HDMI has been used for stacking ports for years... I think it's gone out of fashion, though. https://www.dell.com/support/kbdoc/en-us/000120108/how-to-stack-del

HDMI has been used for stacking ports for years... I think it's gone out of fashion, though. https://www.dell.com/support/kbdoc/en-us/000120108/how-to-stack-dell-networking-powerconnect-5500-model-switches https://www.dell.com/support/kbdoc/en-us/000120108/how-to-st...