Diff. between Web Dispatcher and ICM

[Former Member]

hi gurus,

Please help to understand the Difference between Web Dispatcher and ICM in whereas ways like

When do we use which tool?

The architec differences between them?

Anything more that would help me to understand better!

Thanks a lot in advance

Regards

Sekhar

[Former Member · Accepted solution]

Hi,

1. ICM --> Internet Communication Manager, it is the communication between internet user and R/3 system(Integrated ITS).

2. Web Dispatcher--> Generally we used this in BW systems for communication between web processes.

Regards,

Srini Nookala

[Former Member]

In short words :

The ICM is a Web server.

The web dispatcher is a reverse proxy and a load balancer.

Olivier

[former_member185954]

excellent,

couldn't say it in better words

Regards,

Siddhesh

[Former Member]

The web dispatcher has additional important features:

1. All the http connection for example is being done with specific server and specific port, of the web dispatcher (for example http://AppServ1:80/).

In case you have number of servers, this may be useful.

2. The WD can be installed on other server from the application server. Can used due to security reasons .

There are some more features, but this two is the major.

The WD load balancing is similar to the http message sever load balancing. If you don't need the additional features of the WD, you don't need to use it.

[Former Member]

Hi

At top level, Web dispatcher is like simple dispatcher which handles all the internet related requests like Http, Https, Smtp.

ICM is Internet connection Manager which is used to administer the flow between SAP and outside world using HTTP, HTTPs, SMTP

Please read these

Web Dispatcher

http://help.sap.com/saphelp_47x200/helpdata/en/42/5cfd3b0e59774ee10000000a114084/content.htm

ICM

http://help.sap.com/saphelp_nw04/helpdata/en/0a/a7903febb15a7be10000000a11405a/content.htm