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Powerline conflict: AT&T BGW210 modem has "PowerLine" built in
Be aware that if you have an existing PowerLine setup and have to replace an older failed AT&T modem you may get a BGW210 from AT&T that already supports PowerLine.
AT&T technician came out to replace an older modem that failed. This older modem was connected to my 16 port switch. One of the ports was connected to the AV-200 powerline that fed five AV-200 one for each room that needed wired ethernet. As soon as he plugged the new modem in, those 5 rooms got internet connectivity. Neither he nor I were aware of that. After he verified the uVerse was working he re-connected the 16 port switch and we verified the devices on the switch were working. Within minutes after he left, the internet slowed down to where it was unusable. By disconnecting various systems I discovered that I could not use the AV-200 that was on the router as the "PowerLine" built into the modem was supplying ethernet to the 5 AV-200 already. There must be a feed back or loop back conflict as basically there were two "PowerLines" simultaniously trying to feed the five rooms that needed wired ethernet.
I have 2 questions:
1. The BGW210 is connected to a battery backup and does not plug directly into the wall. How is it that this powerline works? Other powerlines specifically state not to use a surge suppressor as they need to be connected directly. Maybe the battery backup side of the UPS does not include surge suppression????
2. The five rooms that still have AV200 (2 uBuntu, 1 Mac system and printers) can ping each other but not the devices on the 16 port switch. Vice-Versa for the devices on the 16 port switch. My windows 10 system can ping other devices but not the ones behind that PowerLine network. All devices are 192.168.1.x ie: no subnets. We did not have this problem when that AV-200 on the 12 port switch was used to feed the other locations. I mentioned "ping" but the real problem is I cannot print to the ones behind the AV-200. Windows 10 shows the correct IP address, but the printer is always off lines.
1 Reply
I cannot edit my original post so I did a reply
There is no builtin PowerLine in that AT&T modem, I was mistaken. Here is the real cause of the conflict:
The BGW210 connects to a VEN501 AT&T wireless access point "WAP" that connects to the CISCO TV adapters provided by AT&T. Those CISCO adapters are in each room that has a TV. Each of those CISCSO adapter has a single ethernet port that can provide internet access and is not just dedicated to providing uVerse TV. I connected that port into a 5 port switch that had a linux system, printer and a Samsung TV. I then connected the 5th port to the wall using the AV-200 as I thought I needed to get ethernet. I did not know the CISCO provided internet that it obtained from the VEN501 WAP.
My solution to fix the printer access is to remove the CISCO ethernet wire from the 5 port switch and put the AV-200 back onto the 16 port switch that is fed by the AT&T modem. That way all the AV200s are fed by a single one that is on the 16 port switch.
