<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">

<!-- saved from url=(0014)about:internet -->
<html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en" lang="en">
  <head>
    <meta http-equiv="Content-Type" content="text/html; charset=UTF-8" />
    <meta http-equiv="Content-Style-Type" content="text/css" />
    <meta name="GENERATOR" content="Quadralay WebWorks AutoMap 2003 Platinum Edition Client for FrameMaker 8.6.6597.0" />
    <meta name="TEMPLATEBASE" content="emwebh8-1-17" />
    <meta name="LASTUPDATED" content="08/01/13 14:48:17" />
    <title>Interface Subnet Requirements </title>
    <!-- Copyright 2010-2013, Cisco Systems, Inc. All rights reserved. -->

    <link rel="StyleSheet" href="document.css" type="text/css" />
    <link rel="StyleSheet" href="catalog.css" type="text/css" />


<script> 
    var is_chrome = navigator.userAgent.toLowerCase().indexOf('chrome') > -1; 
   
    if(is_chrome){document.domain=document.domain}
   </script>
    <script type="text/javascript" language="JavaScript1.2" src="expand.js"></script>
    <script type="text/javascript" language="JavaScript1.2" src="page.js"></script>

    <script type="text/javascript" language="JavaScript1.2">
     <!--
      function  WWNoOp() {}
      function  WWNoValue() { return ""; }

      var  VarDropDown;

      if (typeof(HTMLHelp_Object) != "undefined")
      {
        VarDropDown = new WWDropDown_Object();
      }
      else
      {
        VarDropDown = new Object();
        VarDropDown.fAnchorOpen  = WWNoOp;
        VarDropDown.fAnchorClose = WWNoOp;
        VarDropDown.fDIVOpen  = WWNoOp;
        VarDropDown.fDIVClose = WWNoOp;
      }
     // -->
    </script>

  
<SCRIPT language="javascript">
<!--
  self.document.write("<link href='"+top.relPath+"shared/style.css' rel='stylesheet' type='text/css'>");
  myid=2104;
  self.document.write("<script type='text/javascript' language='JavaScript' src='"+top.relPath+"shared/con_utils.js'></scr"+"ipt>");
//-->
</SCRIPT>
</head>

  <body onload="highlightSearchTerms();" bgcolor="#ffffff">

    
    <blockquote>
    <a name="top"></a>

    
    


<a name="wp1073629"> </a><h1 class="pTitle">
Interface Subnet Requirements

</h1>
<a name="wp1073631"> </a><p class="pBody">
Gigabit Ethernet interfaces (major), subinterfaces (VLAN ID), and management interfaces (mgmt 0) can 
be configured in the same or different subnet depending on the configuration (see <a href="ips15.html#wp1073641">Table&#160;6-1</a>).

</p>
<a name="wp1073705"> </a><p class="pBodyRelative">
</p><div>
<table border="2" cellpadding="2" id="wp1073641table1073635">
  <caption><a name="wp1073641"> </a><div class="pTableTitle">
Table&#160;6-1	Subnet Requirements for Interfaces &#160;

</div>
</caption>
  <tr bgcolor="#CCCCCC" align="left" valign="middle">    <th><a name="wp1073649"> </a><p class="pCellHeading">
Interface 1 

</p>
</th>
    <th><a name="wp1073651"> </a><p class="pCellHeading">
Interface 2 

</p>
</th>
    <th><a name="wp1073653"> </a><p class="pCellHeading">
Same Subnet

</p>
<a name="wp1073654"> </a><p class="pCellHeading">
Allowed

</p>
</th>
    <th><a name="wp1073656"> </a><p class="pCellHeading">
Notes

</p>
</th>
</tr>
  <tr align="left" valign="top">    <td><a name="wp1073658"> </a><p class="pBody">
Gigabit Ethernet 1/1 

</p>
</td>
    <td><a name="wp1073660"> </a><p class="pBody">
Gigabit Ethernet 1/2

</p>
</td>
    <td><a name="wp1073662"> </a><p class="pBody">
<span style="font-style: normal; font-variant: normal; font-weight: normal; text-decoration: none">Yes
</span>
</p>
</td>
    <td><a name="wp1073664"> </a><p class="pBody">
Two major interfaces can be configured in the same 
or different subnets.

</p>
</td>
</tr>
  <tr align="left" valign="top">    <td><a name="wp1073666"> </a><p class="pBody">
Gigabit Ethernet 1/1.100

</p>
</td>
    <td><a name="wp1073668"> </a><p class="pBody">
Gigabit Ethernet 1/2.100

</p>
</td>
    <td><a name="wp1073670"> </a><p class="pBody">
<span style="font-style: normal; font-variant: normal; font-weight: normal; text-decoration: none">Yes
</span>
</p>
</td>
    <td><a name="wp1073672"> </a><p class="pBody">
Two subinterfaces with the same VLAN ID can be 
configured in the same or different subnets.

</p>
</td>
</tr>
  <tr align="left" valign="top">    <td><a name="wp1073674"> </a><p class="pBody">
Gigabit Ethernet 1/1.100

</p>
</td>
    <td><a name="wp1073676"> </a><p class="pBody">
Gigabit Ethernet 1/2.200

</p>
</td>
    <td><a name="wp1073678"> </a><p class="pBody">
No

</p>
</td>
    <td><a name="wp1073680"> </a><p class="pBody">
Two subinterfaces with different VLAN IDs cannot 
be configured in the same subnet.

</p>
</td>
</tr>
  <tr align="left" valign="top">    <td><a name="wp1073682"> </a><p class="pBody">
Gigabit Ethernet 1/1 

</p>
</td>
    <td><a name="wp1073684"> </a><p class="pBody">
Gigabit Ethernet 1/1.100 

</p>
</td>
    <td><a name="wp1073686"> </a><p class="pBody">
No

</p>
</td>
    <td><a name="wp1073688"> </a><p class="pBody">
A subinterface cannot be configured on the same 
subnet as the major interface.

</p>
</td>
</tr>
  <tr align="left" valign="top">    <td><a name="wp1073690"> </a><p class="pBody">
mgmt0 

</p>
</td>
    <td><a name="wp1073692"> </a><p class="pBody">
Gigabit Ethernet 1/1.100 

</p>
</td>
    <td><a name="wp1073694"> </a><p class="pBody">
No

</p>
</td>
    <td colspan="1" rowspan="2"><a name="wp1073696"> </a><p class="pBody">
The mgmt0 interface cannot be configured in the 
same subnet as the Gigabit Ethernet interfaces or 
subinterfaces.

</p>
</td>
</tr>
  <tr align="left" valign="top">    <td><a name="wp1073698"> </a><p class="pBody">
mgmt0 

</p>
</td>
    <td><a name="wp1073700"> </a><p class="pBody">
Gigabit Ethernet 1/1 

</p>
</td>
    <td><a name="wp1073702"> </a><p class="pBody">
No

</p>
</td>
</tr>
</table>
</div>
<p class="pBodyRelative">
</p>
<a name="wp1073709"> </a><p class="pBodyAutonumNoRule">
<strong>Note	&nbsp;&nbsp;&nbsp;</strong> The configuration requirements in <a href="ips15.html#wp1073641">Table&#160;6-1</a> also apply to Ethernet PortChannels.

</p>
<hr /><br><p class="pBody">Copyright 2010-2013, Cisco Systems, Inc. All rights reserved.</p> 

    </blockquote>

  </body>
</html>
