Presentation server 3 failover farm

Posted on 2005-05-02
Last Modified: 2010-07-27
I am new with citrix and had some questions about failover farms. I have a project to impliment a failover citrix farm in my office. Its a 2 node farm and I need ether active/active of active/failover. I am very familiar with network loadbalancing and failover on firewalls/loadbalancers/router etc. I cannot find any information about how citrix does failover. I did an install in a lab and dont see any place for me to create a virtual IP for the cluste. If you dont have a virtual IP how does the failover work? Can someone give me some insight as to how citrix handles redundancy?


Question by:dmgadmin
    LVL 6

    Expert Comment

    They call it load-balancing in the Citrix world.



    Author Comment

    so is failover achieved by publishing an appilication and assigning it to both servers, then creating the ICA client to connect to the application and not the server?
    LVL 4

    Accepted Solution

    There is no "failover" in Citrix as this would require all the servers in the farm to Share the session data. If the server you are on dies then you loose your session and any unsaved data.
    Citrix will load balance automatically accross all of the servers in your farm you can alter the load evaluators depending on how you set up the farm.
    When publishing apps obvously ensure it is on all the server you want to use and when published assign to both of your servers then when your users connect the least busy server (load evaluators) will pick up the request.

    LVL 16

    Expert Comment

    The above is correct the sevrers in your farm have to  have the same apps etc published on them either on full desktop or pubished apps. When one a server goes down the load balancing basiclly takes the server that has gone down out the equation. When a user logs in the load balancing looks to see what server on your farm is most FREE and sends the users to that server.

    If the server is down the load balancing will not have a choice but just send the users to the only avalible server in your farm

    hope this helps
    LVL 4

    Expert Comment


    have any of us given you an acceptable answer or do you stil require more information?

    Expert Comment

    Please revisit this post.......I just took over a job with two Citrix Servers in a farm that don't seem to be load balancing.  I have Metaframe Presentation Server 3.0.

    When I go into the "Load Manage Servers" window (by right clicking on the server folder), it shows both of my servers under "Available Servers"  When I select them and move them to "Selected Servers" and click apply, they both go back to "available".......

    Am I doing something wrong?  

    As it stands, no matter what I make the thresholds on the one server, no users ever get sent to the second server, even when the first serve is at 100% for anything.

    Thank you,

    LVL 4

    Expert Comment

    All you can do from load manage servers is to apply a load evaluator.

    With your published apps/desktops under properties of the app do you have both servers selected it?


    Expert Comment

    Even under the Published Apps/Desktops, when I try to move my two servers from the available column to the selected column and click apply, they fly right back to the available column.


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