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Re: Setting up nighthawk R7800 behind Comcast cable gateway

Veger70
Aspirant

Setting up nighthawk R7800 behind Comcast cable gateway

I had my nighthawk setup as access point mode behind an older Comcast cable modem. Comcast said they had a new modem that was faster and more secure so I ordered it. It’s a arris TG3482G. I set it up and connected to the 5.0ghz and did a Speedtest 55mbps same as my old modem. I then left the nighthawk in ap mode just connected the Ethernet and signed in to the old ssid so I know I was on the netgear and got 160mbps. Unfortunately I signed into the nighthawk and changed the ssid to the new arris ssid then re-signed in and tried to access to nighthawks router configuration page no luck. Did a factory reset still can’t reach it at routerlogin.net. Don’t remember it being that hard to reach the netgear modem. So I’m asking whats the optimum configuration for running the nighthawk behind the xfinity to get the best WiFi speeds? and maybe a little help on the procedures on configuration of the netgear.

Model: R7800|Nighthawk X4S AC2600 WiFi Router
Message 1 of 6
antinode
Guru

Re: Setting up nighthawk R7800 behind Comcast cable gateway

> I had my nighthawk setup as access point mode behind an older Comcast
> cable modem. [...]

   Where "modem" really means "modem+router"?  Did it have a maker and
model number?

> [...] Comcast said they had a new modem that was faster and more
> secure so I ordered it. It's a arris TG3482G.

   Another modem+router.

> [...] Unfortunately I signed into the nighthawk and changed the ssid
> to the new arris ssid then re-signed in and tried to access to
> nighthawks router configuration page no luck.

   What, exactly, do "re-signed in" and "no luck" mean to you?  "tried
to access" it how, exactly, from where?

> [...] Did a factory reset still can't reach it at routerlogin.net.

   When you do what?  From a computer connected to what?

   After a settings reset, a computer which is connected (wire or
wireless) to the R7800 should be able to use a
"[www.]routerlogin.{com|net}" name to reach the router's web site.  If
you interpose another (modem+)router between the computer and the R7800,
then those names may fail.

   For a router configured as a WAP, those names will always fail.

> [...] So I'm asking whats the optimum configuration for running the
> nighthawk behind the xfinity to get the best WiFi speeds?

   I'd expect what you started with: the R7800-as-WAP behind the
ISP-supplied gateway.  Without knowing how the R7800-as-WAP was
configured for the old modem+router, it's tough to say why it didn't
work immediately with the new one, or, if it did, what happened when you
started playing with it.

> [...] maybe a little help on the procedures on configuration of the
> netgear.

   Visit http://netgear.com/support , put in your model number, and look
for Documentation.  Get the User Manual.  Read.  Look for "Use the
Router as a WiFi Access Point".  If you want to configure the R7800 as a
WAP, then you might do better to connect a computer (only) to the R7800,
do the WAP mode change, and _then_ connect the R7800 to your main
modem+router (with the computer anywhere you'd like).

   Note, however, that with the R7800-as-WAP, a
"[www.]routerlogin.{com|net}" name won't find it, so you'll need to use
its LAN IP address (which will depend on what you did when you said
"Enable AP Mode").

   The alternative to R7800-as-WAP would be TG3482G-as-modem-only, with
R7800-as-router.  I don't know if that's possible, and it might disable
any of the fancy telephone features of the TG3482G.

Message 2 of 6
Veger70
Aspirant

Re: Setting up nighthawk R7800 behind Comcast cable gateway

> [...] Unfortunately I signed into the nighthawk and changed the ssid
> to the new arris ssid then re-signed in and tried to access to
> nighthawks router configuration page no luck.

 

I ment, on my iPad, I signed into the bookmarked nighthawk R7800 configurations page, changed the SSID to match the Arris, when I applied the settings it disconnected me from the WiFi. So I logged back into the Arris SSID, (which should be the same as the nighthawk now) when I tried to log back into the nighthawk config page I couldn’t reach it at the bookmark. I then tried routerlogin.net, it could not find it. I also tried the nighthawk app for iPad. I then reset to factory, all the above attempts failed after the reset. I then checked the Arris connected devices list. It showstopper R7800 connected at 10.0.0.68 but manually entering the address in a browser get no response. I the connected a MacBook directly to the nighthawk w/Ethernet and again tried all of the above contacts routerlogin.net, address typed in browser no response. I then tried disconnecting WiFi on the MacBook and just leaving Ethernet connected just to the nighthawk no connection to the Comcast router modem. No response although I’m not sure how to contact the modem since no internet connection.

Message 3 of 6
antinode
Guru

Re: Setting up nighthawk R7800 behind Comcast cable gateway

> I ment, on my iPad, [...]

   Still ambiguous.  Netgear offers a Genie app for iOS.  You could be
using that, or you could be using a web browser (which you pointed at
something or other).

> [...] I logged back into the Arris SSID, (which should be the same as
> the nighthawk now) [...]

   I assume that this means that you made a wireless-network connection
to something (either the TG3482G or the R7800).

> [...] when I tried to log back into the nighthawk config page I
> couldn't reach it at the bookmark.

   Should I know what your "bookmark" leads to?  I don't.

> [...] I then tried routerlogin.net, it could not find it.

   What, exactly, does "it could not find it" mean to you?  As usual,
showing actual actions with their actual results (error messages, LED
indicators, ...) can be more helpful than vague descriptions or
interpretations.

   "[www.]routerlogin.{com|net}" names work only if your device is
connected to the R7800.  If you're connected to the TG3482G, then you
can expect to get what may be the worst error message in the world.  For
an explanation, try:

      https://community.netgear.com/t5/x/x/m-p/1365830

   Briefly, the idea is that "[www.]routerlogin.net" (or ".com") should
point to your own router, but that's true only if you use your own
router for DNS name resolution.  Regardless, you should be able to get
to the thing using its IP address, if you can determine (or guess) that.
Normally, that would be something like "192.168.1.1", but it could be
different.

> [...] I also tried the nighthawk app for iPad.

   Newer than the old "Genie" app, I gather.  I'd stick to the web
browser -- less unreliable software involved that way.

> [...] I then reset to factory, all the above attempts failed after the
> reset. I then checked the Arris connected devices list. It showstopper
> R7800 connected at 10.0.0.68 but manually entering the address in a
> browser get no response.

   That would happen because, if your computer/device is connected to
the TG3482G, then you're on the WAN/Internet side of the R7800, so your
attemtps to manage the R7800 from there look like Remote Management to
the R7800, and, by default, Remote Management is disabled on the R7800.

   After the reset, the R7800 should be back to full-function router
mode, with the wireless credentials (SSID, passphrase) shown on the
R7800 product label.  You should then be able to connect to the R7800
management web site from any device which is connected to the R7800 LAN,
either wired or wireless.

> [...] I the connected a MacBook directly to the nighthawk w/Ethernet
> and again tried all of the above contacts routerlogin.net, address typed
> in browser no response. [...]

   That should work.  _Which_ address?

> [...] I then tried disconnecting WiFi on the MacBook and just leaving
> Ethernet connected just to the nighthawk no connection to the Comcast
> router modem. [...]

   It's unwise to try to get both wireless and wired connections to one
router at the same time.  If that's what you did above, then all bets
are off.

> [...] No response although I'm not sure how to contact the modem since
> no internet connection.

   You don't need to "contact the modem" to manage the R7800.  If you're
connected to the R7800 (in full-function router mode), then
"[www.]routerlogin.{com|net}" should lead to the R7800 itself, not to
some outside-world site.

   Let's simplify.  Disable the wireless network on the MacBook, and
cable it to a LAN Ethernet port on the R7800.  Disconnect everything
else from the R7800.  Restart the router and the MacBook.  When both
gizmos settle down, open a web browser on the MacBook and tell it to go
to "routerlogin.net".  That should take you to the R7800 management web
site.  If that fails, then you're in trouble.

   If that works, then you should be able to follow the instructions at
"Use the Router as a WiFi Access Point" in the User Manual.  When that's
done, you should be able to connect the R7800 WAN/Internet port to a
TG3482G LAN Ethernet port.  At that point, the R7800 should appear in
"the Arris connected devices list", which will tell you what its new
R7800-as-WAP LAN IP address is.  If you put that address into a web
browser (on a computer which is connected to anything you have), then
you should get back to the R7800 management web site.

Message 4 of 6
Veger70
Aspirant

Re: Setting up nighthawk R7800 behind Comcast cable gateway

Ok I disconnected all but the netgear and the MacBook, still couldn’t reach it through the browser but I noticed the default WiFi channel were up after the reset, so got the password off the bottom and logged in with my iPad typed in routerlogin.net and finally reached the router. Thanks for your help

 

Message 5 of 6
Veger70
Aspirant

Re: Setting up nighthawk R7800 behind Comcast cable gateway

Ok I disconnected all but the netgear and the MacBook, still couldn’t reach it through the browser but I noticed the default WiFi channel were up after the reset, so got the password off the bottom and loggedd in with my iPad typed in routerlogin.net and finally reached the router. Thanks for your help

 

Message 6 of 6
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