Series 3: What is the proper way to setup a GRE Tunnel between 2 CradlePoint routers?

To determine the series of your CradlePoint router please click here

This article was written based on the 5.0.0 series 3 firmware version.

Description:

This purpose of this document is to provide directions to setup a basic GRE terminated tunnel between capable CradlePoint Series 3 routers where both connections have static IP addresses. 

TERMS:

Generic Routing Encapsulation (GRE)– a tunneling protocol that can encapsulate a wide variety of network layer protocols inside virtual point-to-point links over an Internet Protocol internetwork.

REQUIREMENTS:

•Two (2) Series 3 CradlePoint products capable of GRE termination (MBR1400, MBR1200B, CBR400, CBR450, IBR600 and IBR650) on firmware version 4.2.0.
•Two (2) WAN sources with static publicly routable IP address
•Two (2) computers (for testing  GRE functionality)Directions:

  1. [Router #1] Log into the CradlePoint’s admin console on Router #1
  2. [Router #1] Click Internet -> GRE Tunnels                                                                 User-added image
  3. [Router #1] Click Add to create a new tunnel.                                                                                           User-added image
  4. [Router #1] On the first page of the GRE wizard, give the tunnel a unique “Tunnel Name”.  In our example, the “Tunnel Name” is “Test”.  You will use the same “Tunnel Name” later when setting up Router #2.  Following are a description of the other options that can be configured in this window.  For this example we will not be using them.                               •Local Network- Select an IP address separate from you LAN IP address.
    •Remote Network- Select an IP address on the same subnet as the Local Network
    •Subnet Mask- Use a /30 subnet to create a network with only 2 host addresses.
    •Remote Gateway- The WAN IP address of Router 2.
    •Tunnel Enabled- Ensure it is checked
    •Keep Alive- Check the enabled box if you would like Keep Alive Packets sent through the tunnel to monitor the status of the tunnel.
    •Click Next to continue.                                                       User-added image
  5. [Router #1] On the “Routes” page, click the Add Route button.
  6. [Router #1] On the “Routes” page, enter Router #2’s LAN IP address and subnet mask, as well as any other LAN IP addresses you would like to have access to the tunnel.
  7. Click Next.                                                                                                                                   User-added image
  8. You can Enable Keep alive on this next page if need be, and click Finish 
  9. [Router #2] Log into the CradlePoint’s admin console on Router #2.
  10. [Router #2] Click Internet -> VPN Tunnels
  11. [Router #2] Click Add to create a new tunnel.
  12. [Router #2] On the first page of the GRE wizard, use the “Tunnel Name” “Test”.  In our example, the “Tunnel Name” is “Test”.  You will use the same “Tunnel Name” as when you set up Router #2.                                                                                                                                                                                                                                                          •Local Network- Enter the same address you used for Router #1’s Remote Network.
    •Remote Network- Enter the same address you used for Router #1’s Local Network
    •Subnet Mask- Use a /30 subnet to create a network with only 2 host addresses.
    •Remote Gateway- The WAN IP address of Router #1.
    •Tunnel Enabled- Ensure it is checked
    •Keep Alive- Check the enabled box if you would like Keep Alive Packets sent through the tunnel to monitor the status of the tunnel.
    •Click Next to continue.                                                                                                             User-added image
  13.  [Router #2] On the “Routes” page, click the Add Route button.
  14. [Router #2] On the “Routes” page, enter Router #1’s LAN IP address and subnet mask, as well as any other LAN IP addresses you would like to have access to the tunnel.
  15. Click Next.                                                                                                                                 User-added image
  16. Once again, you can use the Keep Alive if need be, and click Finish.
  17. Now that both tunnels have been configured and enabled, go to Status –> GRE (from either computer) to view the status of the tunnel.User-added image

Category: Cradlepoint Series 3

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