Choosing the default network card (NIC) that should access the Internet

In the presense of multiple network adapters, it is sometimes necessary to manually specify which one is the default used for internet routing, for example. To accomplish this, you have to manually add a “metric” to each interface. Windows will automatically use the interface with a lower metric. To check and change your network adapters’ metric:

1. Open Command Prompt and type: route print – you will see a list of active routes, the last column displaying their “metric”. Lower metric routes are preferred over higher ones.

2. Open the Network Adapter Properties (Control Panel > Network and Internet > Network Connections > right-click on adapter and choose Properties)
3. Open the properties of Internet Protocol Version 4 (TCP/IPv4).
4. Click on Advanced.
5. Untick “Automatic Metric” and set the interface metric to a number.
6. Hit OK until you close the Network Adapter properties.
7. Repeat steps 2-6 for your other network adapter(s) choosing different metrics. Remember lower metrics are preferred over higher ones.

Check the new metrics in Command Prompt by typing: route print

source: http://www.speedguide.net/faq_in_q.php?qid=350

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