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Former Member

Dispatcher port

Hi all,

I have a basic doubt.

We can have message server port of our choice.Now the question is whether we can block the dispatcher ports and just allow message server port for the users to login. Users get the info from message server about the server info but will it use dispatcher port thats my doubt.

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4 Answers

  • Best Answer
    Jan 13, 2012 at 11:41 PM

    Hello,

    GUI users initially connect to the message server (on the sapmsSID port) if their SAPLOGON entry refers to a logon group rather than to a specific server. However, once the message server has selected an instance based on its load-balancing stats and connected the GUI session to that instance, all communication between the GUI and the application server flows via the dispatcher port (sapdp##); the message server does not intervene in this. It follows that the dispatcher ports cannot be blocked to end users.

    Regards,

    Mark

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    Former Member
    Jan 13, 2012 at 12:32 PM

    Hi,

    Users has to connect Msg Server and MSG server in turn directs the call to dispatcher.

    I guess, you have HA system and want to provide users with message server host name instead of app server ? if yes, then you can give MSG server host name to users. However, wherever the MSG server host lies between both nodes, users connect to that particular server , because load balancing needs login group created in SMLG and rz12.

    Regards,

    Arjun

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    Former Member
    Jan 13, 2012 at 12:53 PM

    Hello Ambarish,

    Your query is not clear. Can you please brief about your requirement.

    Thanks,

    Siva Kumar

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    Former Member
    Jan 13, 2012 at 01:06 PM

    Hi,

    You can not block dispatcher port.otherwise how users will login to dialog instance internally?

    If i remember the connection flow,user request from SAP GUI first comes to message server then message server check which dialog insatance is comparatively free and depending on that it dispatch request to that particular dispatcher.

    Dispatcher dispatches requests to the Work Processes. If all work processes are busy at the moment, the requests are queued in the dispatcher-Queue.

    We give message server port for load balancing and Disp port for direct logon.

    Hope it clarifies for you.

    Regards,

    Ashutosh

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