lacp on 148poe configuration with proxmox

[mark8263]

Hello.

I'm moving away from a HP switch (no cli access) and a Sonicwall firewall to the Fortigate side.

I have a 91G and 2x148fpoe switches connected.  They are currently configured in Fortiilink and managed so all ports are being managed from the 91G.

I have 2 Proxmox servers that I will be moving over to the new environment and am trying to understand how LACP/LAG works on the Fortigate.  It seems similar with Active/passive mode and 'bonding' 2/or more interfaces into the same LAG group so traffic can travel across both if/when needed. 

I'm trying to understand, and it seems like I would do the following:

1. Open the fortiswitch ports tab

2. Choose Trunk ports

3. Give it a name and add ports either from the same switch, or specific ports on different switches.

4. Set the mode to 'active' and hit 'ok'.

If I'm thinking correctly then this would set up, say port 1 on sw1 with port2 on sw2, in a LAG/LACP group as active.  Correct?

Is that all there is to it, since the 91G is managing both switches? Is my 'choice' of using a port on 2 different switches a good idea?

Then, if I have my Proxmox box set correctly - all should work.

thanks in advance.

mark

[AEK]

Hi Mark

FS-148 can't do that. You can only select 2 ports from one single switch.

Other higher models that support MC-LAG can do LACP from different chassis.

[mark8263]

Thanks for the clarification. I'd originally looked at the 448 model but decided to get the 148 switches instead. I must have lost that fact, in translation.  I'd also presumed since I have the switches connected together in the ISL config, that I could also do LACP between 2 different switches.

[AEK]

Check the FSW feature matrix to see which models support it.

Go to "MCLAG (multichassis link aggregation group)" page 7.

https://docs.fortinet.com/document/fortiswitch/7.6.5/fortiswitchos-feature-matrix

Hope it helps.