NLB with RTSP/HTTP (not secured) protocols RRS feed

  • Question

  • Hello,

    Does a NLB APP-V cluster (multicast, single NIC) support client connection using not secured HTTP / RTSP protocols ?

    For RTSP, I read that in addition to TCP 554 port, there are dynamic ports being opened. If yes, how should I configure my NLB cluster ? I can't include all ports in the NLB because I have a single NIC.



    Tuesday, July 5, 2011 11:45 AM


All replies

  • Hello,


    I don't know if you need others ports in addition to TCP 554, i hope somebody can help us.... but, until i know,  to implement a Microsoft NLB you need two NICs on each server or not?






    Tuesday, July 5, 2011 12:00 PM
  • Tuesday, July 5, 2011 12:21 PM
  • Pavel,

    NLB (multicast) is definitely supported in a single NIC configuration. I have working (non APP-V) NLB clusters in such a configuration.



    Wednesday, July 6, 2011 5:56 AM
  • Znack


    Thanks for your feedback. I already know this guide and unfortunately I have not found any detailled information about NLB configuration support for RTSP (vs. RTSPS).



    Wednesday, July 6, 2011 5:57 AM
  • Have you tried Multicast mode?

    From this page: http://telnetport25.wordpress.com/2008/03/24/quick-tip-configuring-network-load-balancing-nlb-on-windows-2008-for-exchange-cas-servers/

    In Unicast Mode, NLB modifies the Network Adapters MAC address to Cluster MAC. Now, there is only one MAC Address available in cluster – that is Cluster MAC and this MAC address has to be same on all cluster hosts. Network Re-director can’t forward the request to same MAC Address if it is originating from the same source and also host cannot communicate with each other – This is the disadvantage of Unicast Mode with Single NIC. To enable hosts to talk to each other, enable either MULTI-CAST mode or install a second NIC. 

    This not a limitation or an issue with RTSP itself. If NLB requires two NICs to achieve the desired configuration, then you'll have to add another NIC.

    This forum post is my own opinion and does not necessarily reflect the opinion or view of Microsoft, its employees, or other MVPs.
    Wednesday, July 6, 2011 7:20 AM
  • Aaron,


    I am already targetting Multicast (Unicast is not an option)... I am just looking for official guidelines for NLB settings in case of RTSP protocol. As explained below, I have been told they are dynamic ports being opened but I can't find any official information.



    Wednesday, July 6, 2011 12:03 PM
  • Hello,


    See official network guide;


    • Proposed as answer by znack Thursday, July 7, 2011 10:34 AM
    • Marked as answer by Sylvain06 Thursday, July 7, 2011 3:00 PM
    Thursday, July 7, 2011 10:34 AM
  • Thanks Znack !
    Thursday, July 7, 2011 3:01 PM