R3204P16-HP Load Balancing Module Load Balancing Configuration Guide-6PW101

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• Direct routing (DR)-mode server load balancing
NAT-mode server load balancing
Figure 1 Network diagram for NAT-mode server load balancing
NAT-mode server load balancing includes the following basic elements:
• Cluster: A cluster that provides specific services, including an LB device and multiple servers.
• LB device: A device that distributes different service requests to multiple servers.
• Server: A server that responds to and processes different service requests.
• VSIP: Virtual Service IP address of the cluster, used for users to request services.
• Server IP: IP address of a server, used for an LB device to distribute service requests.
Figure 2 Work flow of NAT-mode server load balancing
The following describes the work flow of NAT-mode server load balancing.
1. The host sends a request, with the host IP being the source IP and VSIP being the destination IP.