Quote from: Patrick M. Hausen on May 29, 2025, 07:57:00 PMOK, hash policy needs to match, LACP slow or fast interval needs to match. You probably need to explicitly set these on the OPNsense side.
Most common is L2+L3 hash.
Thanks for your answer.
l3-src-dst is the default hashing algo of the HP 6300M switch and therefore I configured OPNsense to use HASH Layers: L3 now
LACP rate is slow by default therefore I left Fast timeout disabled for the lagg
Unfortunately the network is still not working (I rebooted the Firewall after the changes)