Basically Web Dispatcher is configured in EP Server so that Load Balancing is done.
Configuration Steps:
1) Copy the sapwebdisp.exe and icmadmin.SAR files to a directory on the portal server c:\usr\sap\DEV\JC01\exe to configure the web dispatcher
2) Above two files will be available in c:\usr\sap\<SID>\JC<>\exe\uc\NTI386(Kernel folder)
3) Uncar the file icmadmin.SAR , using SAPCAR tool.
4) SAPCAR tool will be available in c:\usr\sap\DEV\SYS\exe\uc\NTI386 folder copy the sapcar.exe to c:\usr\sap\<SID>\JC<>\exe
5) In command prompt go to c:\usr\sap\<SID>\JC<>\exe and enter the command SAPCAR -xvf icmadmin.SAR
6) In the command prompt go to the directory c:\usr\sap\<SID>\JC<>\exe and enter sapwebdisp -bootstrap
7) Above command will generate the profile file sapwebdisp.pfl.
8) Enter message server host name (portal server host name)
9) Enter http port for message server as 8100
10) Instance number as 00
11) Http port number for web dispatcher:60000(any number you like)
12) Create configuration for large(l)
13) Profile will be generated.
14) After generation of PFL file successfully the URL will be displayed on command prompt
15) http://portalhostname:port/sap/wdisp/admin/default.html
16) Enter username as icmadm and password:XXX
17) Now portal can be accessed from the following URL http://portalhostname:port/irj
18) To run the web dispatcher type the command sapebdisp pf=sapwebdisp.pfl in command prompt
19) To create service copy the ntsmgr.exe file from c:\usr\sap\<SID>\JC<>\exe\uc\NTI386 to c:\usr\sap\<SID>\JC<>\exe
20) Go to the c:\usr\sap\<SID>\JC<>\exe using command prompt and enter following command
ntscmgr install SAPWebdispatcher -b <drive>:\usr\sap\<SID>\ JC<xx>\exe\sapwebdisp.exe -p service pf=sapwebdisp.pfl
21) Then service will be created in portal server
To redirect URL edit sapwebdisp.pfl file and add the following parameter
# SAP Web Dispatcher Web Administration
icm/HTTP/redirect_0 = PREFIX=/, TO=/irj/index.html
22) Restart the web dispatcher
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