Hi everybody,

I have difficult time when configure load balancing for kamailio servers, i’m very appreciated if you help me figure out the problem.

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I want to setup the system as following:

Both Load Balancer (LB) and Sip Server (SIP) run on Amazon EC2, (LB) using dispatcher module.

I enclose here config files for both (LB) and (SIP). Please view the files attached.

Figure (1) is what i saw when run kamctl dispatcher dump:

Figure (1)

I created 2 users with following information (extract from mysql cluster database, table subscriber):

Figure (2)

Then use sip client (Linphone) connect to (LB), registration is success, below is records from location table:

Figure (3)

But i can’t make call between 2 users. Below is data i get from wireshark:

Load Balancer:

Figure(4)

SIP Server:

Figure (5)

I also enclose 2 files export from wireshark for detail information.