Virtual WAN link, load balance, and failover/failback

The get VWAN status returns an empty output

1. Virtual VWAN only functions when FortiExtender operates in NAT mode. Check the network mode in get extender status to confirm that NAT mode is configured.

2. Check configurations under system virtual-wan interface to see if the type, members, and status are correctly configured

3. Check configurations under system vwan-member to see if the target and health check event is correctly linked.

No link load balance is seen in the virtual WAN interface

1. While running traffic, use the command get vwan status to check the link data usage. Issue the command several times to see the increments of incoming and outgoing data. An active member is expected to be seen with an increasing amount of incoming and outgoing packets.

2. Check the member's health status with the command get hmon hchk <instance> to see if all members are alive.

3. Check that related firewall and routing policies allow the virtual wan interface to pass and steer traffic.

   Example firewall and routing policy configuration:

   config firewall policy
       edit vwan_permit_out
           set srcintf any
           set dstintf vwan1
           set srcaddr lan
           set dstaddr all
           set action accept
           set status enable
           set service ALL
           set nat disable
       next
       edit vw_mb1_nat
           set srcintf any
           set dstintf wan
           set srcaddr lan
           set dstaddr all
           set action accept
           set status enable
           set service ALL
           set nat enable
       next
       edit vw_mb2_nat
           set srcintf any
           set dstintf lte1
           set srcaddr lan
           set dstaddr all
           set action accept
           set status enable
           set service ALL
           set nat enable
       next
   end
   config router policy
       edit to_vwan
           set input-device 
           set srcaddr lan
           set dstaddr all
           set service ALL
           set target target.vwan1
           set status enable
           set comment 
       next
   end