opnsense 2.72 independently switched wan set up on igb1 to igb0, killing system.

[johnk]

pc has on board em0 with pcie 4 port igb0-3. set up with igb0 as lan 10.101.0.1 and igb1 as wan. no change prevention on either. these are only ports with assignment and ip addresses. i wanted some protection before finishing interface configs. have dnssec on (cloudflare). Installed Unbound Blacklist about a6 categories. All fine. Started Unbound DoT and entered 4 Cloudflare IP's. Hit save and message: - ip not found in arp table.

em0 became wan (activated too) with no ip info and igb1 was deactivated. Board has no UEFI and tested well with em0 turned off. Also had 2 2port igb0.

would fully assigning rj46's along with ip's, change prevention, etc. prevent this. 

[axsdenied]

This should never occur unless you specifically made a change or forgot to "apply" changes after saving.  I've run OPNsense on multiple different types of hardware; one similar to what you're on now, and have NEVER had this issue.

Even *IF* your interface had an issue, OPNsense won't auto-switch interfaces.   Youd' have to go to console to change.

[damage69]

I can't give details as to how it happened, but I can say that my system (v 22.7) which has LAGG for LAN and WAN "switched" to igb0 and igb1. Only happened once in versions over the last few years. I rebuilt with a clean install and seems OK so far.