I have a N100 fanless box set up with Opnsense installed, connected to an Arris SB8200 modem. I have LAGG enabled on both the modem, and as the WAN interface in Opnsense, both cables connected. This works fine during the week, I am able to pull 1200Mbps on a gigabit plan. However, every week on Sunday, without fail, the connection will reset, or is lost, and Opnsense will default to the management port on the modem (192.168.100.1) for internet, which causes me to lose internet access. Even when connection is restored, it won't switch to the appropriate address.
Is there a way to prevent Opnsense from failing over to the management port? Is this a lost cause?
Try "Reject Leases From" in the DHCP client configuration, quote:
"If there are certain upstream DHCP servers that should be ignored, place the comma separated list of IP addresses of the DHCP servers to be ignored here. This is useful for rejecting leases from cable modems that offer private IPs when they lose upstream sync."
Cheers
Maurice
Thank you! I set it to ignore the management port IP, hoping this works.
G