I had a faulty HDD on my OPNSense device a few weeks ago that was reporting many errors. I did a config backup, then replaced the faulty drive and reinstalled opnsense and restored the old config. This was on the 25.x firmware just before 26.1 was released.
I then started to have regular IPV6 WAN problems where it seems the DHCP lease isn't being renewed at the ISP side, so IPv6 WAN goes down.
Software reboot doesn't fix it, in fact it doesn't get any IP4 or 6 address after a soft reboot. The only (temporary) fix is a hard power cycle.
I've tried swapping the WAN port to a different NIC but no difference is seen.
I upgraded to 26.1 with no errors, however the IPv6 drops still occur.
I'm wondering if the config is somehow corrupt from the HDD errors, but if so why would it work for days and then fail?
Does anyone have any suggestions please.