Modem to Router to Ethernet Devices Dilemma

[Andrew5]

Hello,
I am thinking of using my router as a "hub", instead of my finicky Wireless Gateway Modem.
The Router has many more features that I'm eager to use, and has a more reliable firmware.
Unfortunately, as the Modem is currently the DHCP Server Host, I can't take advantage of the Router.

--> = Ethernet connection
> > > = Wireless connection

Here's how my network is currently set up:
Wireless Gateway Modem (DHCP Server) --> Ethernet Hub --> Ethernet Devices
Wireless Gateway Modem (DHCP Server) --> ASUS Router > > > Wireless Devices

Here's how I'm wanting my network to be set up:
Wireless Gateway Modem --> ASUS Router (DHCP Server) --> Ethernet Hub --> Ethernet Devices
Wireless Gateway Modem --> ASUS Router (DHCP Server) > > > Wireless Devices

However, here's the problem:
My modem AND main ethernet hub are in the basement, at the back of a closet.
My router is in the floor above, to provide a better Wi-Fi connection.
There's only a single ethernet connection between the two, and I'm in need of all 8 wires for EACH connection, so 4 up and 4 down wouldn't work in this case.

The question I'm trying to find an answer for is the following:
How can I get a connection FROM the Modem TO the Router, AND FROM the Router TO the Ethernet Hub with a SINGLE ethernet connection?

I'd appreciate if someone could get an answer for me.

Thanks,
Andrew5

 

[abailey]

The best way to do that is to use VLAN's. That means you need a managed switch. Now it can be a cheap managed switch, but you would need a managed switch on each side.
You could put like an 8 port (or however many you need) in the basement to replace your current switch and like a small 5 port next to your router. Something along these lines: http://www.amazon.com/TP-LINK-8-Port-Gigabit-Ethernet-TL-SG108E/dp/B00K4DS5KU?ie=UTF8&psc=1&redirect=true&ref_=oh_aui_search_detailpage
Netgear also makes some good low cost managed switches.