July 26, 2014
I have the DVR-LT 4120MHD. The DVR is connected to the AT&T Motorola NVG589 gateway. Yesterday the the DVR was not visible on my network. After calling Jeff, we figured out the port on the back of he ATT gateway was no working. I changed the DVR to another port and the DVR was again visible on my network and working as expected. But now I have a new issue. When I plug the DVR into the working ATT Gateway ports, it may take 1 minute, or a few hours, but the DVR knock out my UVERSE service, both TV and Internet service. I can unplug the DVR and my Uverse services begin working again. Could this be a bad network card on my DVR? Maybe the previous port stopped working because the DVR shorted it out? Any help would be greatly appreciated.
Everything was working perfect when we left it. Remote access worked. If the network card is bad, it does not work at all. What Heath suggests is a good possibility. You could have an IP conflict, or another configuration issue that needs to be examined.
Make sure the IP address of the DVR is not the same as the Gateway.
IP of Gateway example = 192.168.1.1
IP of DVR example = 192.168.1.108
If you put one of the wrong numbers in the DVR, it will knock off your internet due to an IP conflict.
July 26, 2014
The only reason I was suspecting the DVR's network card is because the ATT gateway port that it was using no longer works. I had to switch ports. Once I switched ports, the issues with Uverse service began. Last night I turned off DHCP on the DVR. I also turned off other services on the DVR that after reading the DVR manual I felt were unnecessary. ATT is sending a new gateway since the old gateway port is bad.
The ATT Gateway IP address is different than the DVR. In the list of devices (found by logging into the Gateway) I cannot find any device with the same IP address.
Last night about 8 I made the changes mentioned above to the DVR then powered it down completely. After powering it back up and being connected to the gateway, it have been working normally. Uverse service and DVR services are working. Maybe it was the DHCP being turned on? Maybe some of the other services being turned on?
Lastly do all ports need to be excepted from the firewall or is there one port only that needs to have an exception in the firewall?
Hopefully it it continues to work, not sure why it worked for so long and then all of a sudden stopped....