WAN interface drops connection
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Hoping someone here can point me in the right direction here...
My setup is cable modem (XB7) in bridge mode to SG-5100 on pfSense 21.02-p1.
Every night, usually around 3 am (but varies), the pfSense box loses its internet connectivity. I suspect that the ISP is updating the cable modem around that time and there is a reboot of the modem, following which the WAN interface of the SG-5100 is not picking up connectivity.
It appears that the only way to restore the internet connection is for me to reboot pfSense. However, during this time, the SG-5100 is not reachable from my internal network, so I have to manually power down using the hardware button, then reboot manually.
How can I troubleshoot the problem here?
I think might be related: when I manually released and renewed the WAN (Status --> Interfaces), I experienced the same loss of connectivity until I rebooted.
Another data point: under Status --> Gateways, my IPV4 gateway is listed as online, but the IPV6 gateway is always listed as pending. However, the SG-5100 does have an IPV6 address on the WAN interface.
Hoping someone can help with this!
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I was able to solve the gateway being listed as pending by adding an IPv6 gateway monitoring address (I used Google). But no progress on the other issue. Does anyone have any insight?