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Connecting two networks / two ISPs?

Last response: in Networking
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April 22, 2012 11:06:29 PM

Hello,


I have a 192.168.1.xxx network connected to Verizon FIOS via Actiontec MOCA / router.
I also have a 192.168.15.xxx network connected to Comcast via Motorola VT2442 router (used for Vonage) and a Motorola SB6121 cable modem.

Each network has it's own gigabit switch connected to each router. The two networks are physically separated but switches and routers are physically side by side.

What is the best configuration to allow devices on 192.168.1.xxx network to communicate with devices on the 192.168.15.xxx network (share printers, NAS, etc), but still have each network served by it's respective ISP, and each device still get it's dhcp, dns, gateway, etc from each respective router?
April 22, 2012 11:53:04 PM

A dual WAN router would be the best solution. The problem is with the Verizon install; if it's connected via Coax, you will need to bridge it.

April 23, 2012 2:04:07 AM

What I am trying to do is connect two different private LANs for sharing of printers, NAS, etc ... but each private LAN on a different network and a different ISP continues to function as such.

192.168.1.xxx to see and share resources with 192.168.15.xxx BUT

192.168.1.xxx uses Verizon, and 192.168.15.xxx uses Comcast for accessing the internet.


Verizon Comcast
| |
router router
| |
192.168.1.xxx <---------> 192.168.15.xxx


So I am thinking I need a router between 192.168.1.xxx and 192.168.15.xxx to router traffic just between the two?
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April 26, 2012 1:22:01 AM

I think I discovered the solution ...

Set one router to 192.168.1.1, and set the other to 192.168.1.2

Set the devices using static IPs to use one router (Verizon), or the other router (Comcast)

Link the Switches to each other

Now - everyone is on 192.168.1.x so they can share resources, but use different ISPs for connecting to the internet.

Turn off DHCP in one router and only use DHCP on the other one, simply keeping in mind which traffic needs to go where.
April 26, 2012 1:36:56 AM

That is certainly one way to do it.
April 28, 2012 8:50:17 PM

It all works likes a charm. I have about 6 devices using the Verizon side (using 192.168.1.1 as the router), plus all the Verizon internet related TV stuff (for the guide for example), and about 6+ devices using the Comcast side (using 192.168.1.2 as the router). Everyone can see each other and see all the network devices / printers / etc.

I have disabled DHCP on the Verizon router and using static IPs for the devices I want to go over Verizon, and I have DHCP enabled on the Comcast router, as well a as some static IPs to control what goes out the Comcast side.

So now - I can move devices to different ISPs as I monitor why the Verizon side keeps locking up after 2 - 3 days - even after a change of Verizon ActionTec router.

Thankfully I am using existing and borrowed equipment for this experiment, and I got Comcast Blast! internet service for $29.99 for 18 months ... as a result I am paying an extra $30 / month for this experiment and secondary / backup internet connection.
July 23, 2012 5:17:23 PM

guys!..i already done that...but how will u maximize your both internet connections by that configuration?. example if the devices using 192.168.1.1 all are off(not in use)?...it means the 192.168.1.1 internet speed is available..devices set under static ip of (192.168.1.1) are the devices can access the 192.168.1.1 router and can use internet speed..so does this means that the 192.168.1.2 cannot use the internet speed of 192.168.1.1..because of this setting..if your going to use DHCP on both router they can use either but there is a problem..unstable connection because your device will confuse where to get connection on 192.168.1.1 or 192.168.1.2..so what will be the costless solution?..a firewall a network server or a dual wan?
!