<!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 14:47:48" />
    <title>AAA Server Monitoring </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=1559;
  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="wp1072972"> </a><h1 class="pTitle">
AAA Server Monitoring

</h1>
<a name="wp1072973"> </a><p class="pBody">
An unresponsive AAA server introduces a delay in the processing of AAA requests. An MDS switch can 
periodically monitor an AAA server to check whether it is responding (or alive) to save time in 
processing AAA requests. The MDS switch marks unresponsive AAA servers as dead and does not send 
AAA requests to any dead AAA servers. An MDS switch periodically monitors dead AAA servers and 
brings them to the alive state once they are responding. This monitoring process verifies that an AAA 
server is in a working state before real AAA requests are sent its way. Whenever an AAA server changes 
to the dead or alive state, an SNMP trap is generated and the MDS switch warns the administrator that 
a failure is taking place before it can impact performance. 

</p>
<a name="wp1072983"> </a><p class="pBodyAutonumNoRule">
<strong>Note	&nbsp;&nbsp;&nbsp;</strong> The monitoring interval for alive servers and dead servers is different and can be configured by the user. 
The AAA server monitoring is performed by sending a test authentication request to the AAA server.

</p>
<a name="wp1072984"> </a><p class="pBody">
The user name and password to be used in the test packet can be configured.

</p>
<a name="wp1072990"> </a><p class="pBody">
See the <a href="cradtac145.html">&quot;Configuring the RADIUS, TACACS+, and LDAP Server&quot; topic</a>.

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

    </blockquote>

  </body>
</html>
