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SonicOS Enhanced 4.0 Administrator Guide
Details of Load Balancing Algorithms
This appendix describes how the SonicWALL security appliance applies the load balancing
algorithms:
• Round Robin - Source IP connects to Destination IP alternately
• Random Distribution - Source IP connects to Destination IP randomly
• Sticky IP - Source IP connects to same Destination IP
• Block Remap - Source network is divided by size of the Destination pool to create logical
segments
• Symmetrical Remap - Source IP maps to Destination IP (for example, 10.1.1.10 ->
192.168.60.10.)
Sticky IP Algorithm
Source IP is modulo with the size of the server cluster to determine the server to remap it to.
The following two examples show how the Sticky IP algorithm works.