You can add a server pool to manage and share backend servers flexibly and efficiently. A pool manages load balancer distribution methods and has a service monitor attached to it for health check parameters.
Round-Robin: Pretty simple to understand, it just keeps flip-flopping equally between all the servers in the pool.
Least Conn: The server with the least connections will be sent the next client request.
IP-Hash: Selects a server-based on a hash of an IP address and a weighting.
HTTP HEADER: HTTP Header name is looked up. Server host name can be determined.
URL: Selects a server by basically a hash of the URL and a weighting.
URI: Left part of the URL is hashed and weighted.