VLAN and or DHCP Failing on single vlans after several days

[xaxero]

I am experiencing a problem on several installations where the DHCP server stops sending out DHCP addresses and if we manually address we still cannot ping the router. It is as if the Interface has suddenly started blocking all traffic on that VLAN.

We started experiencing this after upgrading ZenArmor mid November. I am not sure it is definitely a ZenArmor issue or something else. Nothing in the logs to indicate any issues.

[xaxero]

I have to add that rebooting the router immediately fixes the problem

[thedual5s]

I am having the exact same issue on my home setup. It started happening after I did updates to my Opnsense, about 3 days ago. I hadn't done updates in awhile, maybe a month or two. Can't seem to pinpoint the exact cause but its definitely something to do with the DHCP as its dropping and not renewing leases. Rebooting the Opnsense box fixes it for a short period of time. I've removed Opnsense from my network until I figure it out. Any solutions are much appreciated.

I'm not using ZenArmor....

[EdwinKM]

I have to add that rebooting the router immediately fixes the problem

Maybe first start with restarting only the dhcp service (dhcpd) on the "lobby".
Also, did you verify the logging? (https://192.168.1.1/ui/diagnostics/log/core/dhcpd)