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Forum Discussion

PeterG5000's avatar
PeterG5000
Tutor
Sep 21, 2021

LM1200 connected to Unifi Dream Machine Pro (UDMP) LAN link goes out shortly after plugging in.

Hello,

 

I purchased the LM1200 LTE Modem to act as my backup Internet for my Unifi Dream Machine Pro.

 

When I connect to the UDMP the lan light on the LM1200 turns green and after a few seconds immediately goes out.  I never get any kind of connection to the Internet.

 

When I connect my LM1200 to my computer it works fine.

 

What is going on!  I updated the firmware.   This is WASTING A LOT OF MY TIME!

 

Can someone at NETGEAR please help me with this.

 

Thank You,

 

-Pete

Firmware
Installation
Troubleshooting

5 Replies

  • JinTu's avatar
    JinTu
    Star
    Sep 21, 2021

    Have a look at the thread here. Another user recently reported the same behavior with the UDMP, and I am having a similar issue when using a Unifi switch to connect with the LM1200.

      • JinTu's avatar
        JinTu
        Star
        Sep 22, 2021

        Not likely Unifi as I have never observed this behavior with any other vendor's devices. It's almost as though the LM1200 is receiving something from the Unifi hardware it doesn't like after it connects for a breif moment in time. One of the tests I did involved disabling my router's interface on the VLAN that the LM1200 was on, and this seemed to allow the LM1200 to connect to the Internet. As soon as I re-enabled the router's interface that communicates with the LM1200, it was able to DHCP and connect. This suggested that the router was doing something that the LM1200 didn't like such as receiving traffic from my router as a previously issued DHCP lease address. I was suspecting it had something to do with something DHCP client timing related, but haven't found a combination of settings that causes the LM1200 to behave any differently.