9. Use the WAN Redundancy page to determine how the two ISP links are used.
• Weighted Load Balancing: Choose this option if you want to use both ISP links simultaneously. Load Balancing distributes the bandwidth to two WAN ports by the weighted percentage or by the weighted link bandwidth. The two links will carry data for the protocols that are bound to them.
– Weighted by percentage: If you choose this option, specify the percentage for each WAN, such as 80% percentage bandwidth for WAN1 and least 20% percentage bandwidth for WAN2.
– Weighted by Link Bandwidth: If you choose this option, specify the amount of bandwidth for each WAN, such as 80 Mbps for WAN1 and 20 Mbps for WAN2, which indicates that 80% bandwidth is distributed to WAN1 and at least 20% bandwidth is distributed to WAN2.
NOTE: The Weighted by Link Bandwidth option has the same effect with the Weighted by Percentage option. It just provides more percentage options than Weighted by Percentage that only provides three percentage options.
• Failover: Choose this option if you want to use one ISP link as a backup. The Failover mode directs all Internet traffic to the secondary link if the primary link is down. When the primary link regains connectivity, all Internet traffic is directed to the primary link and the secondary link becomes idle.
– Select WAN Precedence: Choose one of the following options:
Primary: WAN1; Secondary: WAN2: If you choose this option, WAN1 is set as the primary link and WAN2 is set as the backup link.
Primary: WAN2; Secondary: WAN1: If you choose this option, WAN2 is set as the primary link and WAN1 is set as the backup link.
– Preempt Delay Timer: Enter the time in seconds that the security appliance will preempt the primary link from the backup link after the primary link is up again. The default is 5 seconds.