Hello Rajdeep,
for which connections do you need load balancing? HTTP, GUI or RFC? For load balancing of HTTP connections through message server please have a look at the documentation:
Message Server-Based Logon and Load Balancing (Redirection) - SAP High Availability - SAP Library
and
HTTP Load Distribution Using SAP Message Server - SAP Web Dispatcher - SAP Library
Regards,
Alwina