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Orbi RBR20 issues with Arris TG1682G Modem/Router for Xfinity.
Alright, yet another XFiniti issue post! Like many, I am having issues getting my mother's RBR20 to connect to the internet with the Xfinity Arris TG1682G Modem/Router. I have enabled Bridge mode...
Please make sure of the following
1. The Orbi "Internet/Yellow Port" is connected by ethernet cable to Arris TG1682G.
2. No other devices are connected to Arris TG1682G ethernet ports.
3. Arris TG1682G is in bridge Mode.
4. The Orbi is in router mode and setup to obtain WAN DHCP automatically.
5. Power off both devices. Power on Arris TG1682G first and wait until LEDs show active and Internet. The power on the Orbi.
Comcast/Xfinity like most ISPs only assigns an account 2 public IP addresses and only one can be assigned to a device connected to the ethernet ports. So if you have multiple devices connected to the Arris TG1682G they may be racing for that 1 public IP address.
charleyp1 wrote:On one the various threads on this subject, I read someone suggested that. When I do not add it, I do not have an IP address from Comcast. When I do, I get an IP address pushed down to the Orbi (though I still cannot access the internet).
Go back and check your Arris settings. The modem needs to be active and the LAN portion technically disabled. Make sure, after changing settings on the Arris, and before connecting the Orbi, you reboot the Arris. This way the Arris will obtain the info from the ISP and assign an IP address to the Orbi router.
Trust me, I have. I spent 3 1/2 hours yesterday troubleshooting this. The only setting change I am aware of that needs to be made is enabling bridge mode. If there is another setting change to be made, no one has discovered and posted about it, as far as I can tell. I scoured every possible setting that can be changed in the Arris TG1682G and there is no way for a home user to, say, disable the wireless transmitters short of enabling bridge mode. If anyone has any suggestions on what else can be fiddled with in the modem, I'd love to hear them.
Check the Arris modems users manual for transparent, or NAT or Bridge mode features on the modems web page. I have set a few of these modems up for bridge mode and it's there. Been a while since I did my last one. Once it's bridged fully and you applied the change. Your RBR router should be connected to the 1st port on the modem. Power OFF The modem for 1 minute then back ON and let it sync. Then Power ON the RBR. I would factory reset the RBR and walk thru the setup wizard at 192.168.1.1 with a wired PC. This should help you get the RBR connected to the Modem.
Unless the ISP has done something else to the modem, this should work.
You can use the modems DMZ in router mode for the RBR in router mode as a back up plan.
charleyp1 wrote:Trust me, I have. I spent 3 1/2 hours yesterday troubleshooting this. The only setting change I am aware of that needs to be made is enabling bridge mode. If there is another setting change to be made, no one has discovered and posted about it, as far as I can tell. I scoured every possible setting that can be changed in the Arris TG1682G and there is no way for a home user to, say, disable the wireless transmitters short of enabling bridge mode. If anyone has any suggestions on what else can be fiddled with in the modem, I'd love to hear them.
I had previously asked and you responded. Did you remove all the other devices from Arris TG1682G except the Orbi and it's still not resolving a Public IP address.
"2. No other devices are connected to Arris TG1682G ethernet ports.2. I do have things plugged in there so maybe that's the issue."
ISPs limit the number of Public IP addresses they assign to an account. Usually they only allow one device to resolve through the Ethernet ports. Most likely though when you put the Arris TG1682G in bridge mode the ethernet ports are not turned off. So if you have another device conneted the Orbi is racing the other device for that public IP address.
This is why most retail modems have only one ethernet port as the ISPs limit number of devices.
I would highly recommend only having the ORBI connected to the Arris TG1682G via ethernet and the other devices on the Orbi LAN ethernet ports
