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Forum Discussion
Netgear LM1200 failover
So I was reading a few forum topics re: the LM1200 and it's failover functionality and I wasn't able to resolve the issue I am having.
I am on Netgear LM1200 firmware version EC25AFFDR07A09M4G, app version NTG9X07C_20.06.09.00.
The Netgear Orbi firmware is V6.0.3.85_3.1.15
The LM1200 is set to "bridge mode", and the Netgear Orbi router is set to automatic DHCP for the 10Gbps WAN port.
Automatic failover is enabled.
Connection keep alive is set to ping 8.8.8.8 every minute.
Here's scenario one, when the cable modem is unplugged, and the LM1200 grabs the WAN from AT&T
Here is scenario two, with the cable modem plugged in:
And here's scenario three, where I just plug my laptop directly into the LAN port of the LM1200, with the cable modem connected and Internet up:
Any ideas?
3 Replies
Troubleshooting attempted:
- Rebooted LM1200 with cable modem connected to WAN port on LM1200, Orbi router connected to LM1200 LAN port
- Rebooted Orbi router (with same cables connected as above)
- Rebooted Cable modem (with same cables connected as above)
- Rebooted everything (with same cables connected as above)
Did you ever get a solution?
It looks like the issue is with the LM1200 not properly failing over when both WAN sources are available. In scenario one, the failover works correctly when the cable modem is unplugged. However, in scenario two, with the cable modem plugged in, the LM1200 doesn’t switch to cellular as expected, possibly because it still sees the cable modem as "up" even if there’s no actual internet. When testing directly with your laptop (scenario three), it confirms the LM1200 is still passing through the upstream modem without checking true internet availability. One fix could be to ensure the Orbi router is detecting actual internet access before sticking to a WAN source, or manually disable the main WAN if it’s down. Unfortunately, the LM1200’s failover isn’t always smart enough to detect loss of internet, only physical disconnection. You might try setting the LM1200 to monitor a more reliable host or reduce the ping interval, but ultimately this sounds like a limitation in the LM1200's failover logic.
