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<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">Hi Aldo,
<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Tahoma","sans-serif";color:black">1.- What </span><span style="font-size:10.0pt;font-family:"Verdana","sans-serif";color:black;background:white">load balancer</span><span style="font-size:10.0pt;font-family:"Tahoma","sans-serif";color:black"> is
recommended? I would suppose that not all of them will load balance the UDP RADIUS well, I see many appliance, brands, etc.. just a thought<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Tahoma","sans-serif";color:black">I use a pair of High Availability Kemp LM 2600’s in my environment and they work like a charm. I’ve also used Barracuda appliances, and F5’s. Of all of them,
the Kemps were the cheapest to purchase, and I’ve been really happy with their support and service.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Tahoma","sans-serif";color:black"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Tahoma","sans-serif";color:black">2.- Will this scenario cover the fail-over part? when one of my two FreeRADIUS servers stop working, or restart, or crash will the load balancer appliance start
sending packets only to the live server until it gets back up?<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Tahoma","sans-serif";color:black">Yes it will. Part of the logic built into the load balancers is all about uptime. It’s a little off topic here, but the answer is absolutely yes on all counts.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Tahoma","sans-serif";color:black"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Tahoma","sans-serif";color:black"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Tahoma","sans-serif";color:black">3.- Isn't the load balancer a single point of failure itself? How is this potential problem usually addressed?<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Tahoma","sans-serif";color:black">Yes and No…It is if you only purchase 1 load balancer. Whenever you are putting together a redundant HA environment, you always buy two. 100% of the LB’s out
there are designed to work in a “HA” (High Availability) partnership. <o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Tahoma","sans-serif";color:black"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Tahoma","sans-serif";color:black">Hope that helps.
<o:p></o:p></span></p>
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<p class="MsoNormal"><b><span style="font-size:10.0pt;font-family:"Tahoma","sans-serif"">From:</span></b><span style="font-size:10.0pt;font-family:"Tahoma","sans-serif""> freeradius-users-bounces+jjulson=marketron.com@lists.freeradius.org [mailto:freeradius-users-bounces+jjulson=marketron.com@lists.freeradius.org]
<b>On Behalf Of </b>Aldo Zavala<br>
<b>Sent:</b> Wednesday, July 25, 2012 1:27 AM<br>
<b>To:</b> freeradius-users@lists.freeradius.org<br>
<b>Subject:</b> Load Balance two FreeRADIUS servers (question)<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Tahoma","sans-serif";color:black">Hi, I have reading few posts that ask how to Load Balance Two or more FreeRADIUS servers, and usually the expert's (Alan and others) answer is to put a </span><span style="font-size:10.0pt;font-family:"Verdana","sans-serif";color:black;background:white">load
balancer</span><span style="font-size:10.0pt;font-family:"Tahoma","sans-serif";color:black"> in front of the FreeRADIUS servers, I will trust you but I still have some questions about this:
<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Tahoma","sans-serif";color:black"><o:p> </o:p></span></p>
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<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Tahoma","sans-serif";color:black">1.- What </span><span style="font-size:10.0pt;font-family:"Verdana","sans-serif";color:black;background:white">load balancer</span><span style="font-size:10.0pt;font-family:"Tahoma","sans-serif";color:black"> is
recommended? I would suppose that not all of them will load balance the UDP RADIUS well, I see many appliance, brands, etc.. just a thought<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Tahoma","sans-serif";color:black"><o:p> </o:p></span></p>
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<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Tahoma","sans-serif";color:black">2.- Will this scenario cover the fail-over part? when one of my two FreeRADIUS servers stop working, or restart, or crash will the load balancer appliance start
sending packets only to the live server until it gets back up?<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Tahoma","sans-serif";color:black"><o:p> </o:p></span></p>
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<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Tahoma","sans-serif";color:black">3.- Isn't the load balancer a single point of failure itself? How is this potential problem usually addressed?<br>
<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Tahoma","sans-serif";color:black">Thanks!!<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Tahoma","sans-serif";color:black"><o:p> </o:p></span></p>
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<p class="MsoNormal" style="margin-bottom:12.0pt"><span style="font-size:10.0pt;font-family:"Tahoma","sans-serif";color:black">Aldo Zavala<o:p></o:p></span></p>
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