Configure the Routing Table Multi-WAN Method

Before You Begin

Routing Table Mode and Load Balancing  

If you have multiple active external interfaces, the Firebox has multiple default routes to the external network with the same cost (one hop). With the Routing Table method, Fireware puts all the active external interfaces into one ECMP group. It uses the ECMP algorithm to decide which next-hop (path) to use to send each packet. This algorithm does not consider current byte count through the external interfaces.

With the Routing Table method, the Firebox first looks at policy-based routing actions in your policies, and the routes in its internal route table to see if it should send a packet through a specific external interface. If the Firebox does not find a specified route, it selects a route based on the ECMP (equal-cost multi-path) algorithm specified in RFC 2992.

Configure the Interfaces

  1. Select Network > Multi-WAN.
  2. In the Multi-WAN Mode drop-down list, select Routing Table.

Multi-WAN configuration, Routing Table

  1. To add interfaces to the multi-WAN configuration, select an interface and click Action > Join Multi-WAN.
  2. To complete your configuration, you must add link monitor information as described in Configure Link Monitor.

For information on advanced multi-WAN configuration options, go to Advanced Multi-WAN Settings.

  1. Select Network > Configuration.
    The Network Configuration dialog box appears.
  2. Click the Multi-WAN tab.
  3. In the Multi-WAN Configuration section drop-down list, select Routing table.
    By default, all external interface IP addresses are included in the configuration.

Network Configuration - Multi-WAN tab, Routing Table method selected

  1. To remove external interfaces from the multi-WAN configuration, click Configure and clear the check box adjacent to the external interface you want to exclude from the multi-WAN configuration.
    You can have as few as one external interface included in your configuration. This is useful if you want to use SD-WAN routing for specific traffic and keep only one WAN for default traffic.
  2. To complete your configuration, you must add link monitor information as described in Configure Link Monitor.

For information on advanced multi-WAN configuration options, go to Advanced Multi-WAN Settings.

Related Topics

Read the Firebox Route Tables