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Agent_1994
Contributor

SD-WAN on 5.6.4: very unbalanced traffic

Hello Forum,  We're having a problem at a customer's site. They have 3 wan links in a volume-based SD-WAN interface on a FortiGate 101E (5.6.4). Their weights are: wan1: 50 wan2: 50 port1 (aka wan3): 0  We're not using the third wan link yet.  I've configured a status check that pings 8.8.8.8 with default values.  What are the objectives?

[ul]
  • traffic with a destination to the interbanking block goes through wan2.
  • traffic from the proxy server will be balanced among wan1 and wan2.
  • traffic from other sources will go through wan2.[/ul]

    What's happening?  Tough the proxy server generates almost all the traffic, almost everything seems to go only through wan2 (wan1: 1.9gb, wan2: 299.6 gb).  I have a suspect, since 5.6.4 there's a "Quality criteria" option, whose possible values are: Latency, Jitter and Packet Loss (I haven't found much documentation about this). I know that wan2 is better than wan2, but I want traffic to be distributed evenly anyway.  Any hints?  Thanks in advance.

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    Agent_1994
    Contributor

    I forgot to add this, FWIW:

     config system virtual-wan-link     set status enable     set load-balance-mode measured-volume-based     config members         edit 1             set interface "wan1"             set gateway x.x.x.1             set volume-ratio 50         next         edit 2             set interface "wan2"             set gateway y.y.y.33             set volume-ratio 50         next         edit 3             set interface "port1"             set gateway z.z.z.1         next     end     config health-check         edit "google"             set server "8.8.8.8"         next     end     config service         edit 1             set name "interbanking via wan2"             set member 2             set dst "interbanking"             set src "all"         next         edit 2             set name "proxy"             set mode auto             set quality-link 1             set dst "all"             set src "proxy"             set health-check "google"         next         edit 3             set name "default"             set member 2             set dst "all"             set src "all"         next     end end

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