SD-WAN
FortiExtender supports Software-Defined Wide Area Network (SD-WAN) to provide link load-balancing (LLB) among different links. It provides the following features:
- Virtual interface in the system for routing system and firewall.
- Adding targets as members and balancing traffic among them.
- Link load-balancing (LLB) for WAN interfaces or VPN tunnels.
- LTE interfaces as members of SD-WAN, or combined with a physical interface as members of SD-WAN.
- Support for multiple LLB algorithms:
- Redundant
- Weighted Round Robin (WRR)
- Redundant algorithm using an SD-WAN member for data transmission based on:
- Priority
- Cost
- Two LTE interfaces as members of a redundant SD-WAN by cost algorithm:
- The lowest cost target works as the primary. When the primary fails, the next lowest cost target will take over the primary role (fail-over).
- When the dead primary comes back to life, it will retake the primary role (fail-back).
- The cost of LTE interface is calculated based on the capacity and monthly-fee of the LTE plan.
- When the LTE and physical interface(s) are members of SD-WAN redundant by cost algorithm:
- The physical interface must always be selected as the lowest cost target and works as the primary.
This section covers the following topics: