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BKR
Explorer II
December 31, 2024
Question

SD-WAN Traffic Distribution Issue

  • December 31, 2024
  • 2 replies
  • 1101 views

Hello Community,

 

I have an issue with my SD-WAN configuration maybe, the traffic is being distributed unevenly between the two interfaces.

 

I tried all available options manual, best quality and lowest cost, non of these options distributed my traffic evenly.

 

You can find below the ports usage and configuration:

 

 

Screenshot 2024-12-31 091851.png

 

Screenshot 2024-12-31 092518.png

 

Screenshot 2024-12-31 092807.pngScreenshot 2024-12-31 092826.png

 

 

 

 

 

 

Screenshot 2024-12-31 093133.png

 

2 replies

BKR
BKRAuthor
Explorer II
December 31, 2024

Thank you chat-gpt.

kaman
Staff
Staff
December 31, 2024

Hi BKR,

Please refer to the below document on the difference between two load-balancing algorithms round-robin (default) and inbandwidth.

https://community.fortinet.com/t5/FortiGate/Technical-Tip-The-difference-between-the-load-balancing/ta-p/334392

You can also force the traffic for a specific source or destination to take specific WAN link with the help of Manual outgoing interface

https://community.fortinet.com/t5/FortiGate/Technical-Tip-Working-of-SD-WAN-rule-with-outgoing-interface/ta-p/192239

Please refer to the below document how sdwan best quality rule works:

https://docs.fortinet.com/document/fortigate/6.2.0/cookbook/22371/sd-wan-rules-best-quality

BKR
BKRAuthor
Explorer II
January 5, 2025

I check what you have sent me, but still the issue is occurring

While troubleshooting I realized that no route to port 3 available in the routing table, but also sometime all traffic go through port 3

 

Screenshot 2025-01-05 131249.png