Question 1

What is Kamailio used for?

Accepted Answer

Kamailio is an open-source SIP server used to route, manage, and secure SIP traffic in VoIP networks. It’s ideal for handling large volumes of calls, acting as a proxy, registrar, and even a load balancer.

Question 2

Can Kamailio be used as a load balancer?

Accepted Answer

Yes! Kamailio can function as a SIP load balancer using its dispatcher module. It distributes incoming SIP requests across multiple SIP servers based on routing algorithms.

Question 3

How does Kamailio perform load balancing

Accepted Answer

Kamailio uses the dispatcher module to assign SIP traffic to backend servers. It supports round-robin, hashing, call load-based, and weight-based distribution methods, ensuring traffic is spread efficiently.

Question 4

What is the difference between Kamailio and a traditional load balancer?

Accepted Answer

Traditional load balancers focus on HTTP/HTTPS traffic, while Kamailio is SIP-aware. It understands SIP headers, manages SIP dialogs, and handles real-time VoIP signalling, something general-purpose load balancers can’t do natively.

Question 5

Does Kamailio support failover if a server goes down?

Accepted Answer

Yes. Kamailio can monitor server health and automatically reroute SIP traffic to healthy servers if one fails. This ensures uninterrupted service.

kamailio sip load balancer

Kamailio as Load Balancer: How the Dispatcher Module Distributes SIP Traffic (With Working Config)