Removing interface - best practice?
I had to move my 10Gb interface to pfSense because of some renovation had to be done and I only could use one cable.
Anyway, I had this happening to me before, that when I remove one interface, even if I had done everything I could in the GUI, like removed dhcp and deleted the Interface Assignment, afterwards pfSense will loose almost all other assignments and I had to do everything from scratch.
So what is best practice for removing one interface?
Hmm, that absolutely shouldn't happen.
As long as the assigned interfaces in the config are still present at boot pfSense should not care about other interfaces that may or may not exist on the firewall.
Commonly an interface may be removed that changes the ordering of other interfaces, if they are all igb NICs for example.
If you don't have any other 10G NICs in the system and have unassigned it I would not expect an issue.