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Prerequisetes

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1. Click the Settings Tab and select Static Routes as shown in the diagram

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   Caption 0 Figure 1 Static Routes

2. On the remote-network SBC, add a Static IP Route

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   Caption 0 Figure 1 Add Static IP Route

    

    

3. Create a default route that points to the WAN interface on the HQ SBC. Set the Metric to 1.

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   Caption 0 Figure 1 Create Default Route - Metric 1

    

    

4. Create another default route that points to the IPSec IPsec interface on the HQ SBC. Set the Metric to 2.

   Tip
   Default routes are required for the automated routing failover to function. Only use default routes.

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   Caption 0 Figure 1 Create Default Route - Metric 2

    

    

5. Verify the newly added static routes

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   Caption 0 Figure 1 Verify Static Routes

    

    

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At this point you should be able to call Lync-to-Lync over the WAN.

Creating the

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IPsec Tunnel

Use the following steps to configure an IPsec tunnel between the remote and HQ SBCs.

SBC1000

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IPsec Configuration

The following steps configure the remote SBC to generate an IPsec tunnel to the HQ SBC when the WAN is down.

1. Click IPSec IPsec | Tunnel Tablein the left-hand navigation.

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   Caption 0 Figure 1 Tunnel Table

    

    

2. Add a Tunnel Table

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   Caption 0 Figure 1 Add Tunnel Table

    

    

3. Enter the configuraton information for your IPsec tunnel.

• The Local Subnet Address must be programmed with IP information for the remote network.

• The Remote Subnet Addressmust be programmed with IP information for the HQ network.

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  Caption 0 Figure 1 Enter Configuration Information

   

   

SBC2000

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IPsec Tunnel Configuration

The following steps configure the HQ SBC to receive an IPsec tunnel from the remote SBC when the WAN is down.

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With the successful testing of the static IPsec tunnel, it is time to make the tunnel dynamic so that the 3G4G link is only used activated when the WAN is down.

1. Modify the Remote SBC IPSec IPsec Tunnel Activation to Link Monitor Action and click OK.

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   Caption 0 Figure 1 Modify Tunnel Activation

    

    

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