ARUBA VSF AND FORTIGATE ACTIVE-ACTIVE HA LACP ISSUE

[MaxH]

Hello,
I'm stuck on one issue i saw since i've deployed the new instance Aruba and Fortigate on my site
My LAG between Stack 6200M Aruba Switch ( 2 x 2 ports 1GBS) and my FORTIGATE ( ACTIVE-ACTIVE )
works but there is an LACP issue - there Always 2 of 4 link LACP bloqued-see bellow :

each physical switch should have 2GBS LAG interface normally but here not..could you please help?

[ede_pfau]

You should use 2 aggregate links between FGT and switch cluster, one per FGT. You'll see w different LAG IDs then. There was a KB article about this some time ago:

Technical-Tip-FortiGate-HA-A-P-Active-Passive-cluster-connected/ta-p/194655 

Technical-Tip-LACP-behavior-in-an-HA-cluster/ta-p/195163 

I think it's mentioned in the Admin Guide as well.

Nice that you employ 2 HA links for redundancy. For stability, put some more weight on one link than the other (like, 60:40).

Why do you use A-A mode? Usually A-P is used for stability. (You wouldn't have noticed the link issue then). A-A mode is usually used if more processing power is needed than a single FGT will supply.