On some models you can combine two or more physical interfaces to provide link redundancy. This feature enables you to connect to two or more switches to ensure connectivity in the event one physical interface or the equipment on that interface fails.
In a redundant interface, traffic is only going over one interface at any time. This differs from an aggregated interface where traffic is going over all interfaces for distribution of increased bandwidth. This difference means redundant interfaces can have more robust configurations with fewer possible points of failure. This is important in a fully-meshed HA configuration.
An interface is available to be in a redundant interface if:
- it is a physical interface, not a VLAN interface
- it is not already part of an aggregated or redundant interface
- it is in the same VDOM as the redundant interface
- it has no defined IP address
- is not configured for DHCP or PPPoE
- it has no DHCP server or relay configured on it
- it does not have any VLAN subinterfaces
- it is not referenced in any security policy, VIP, or multicast policy
- it is not monitored by HA
- it is not one of the FortiGate-5000 series backplane interfaces
When an interface is included in a redundant interface, it is not listed on the System > Network > Interface page. You cannot configure the interface individually and it is not available for inclusion in security policies, VIPs, or routing.
Having trouble configuring your Fortinet hardware or have some questions you need answered? Ask your questions in the comments below!!! Want someone else to deal with it for you? Get some consulting from Fortinet GURU!
Don't Forget To Buy Your Fortinet Hardware From The Fortinet GURU