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Forum Discussion
Connecting R7000 with Xfinity gateway in bridge mode - use WAN or LAN?
This seems to be a common problem but I still can't get the answer. I have an Xfinity XB3 wireless gateway (Cisco model #DPC3941T) and a Netgear R7000 Nighthawk wireless router. I've set the Xfinit...
Thanks TheEther. So I believe that Xfinity local IP network is using 10.0.0.1/255.255.255.0. I'm not sure where to change the subnet for the R7000. I do see a setting that says to get the Internet IP address dynamically from the ISP. Do I need to change it to use a static IP address?
No, leave the setting to get the Internet IP address dynamically from the ISP. You should confirm that the IP address listed on that page is a public IP address. In other words, it should NOT be 192.168.1.X, 10.X.X.X, or 172.16.X.X. If it IS one those addresses, then the Xfinity gateway is not in bridge mode. Otherwise, the R7000 should have received a public IP address.
The subnet that you want to change is under ADVANCED > Setup > LAN Setup. Since the Xfinity gateway is using 10.0.0.1/255.255.255.0, you can change the R7000's LAN IP address to 192.168.1.1 and subnet mask to 255.255.255.0.
Hmm, so I did what you said and the R7000 LAN port already has the IP address and subnet mask that you suggested. Which got me to thinking that maybe it's not the router or gateway that's messed up, but rather it's me. Full disclosure -- what I left out was that I am trying to connect a Netgear Powerline adaptor to the LAN port of the router, which is used to allow web control for my home alarm system. So I tried to connect my laptop to the LAN port of my R7000 router, and...lo and behold it connects to the Internet fine.
So now my question becomes why does the Powerline adaptor not work when connected to the LAN port of the router (the led light for the LAN port is a solid orange for the Powerline adaptor as opposed to solid white). It worked fine before I got the Xfinity wireless gateway when I was using my R7000 router with a regular cable modem. I know less about powerline adaptors than about routers and modems (which is not a lot to begin with) so I'm just throwing this out there without much hope of an answer - maybe I need to go to a different forum?
TheEther - thanks for your help anyways.
The LAN port on the router could be orange because the Powerline adapter has a Fast Ethernet (100 Mbps) port. The light will only be white if the Powerline adapter has a Gigabit Ethernet port. If it does have a Gigabit Ethernet port, then you should try a different Ethernet cable; it could be bad.
The Netgear Powerline is a 200Mbps nano adaptor (model XAV2101v2), so I'm assuming that means it does not have a Gigabet Ethernet port and therefore your diagnosis is certainly probable. But what bugs me is that it worked fine with the same R7000 router and a regular cable modem before I got the Xfinity wireless gateway. If that was the case, does that mean your diagnosis is not the problem? I did check the ethernet cable using my laptop and it's fine.
When I first got the Xfinity wireless gateway, I used it as intended (without the R7000) and stuck the Powerline adaptor into one of its ports and the adaptor worked fine. I'm tempted to put the Xfinity XB3 back into router mode and see if that's still the case (trying to narrow the issue and make sure it's not the adaptor). Although I've read so much frustration about getting the Xfinity to work correctly in bridge mode that I'm somewhat reluctant to do this (it's why I inititally thought the problem was due to the bridge mode and neglected to mention that I was testing a Powerline adaptor).