OPNsense 26.1.11_5

[MoonbeamFrame]

Since upgrading to 26.1.11_5 (I don't think this behavior occurred with 26.1.11/26.1.11_3) my Realtek RTL8125 port was exhibiting an odd behavior.

My management LAN disappeared in the early hours of Friday. From another LAN I could see the firewall, but nothing else on the management network. In the Kea logs re0 was reported as not running and so was not servicing DHCP renewals.

2026-07-04T00:04:55
Warning kea-dhcp4 WARN [kea-dhcp4.dhcpsrv.0x4fe545a5c008] DHCPSRV_OPEN_SOCKET_FAIL failed to open socket: the interface re0 is not running

Initially rebooted and the management LAN was running again.

The management LAN went down again around 18:00. This time I disabled/enabled the interface.

Just before midnight and the management LAN went down again. This time I've moved it to another device [Intel I226-V].

Now into Saturday morning and the management LAN has disappeared again. So it looks less likely to be a NIC issue. I think the DHCP renewal process is failing as a consequence of whatever the trigger is for this behavior.

I could do with some pointers on where to look to get useful debugging information, and for completeness the only other activity on this firewall was on Thursday night I did the Outbound to SNAT migration.

Thanks

[mlysek]

Hi,
I am also seeing something strange on the network I have connected to a Realtek interface on 26.1.11_6. That port is used for my guest vlans and  admin vlan for two guest AP. Everything works fine after a reboot. But when i unplug the network cable on that interface for a moment, then plug it back in, that network goes down and does not come back up without a reboot.

I can't say for certain when this behavior began. Is there a setting for that adapter that changed?

Thanks
-M

[meyergru]

Do you guys use os-realtek-re or the native FreeBSD driver? You know that Realtek adapters are buggy under FreeBSD, don't you?

[mlysek]

I have the os-realtek-re installed. Nothing shows up in the log files when that network goes down.

Thanks for your help,
-M