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Forum Discussion
LM1200 repeatedly dropping link
I recently purchased an LM1200-100NAS to serve as an LTE failover connection for my homelab and noticed a strange issue while setting up my pfSense-based router to use the LM1200 as a secondary WAN c...
Also on the verizon network here. Can anyone confirm any previous version of firmware this rebooting issue was not present on with verizon? I would be happy to try a downgrade at this point until a fix is finally distributed.
Chris
I don't remember this coming up in this thread before since I believe we've all been trying to get the LM1200 to work in bridge mode between our routers and verizon. While testing some other things, I discovered that the exact same behavior happens when I run the LM1200 in router mode and remove my router.
Testing went as follows:
The LM1200 is in router mode on a 5-port switch
4 computers are also on the switch
All computers can ping the LM1200 successfully
When LM1200 connects to verizon, one computer can access internet web pages, but the very moment a second computer tries to access an internet page, the cell connection drops.
This surely has to be something verizon is doing to prevent multiple devices from using their service - maybe something like trying to prevent people from using their phone as a hotspot without paying for hotspot service. It looks like we're only getting by in router mode behind a router because the router is the only device verizon can detect using the connection.
Agreed to all points above, and excellent sleuthing (we're all saying the same thing), but would like to see JohnPeng follow up on the TTL idea that labellama raised.
I know that in the mobile hotspot world, many people get around hotspot data limits by playing with TTL settings (making it appear as a tablet or phone for example). It makes sense that maybe Verizon is treating our LM1200's as USB Modems, and not hotspots to your point.
labellama your last post seemed to indicate that setting TTL out of the router to 64 seems to work? Most mobile phones use 65. Is there a specific # (vs +1 on egress) that may work? Then each of us at least know a workaround: get into your routers and reset TTL to 65, for example.
A little disappointed that Netgear is not more proactive in testing this TTL direction: and then being more creative in working around this -- such as providing an advanced setting TTL override in the LM1200.
My guess is that our routers present a different TTL for each client device (ie 128 on windows), which trips the failsafe at Verizon. If the TTL were more stationary out of the LM1200, perhaps it would appear as any other computer/client directly connected to the modem.
So is there a way to change the TTL within the LM1200?
- There is no fix. I spent wasted a considerable amount of time any money purchasing a Verizon plan going over all the forums and help. I ended up returning the unit and canceling my hotspot plan.