Fortigate 201F : set up 2 port-channel (etherchannel level 2) on same Vlan

[vf]

Dear all,

i have a fortigate 201F version 7  on NAT mode. Fortigate is between core switches and top of rack switchs. I want to use 2 LACP links to interconnect Fortigate with core (uplink LACP) and  Tor switchs (downlink LACP). 2 Lacp must be trunked in order to carry many and same VLANS. 2 LACPs must be able to carry packets and communicate (switching L2  each other).

I try to set up this configuration but i meet some difficulties.

I create 2 aggregates interfaces. When i create Vlan (expect Level 2), i can't add these 2 aggregate interfaces. It just accepts one.

I try with Vlan Switch. With this type, you can't add aggregate interfaces, just physical interfaces.

So, do you know how i can achieve my network topolgy.

[nnair]

Dear Customer,

Kindly follow the below link:

https://community.fortinet.com/t5/FortiGate/Technical-Tip-LACP-support-for-entry-level-E-series/ta-p...

https://docs.fortinet.com/document/fortigate/6.2.0/new-features/226063/lacp-support-on-entry-level-e...

If still facing the issue, then I would suggest to open the ticket.

[vf]

My difficulty was to set up LACP ports carrying same and multiple vlans (trunking)  and switching Level 2 between them.

I succeed setting up aggregate interfaces.

I contact support who answers me it's not supported to add aggregate interfaces members on Vlan switch interface.

If i set multiple links on same switchs, it can bring some loops.

I don't know if there is a way to achieve my topology.

Best regards.