NETGEAR is aware of a growing number of phone and online scams. To learn how to stay safe click here.

Forum Discussion

Sabathious's avatar
Sabathious
Follower
Oct 11, 2017

Can a C6250 be configured to receive input from Ethernet instead of coax?

I’m trying to use the router portion of my c6250.  Problem is it only has a coax input.  

My isp, comcast/Xfinity, will only supply data to one cable modem.  I’m currently leasing a cable/modem from them becuase it supports their voip service (802.11n arris XB2 model modem/router) but I’m am just using this for voip and as a gateway, and then I am using an Ethernet cable to supply my router (ASUS dual band 3x3 802.11ac gigabit router model rt-ac1750).

Now becuase of coverage and lack of Ethernet ports I’d like to throw my neat gear into the mix but it doesn’t seem to have any inputs other than the coax.  My question is Can I configure one of the Ethernet lan ports (or usb for that matter) to be an input for the c6250?  Is this double NAT possible and does it cause problems?

im running win 10 on a desktop, 3 laptops, iOS on 2 iPhones & 2 iPads, 3 smart TVs, an Xbox one, a ps4, two network dedicated terabyte external hard drives usb connected via router, and a partridge in a pear tree. Any advise helps i’m here to learn.  Thanks!

Features
Hardware
Installation
Troubleshooting

1 Reply

  • antinode's avatar
    antinode
    Guru
    Oct 11, 2017

    > Now becuase of coverage and lack of Ethernet ports [...]

       Poor _wireless_ "coverage"?  From what I can see, a C6250 won't give
    you much in the way of Ethernet ports (unless you add an external
    Ethernet switch).

    > My question is Can I configure one of the Ethernet lan ports (or usb
    > for that matter) to be an input for the c6250?

       Forget USB for networking.  As a router, I don't see a way to make a
    LAN port into a WAN port on this device.

       Is this double NAT possible and does it cause problems?

       Stacking two routers can cause NAT problems, but you're safe on that
    front if you can't configure an Ethernet WAN port.

       I don't see an official setting for wireless access-point mode, but
    you should be able to do it the old way, without the special setting.
    Assign some suitable LAN address to the C6250 LAN interface, so that
    you'll be able to talk to it later: ADVANCED > Setup > LAN Setup : LAN
    TCP/IP Address : IP Address.  (Here, "suitable" means something
    available on the real router's subnet.)  Disable its DHCP server:
    ADVANCED > Setup > LAN Setup : Use Gateway as DHCP Server.  Connect one
    (either) of its LAN ports to a LAN port on the real router.

       In that mode, the wireless radios and the remaining Ethernet port
    should be part of the real-router subnet.