Considerations for Multi-Link system communication

If a remotely managed Firewall has Multi-Link, we recommend adding a primary and a secondary control interface for different ISP connections. Adding a control interface for each ISP connection guarantees connectivity if one of the ISP connections fails.

Make sure that you configure these addresses consistently in the following parts of the configuration:

For the interface address on the Firewall.
For the external contact addresses (if applicable).
In the NAT rules of the Firewall that protects the Security Management Center (SMC) servers (as necessary).

If there is a Multi-Link connection between a Management Server or Log Server and the components that contact them, define a contact address for each network connection. Make sure that your NAT rules translate from each external address to the correct internal address of the SMC server.