image0021272712470336.jpg Figure 1 Uncheck the box marked Automatic metric, and then enter 1 in the Interface metric: box. image0041272712470352.jpg Figure 2
Repeat these steps to configure the second external network interface, this time using an Interface metric: value of2. Be sure to configure a default gateway on this second external interface. Generally this is not recommended, and Windows will complain when you attempt to do this. image0061272712470352.jpg Figure 3
In this scenario it is safe to disregard this warning and select Yes to proceed. Note:
If your ISPs use DHCP to assign addresses, you will not be able to configure multiple default gateways. In this case you will create default persistent static routes before configuring ISP-R. In our example here, those routes would be configured as follows:
route add –p 0.0.0.0 mask 0.0.0.0 131.107.54.46
route add –p 0.0.0.0 mask 0.0.0.0 207.213.91.214 Configuring ISP Redundancy
Once the initial network interface configuration is complete, open the TMG management console and in the console tree highlight Networking, then select the ISP Redundancy tab. image0081272712470368.jpg Figure 4
In the Tasks pane, click Configure ISP Redundancy. image0101272712601914.jpg Figure 5
Choose Next, then select the ISP redundancy mode that meets your requirements. For demonstration purposes we’ll select the default option Load balancing with failover capability.
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