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Sonic OS 2.x Quick Start Guide
WAN Load Balancing
As previously mentioned, the Load Balancing capability can be Active-Passive, or Active-Active.
If you decide to use the Active-Active option, you will select one of the three load balancing
algorithms.
Round Robin The Sonicwall balances the outgoing
traffic on a per-destination basis by
examining source and destination IP
addresses.
Spill Over The Sonicwall balances the outgoing
traffic on a spillover basis when a
bandwidth maximum is reached on
the Primary WAN. You must specify
the maximum bandwidth to use on
the Primary WAN before traffic is sent via the Secondary WAN.
Percentage The Sonicwall balances the outgoing traffic on a percentage basis of the total
bandwidth available on the two WAN links. You must specify the percentage of
bandwidth for the Primary WAN link and the Sonicwall automatically allocates the
remaining percentage to the Secondary link.
1. From the GUI, select the type of Load Balancing that fits your customer’s needs.
2. For other than Round Robin, enter the appropriate bandwidth amount or spillover
percentage.
3. Don’t forget to click the Apply button at the top of the page!
NOTE – Before the load balancing is
complete, you must create a NAT
rule for the second WAN
interface.
4. From the GUI, select the Network
button and then the NAT Policies
option.
5. Click the ADD button.
6. For Original Source, select LAN
Subnets. We need to NAT any LAN
traffic outbound through the
Secondary WAN.
7. For Translated Source, select X2 IP.
NAT outbound traffic to the dynamic
PPPoE IP of the Secondary WAN.
8. For Original Destination, select ANY.
Any traffic destined for the Internet.
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