Connecting two networks / two ISPs?


I have a network connected to Verizon FIOS via Actiontec MOCA / router.
I also have a 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 network to communicate with devices on the 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?
6 answers Last reply
More about connecting networks isps
  1. 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.
  2. 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. to see and share resources with BUT uses Verizon, and uses Comcast for accessing the internet.

    Verizon Comcast
    | |
    router router
    | | <--------->

    So I am thinking I need a router between and to router traffic just between the two?
  3. I think I discovered the solution ...

    Set one router to, and set the other to

    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.
  4. That is certainly one way to do it.
  5. It all works likes a charm. I have about 6 devices using the Verizon side (using 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 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.
  6. guys!..i already done that...but how will u maximize your both internet connections by that configuration?. example if the devices using all are off(not in use)? means the internet speed is available..devices set under static ip of ( are the devices can access the router and can use internet does this means that the cannot use the internet speed of 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 or what will be the costless solution?..a firewall a network server or a dual wan?
Ask a new question

Read More

Routers Devices Networking