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

7
Working mechanism of firewall load balancing
Firewall load balancing supports IPv4 and IPv6.
Figure 7 Network diagram
Firewall load balancing comprises the following elements:
• Cluster—A cluster consists of LB modules and firewalls to provide network traffic load balancing.
• LB module—A device that distributes traffic from the request sender to multiple firewalls. LB modules
fall into level 1 LB modules and level 2 LB modules. In Figure 7, if traffic is from Host A to Host B, LB
module
A is level 1, and LB module B is level 2. If traffic is from Host B to Host A, LB module B is level
1, and LB module A is level 2.
• Firewall—A firewall filters packets.
Figure 8 Work flow of firewall load balancing
Firewall load balancing operates in the following way:
1. LB module A receives the traffic from the source.