Hello Surya,
The communication from the Web Dispatcher to the backend will depend on the parameter "wdisp/ssl_encrypt".
This is related to the communication from the end users through the Web Dispatcher.
The other parameters you have set:
wdisp/server_info_protocol = https
wdisp/group_info_protocol = https
wdisp/url_map_protocol = https
wdisp/ping_protocol = https
configure the Web Dispatcher to fetch the backend data through HTTPS (which instances are up, logon groups, test - "ping" - the instance to confirm that it is responding, etc.).
If you have two systems, you need to consider the system selection criteria.
For example, system ABC is an ECC system and system DEF is a Portal system.
I would configure the Web Dispatcher like:
wdisp/system_0 = SID=ABC, MSHOST=abc.company.com, MSSPORT=44300, SRCURL=/sap;/SAP;/nwbc
wdisp/system_1 = SID=DEF, MSHOST=def.company.com, MSSPORT=44300, SRCURL=/
The order of the wdisp/system_X parameters is important (see wdisp/system_conflict_resolution).
There are other selection criterias. Read this page.
Regards,
Isaías