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Optimizing Your Network Adapter for High Audio/Video Traffic

Communications Server 2007 R2

Topic Last Modified: 2009-01-22

Some network adapters allow you to optimize performance for high audio/video traffic. For many deployments, it is sufficient to use the default settings on your network adapter. If your network adapter supports optimization, it is recommended that you increase the receive and transmit buffer settings on the network adapter to three times their default value in the following situations:

  • If you anticipate audio and video traffic on any particular Audio/Video Conferencing Server or Audio/Video Edge Server to exceed 200 to 250 Mbps.
  • If your servers experience packet loss on the network.
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Increasing receive and transmit buffer settings can improve performance but will also consume system memory.

You can use the following procedure to change these settings on many network adapters. However, the procedure varies depending on the manufacturer and is not available for all network adapters.

  1. Log on to the computer that is running the Audio/Video Conferencing Server or Audio/Video Edge Server as a member of the Administrators group.

  2. Click Start, point to Administrative Tools, and then click Computer Management.

  3. In the console pane, click Device Manager.

  4. In the details pane, expand Network adapters.

  5. Right-click the network adapter, and then click Properties.

  6. Click the Advanced tab.

  7. Under Settings, click Performance Options, and then click Properties.

  8. Under Settings, click Receive Descriptors, and then in Value, change the setting to three times the default value.

  9. Click Transmit Descriptors, and then in Value, change the setting to three times the default value.

  10. Click OK, and then click OK again.

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