Configure L2 redundancy

dbssam

Hi everyone,
I have a network as following and want to set up redundancy on both firewalls and switches.
There two xg-7100 1u firewalls doing HA like the example in the manual, two Ubiquiti EdgeSwitch 24 connected with a trunk line SW1:1/SW2:1, and a server running Debian.

The blue lines are currently connected and the network works as expected without the redundancy.

I would like to know how to achieve the redundancy on firewalls and switches.

For the firewalls, i have read the post , i tried to set up like that but it not work, should i need to do some configuration on switches or missing other setup.?
For the Server, I design to create bonding on two interface, which mode should i use?

Please let me know if there is any information is missing.

Thanks all.

Derelict

https://www.netgate.com/docs/pfsense/book/highavailability/layer-2-redundancy.html

dbssam

I will try the setup in that page.
In addition, i have no idea whether my original setup is possible or not, may i have suggestion on it?
Thank you for your assistance.