text" name="GATEWAY:INDEX" maxlength="15" value="<?=$ethX["GATEWAY:INDEX"]?>" class="narrow" pattern="<?=$validIP4?>" title="IPv4 address A.B.C.D">
-  <input type="text" name="METRIC:INDEX" min="1" max="9999" value="<?=$ethX["METRIC:INDEX"]?>" class="trim"><i class="fa fa-sort-numeric-asc"></i> <em>optional metric (lowest is preferred)</em>
+  <input type="text" name="METRIC:INDEX" min="1" max="9999" value="<?=$ethX["METRIC:INDEX"]?>" class="slim"><i class="fa fa-sort-numeric-asc"></i> <em>optional metric (lowest is preferred)</em>
 
 > Greyed out when using automatic IP assignment. Otherwise specify here the IPv4 address of your router.
 
 </div>
 <div class="ethX-ipv6-INDEX" style="display:none" markdown="1">
 IPv6 address:
-: <input type="text" name="IPADDR6:INDEX" maxlength="39" value="<?=$ethX["IPADDR6:INDEX"]?>" pattern="<?=$validIP6?>" title="IPv6 address nnnn:xxxx::yyyy">
+: <input type="text" name="IPADDR6:INDEX" maxlength="39" value="<?=$ethX["IPADDR6:INDEX"]?>" pattern="<?=$validIP6?>" title="IPv6 address nnnn:xxxx::yyyy">/ <input type="number" name="NETMASK6:INDEX" min="1" max="128" value="<?=$ethX["NETMASK6:INDEX"]?>" class="slim">
 
-> Greyed out when using automatic IP assignment. Otherwise specify here the IPv6 address of the interface.
-
-IPv6 prefix:
-: <input type="number" name="NETMASK6:INDEX" min="1" max="128" value="<?=$ethX["NETMASK6:INDEX"]?>" class="trim">
-
-> Greyed out when using automatic IP assignment. Otherwise specify here the associated prefix value of 1 to 128.
+> Greyed out when using automatic IP assignment. Otherwise specify here the IPv6 address and prefix of the interface.
 
 IPv6 default gateway:
 : <input type="text" name="GATEWAY6:INDEX" maxlength="39" value="<?=$ethX["GATEWAY6:INDEX"]?>" pattern="<?=$validIP6?>" title="IPv6 address nnnn:xxxx::yyyy">