Click the Exhibit button.
You have two data centers a FortiGate 7000-series chassis connected by VPN, and all traffic flows over an established generic routing encapsulation (GRE) tunnel between them. You are troubleshooting traffic that is traversing between Server VLAN A and Server VLAN B.
The performance is lower than expected and all traffic is only on the FPM module in slot 3.

Referring to the exhibit, which action will correct the problem?