Fortigate send LACPDU while lacp-mode passive?

Forum|Forum|1 year ago
June 1, 2025
2 replies
776 views

As far as I know, When lacp mode passive, it responds when it receives a lacp packet.

but during the LAG test, Forti-A was set to lacp-mode passive and Forti-B was set to lacp-mode passive.

Both Forti-A send lacpdu and Forti-B receive lacpdu.

Is it because there are still sessions we communicated when it was active-passive?

스크린샷 2025-06-01 200954.png 스크린샷 2025-06-01 201039.png

FortiGate

zoponko1

New Member

On the Fortigate, as the first device in my network from the ISP, I have configured 3 physical links as a 802.3ad aggregate. Then in addition I have configured LACP as active and fast, and algorithm as L4 (but also tried L3 as mentioned). And then I made 3 vlans that are all connected the the aggregate interface.