netmwanFailoverLB

Network > Failover & Load Balancing

This chapter contains the following sections:

• Failover and Load Balancing
• Load Balancing Statistics
• Multiple WAN (MWAN)

Failover and Load Balancing

For Failover & Load Balancing (LB), up to four WAN members are supported:

• Primary WAN Ethernet Interface
• Alternate WAN #1
• Alternate WAN #2
• Alternate WAN #3

The Primary WAN Ethernet Interface has the same meaning as the previous firmware’s concept of “Primary WAN.” It is the highest ranked WAN interface in the LB group. The Alternate WAN #1 corresponds to “Secondary WAN,” it has a lower rank than the Primary WAN, but has a higher rank than the next two alternates. The others, Alternate WAN #2 and Alternate WAN #3, are new, with Alternate WAN #3 being the lowest ranked among the four WAN members of the LB group.

The Failover and Load Balancing settings are described below:

• Enable Load Balancing—This option must be enabled for the user to access the LB Groups and LB Statistics section of the Failover & Load Balancing configuration. If disabled, no options for Failover & Load Balancing are available to be configured.
• Respond to Probes—When enabled, the appliance can reply to probe request packets that arrive on any of the appliance’s interfaces.
• Any TCP-SYN to Port—This option is available when the Respond to Probes option is enabled. When selected, the appliance will only respond to TCP probe request packets having the same packet destination address TCP port number as the configured value.