F3215-HP Load Balancing Module System Management Configuration Guide-6PW101

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Install the LB module into the core switch. The access switch connects the server cluster to the core switch.
The LB module's IP address is used as the gateway IP address on each server and the LB module uses
NAT to achieve server load balancing.
Figure 3 Network diagram
In large data centers of carriers and portal websites
Generally, load balancing is implemented in large data centers of carriers and portal websites. In this
scenario, one or two LB modules are installed on each stateful failover-capable distribution layer switch,
and VRRP is enabled on the LB modules for high reliability.