kamailio dispatcher can not forward call in Amazon EC2 - sr-users

22 Dec 2016

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.

This email contain images, if you can see images please read problem_detail.pdf.

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.