So i am going to re-ip some devices in my network and am looking to make a proper OOB network. For things lke iDrac, ipmi, ups interface, and thinking about the proxmox interface as well.

on my L3 switch ill create the access list for certain machines on my network to gain access to that subnet and nothing else. but then i was thinking about it. if i do that then they will not have any internet access either. which is fine and what i ultimately want. but then how do you manage BIOS, firmware, and any general updates etc?

how are you guys/gals setting up the oob? are you even using one?