Configuring a virtual tunnel group
Virtual tunnels enable reliable, site-to-site connectivity using Generic Routing Encapsulation (GRE) to tunnel traffic between pairs of FortiADC appliances. See
“Using virtual tunnels”.
The virtual tunnel group configuration sets the list of tunnel members, as well as load balancing options like algorithm and weight.
When you add members to a virtual tunnel configuration, you specify a local and remote IP address. These addresses are IP addresses assigned to a network interface on the local and remote FortiADC appliance.
Before you begin:
• You must have Read-Write permission for Link Load Balance settings.
After you have configured a virtual tunnel configuration object, you can select it in the link policy configuration.
To configure a virtual tunnel:
1. Go to Link Load Balance > Virtual Tunnel.
2. Click Add to display the configuration editor.
3. Complete the configuration and add members as described in
Table 25.
4. Save the configuration.
Table 25: Virtual tunnel configuration
Settings | Guidelines |
Method | • Weighted Round Robin—Dispatches packets to VT members using a weighted round-robin method. • Source-Destination Hash—Dispatches packets by source-destination IP address tuple. |
Add member |
Name | Unique name. No spaces or special characters. After you initially save the configuration, you cannot edit the name. |
Tunnel Local Address | IP address for the network interface this system uses to form a VPN tunnel with the remote system. |
Tunnel Remote Address | IP address that the remote FortiADC system uses to form a VPN tunnel with this system. |
Health Check | • Enable—Send probes to test whether the link is available. • Disable—Do not send probes to test the health of the link. |
Weight | Assigns relative preference among members—higher values are more preferred and are assigned connections more frequently. |
Status | • Enable—The member is considered available for new traffic. • Disable—The member is considered unavailable for new traffic. |