Multi-WAN

WAN failover and load balancing features provide efficient utilization of multiple WAN interfaces. Based on the configuration, this feature can be used to distribute traffic among the interfaces. The Multi-WAN feature provides the outbound WAN traffic, and load balancing over multiple WAN interfaces (WAN & USB) based on a numeric weight assignment. It also monitors each WAN connection using repeated ping tests and automatically routes outbound traffic to another WAN interface if connectivity is lost. The specific outbound traffic rules can also be configured because of 5-tuple of a connection. Outgoing network load-balancing is performed on a per IP connection basis; it is not channel-bonding, where a single connection uses multiple WAN connections simultaneously. The VLAN interfaces of WAN can also be configured for load balance or failover.

To configure the multi WAN settings, follow theses steps:

Procedure
    Step 1   Select WAN > Multi-WAN.
    Step 2   In the Interface Setting Table, configure the following:

    • Interface — WAN interface name to apply the load balance and failover configuration. Select and check the desired interface (WAN1, WAN2, USB1, or USB2).

    • Precedence (for Failover) — Enter the priority value for the interface to bring up another connection on another interface.

    • Weighted by Percentage or Weighted by Bandwidth (for Load-Balance) — Enter the weight percentage or value for each connection. The interface routes traffic to the secondary connection if the primary connection's is overloaded in an effort to balance the bandwidth load. To ensure full utilization of both connections, the ratio between the connections' load balancing weights should reflect the ratio between the connections' bandwidths.

    Step 3   Click Advanced Configuration and configure the following:
    1. Enable Network Service Detection — Check to allow the device to detect network connectivity by pinging specified devices and enter the settings as described here.

      • Retry Count — Number of times to ping a device. The range is 1 to 10 and the default is 3.

      • Retry Timeout — Number of seconds to wait between the pings. The range is 1 to 300 and the default is 5 seconds.

      • Detect Destination — Select Default Gateway or Remote Host — If choosing the remote host, enter the host.

    Step 4   Click Apply.
    Step 5   Enable Policy Based Routing — Check to enable.
    Step 6   Next, click Add or Edit and configure the following:
    Priority Enter a number for the priority.
    Source IP Enter the source IP address.
    Destination IP Enter the destination IP address.
    Services Select a service from the drop-down list. If a service is not listed, you can click Service Management to add it.
    Outgoing Interface Select the outgoing interface (WAN1, WAN2, USB1, or USB2) from the drop-down list.
    Failover to backup WAN Select On or Off from the Failover to back up WAN drop-down list.
    Note    If you select Off, the traffic is dropped when the binding interface goes off line or down.
    Status Select Enable or Disable to enable or disable the status of the policy.
    Step 7   You can also edit or delete a configuration by clicking Edit or Delete.
    Step 8   Click Apply.
    Note   

    Some service providers do not allow to ping the default gateway. Please choose a valid remote host to detect the network connectivity or simply disable the detection. Otherwise, the traffic will not be forwarded by the device.