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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...
I get the LM1200 fitful 20 to 90 second reconnects in fail over with Verizon like everyone else.
But:
In 'Mobile Broadband only' the LM1200 works fine. With a half dozen hosts. Rock steady. But not if it failed over to Mobile Broadband:
Pull Wired Broadband WAN cable and LM1200 fails over to cellular.
LM1200 loses both Internet and LAN links several times doing so. (Reconnects.)
LM1200 then loses Internet and LAN links every 20 to 90 seconds. (Reconnects.)
No devices like VoIP adapters may register. (No time to do so.)
Browsing is next to impossible. (Once again time but if done quickly possible.)
Turn ‘Keepalive‘ off it reconnects.
Set connection to ‘Mobile Broadband Only’ it still reconnects.
Plug Wired Broadband WAN cable back in and Mobile Broadband starts
working fine!
With the Wired Broadband up and available!
Turn ‘Keepalive’ back on and after a couple link bobbles Mobile Broadband
works fine!
With the Wired Broadband up and available!
Through 'Keepalive' pings!
Select auto and LM1200 switches to wired fine.
Pull Wired Broadband WAN cable and the above starts again.
Work with me guys. There is a way to fix this I believe.
ilektranik
Or more succinctly:
Fail Wired Broadband by pulling cable.
When in Verizon Mobile Broadband repeated reset mode after failover:
Settings > Advanced > Failover > Mobile Broadband Only > Submit
Settings > General > Software and Reset > Restart > OK
Mobile Broadband now works continuously for multiple hosts after boot:
Wired Broadband still connected. Lights on LM1200 all green.
Tested for 1 hour on multiple devices. All good.
Then:
Settings > Advanced > Failover > Auto > Submit
Swaps to Wired Broadband pretty as you please.
How is this Verizon?
ilektranik
Instead of " Wired Broadband still connected." in above it should read "Reconnect Wired Broadband."
It seems this is not a multiple device on Verizon issue or any other Verizon issue. This is an LM1200 Firmware issue.
You lose not only Internet connectivity but LAN connectivity to the LM1200. Verizon cannot do that. The LM1200 can.
Not giving up yet.
ilektranik
Well the Verizon conspiracy and default settings kinda sidetracked me. But, I got the LM1200 working well:
Login to LM1200
Settings > LAN > Operation Modes > Router
Settings > LAN > DHCP Server > Disabled
IP Address > 192.168.5.1/24 > Submit
(Default but use whatever non-routable IP address you wish.)
Settings > Software and Reset > Restart > OK
Login to your router
WAN IP Address set to Static
WAN IP Address set to same subnet as LM1200
Reboot
Fast, smooth, reliable failover and fallback. Nairy a bobble.
Good deal and Good Night.
ilektranik
This actually worked for me, thanks for this.
- Turn off DHCP on the LM1200 in router mode and let your home router handle DHCP for your LAN
- Use the LM1200 IP as your default route on the home router
- LM1200 LAN port -> "WAN" port on home router