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Connecting a Router and a Hub

L

lukatmyshu

Senior member
If I have a 4 Port Router (4 Out, 1 In ... one of the four can be an uplink) and a 4 Port Hub can I just plug the Uplink on the Router into the WAN connection on the Hub? If I am sharing an Internet connection will this allow potentially 7 (3 on Router, 3 on Hub) computers to connect w/o obtaining individual IPs? Thanks
 
My favorite answer applies here. It depends. 🙂

If the uplink connection on the Router is X-over (likely), and the WAN connection on the hub is in fact an E-net connection, and is wired for straight through, then yes. If the WAN connection on hub is wired X-over, then you need to use a X-over cable. (crossed + crossed = straight. Then straight + crossed = crossed.)

That's the physical connection. Now, as to whether or not you will get additional IP's.

It also depends.

On how your ISP provides you with access. Do you you use IP Masquerading or NAT? Using private ip's on your LAN?
At my home, I get a static IP from my ISP, that is on my Router's Wan link. Router then functions as a DHCP server handing out private IP's to Hosts on LAN.

Hope this helps.

 
You can plug a regular port of the Hub to a regular port in the Router, and the rest of the regular ports (Router and Hub) can be used for computers. The DHCP of the Router should work for the Whole LAN.

Connecting Regular port or Uplink is just a matter of using the right version of CAT5 cable.


The Rules:

(Hub or Switch is the same for cabling purposes.)

NIC to NIC - Crossover Cable.
NIC to HUB - Straight Cable
NIC to Uplink - Crossover Cable (Uplink is NIC Jack on Hub/Switch).

HUB (regular) to HUB (regular) - Crossover Cable.
HUB (regular) to HUB Uplink - Straight Cable.
HUB Uplink to HUB Uplink - Crossover Cable

Cable/DSL entry (WAN) on a Cable/DSL Routers is an Uplink.

==========================================================================

Cable/DSL Modems unfortunately don't have connection standard.

If your Modem came with Straight Cable:

Modem to NIC - Straight Cable
Modem to HUB - Crossover Cable.
Modem to Uplink - Straight Cable

If your Modem Came with Crossover Cable:

Modem to NIC - Crossover Cable.
Modem to HUB - Straight Cable
Modem to Uplink - Crossover Cable.
 
Generally speaking the uplink port on the router should connect to your modem - and it may have a switch for toggling back and forth from straight-through to crossover. All hubs and PC's should connect to the regular ports on the router.
 
I think that Xirys first solution is appropriate in my case. Since the Hub was originally connected to the Cable modem w/o any special cabling I would imagine that it is straight-through. However I don't know if switching the uplink on my router changes it from being straight to X-over. I'll have to investigate. Essentially all I wanted to know if this was the appropriate way to do this with the hardware that I have. My ISP is essentially a static-IP (I believe they want us to use DHCP so I do) and my router functions as my local DHCP server. The computers connected to the Hub are going to see a small performance hit right? Because the hub is only 10 mbps, and the router allows 100 mbps (irrelevant for internet operations, but relevant for local network transfers) thanks for all your help.
 
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