Thanks for the reply, @KJK. To be clear, I don’t want to combine the copper link with the fiber links, and I’m aware that two fiber links already offer redundancy. I just want to use the copper link...

I’ve got two 10 GbE fiber links and one 1 GbE Cat6 link between switch A (TL-SG3428XMP 3.0, 3.0.2 Build 20221130 Rel.57838) and switch B (TL-SG3210XHP-M2 2.0, firmware firmware 2.0.0 Build 20220322...