Windows 7 / Networking

Configuring QoS Policies

To configure QoS using Group Policy, edit the Computer Configuration\Windows Settings\ Policy-based QoS node or the User Configuration\Windows Settings\Policy-based QoS node. Then, follow these steps:

  1. Right-click the Policy-based QoS node and click Create New Policy.
  2. The Policy-based QoS Wizard appears. On the Create A QoS Policy page, specify a name for the policy. Then, specify a DSCP value (which your network infrastructure can use to prioritize traffic) and a throttle rate (which Windows will use to restrict outgoing bandwidth usage) as needed. Click Next.
    Note Notice that the throttle rate must be entered in kilobytes per second (KBps) or megabytes per second (MBps) rather than the more commonly used kilobits per second (Kbps) or megabits per second (Mbps)-notice the lowercase b. Eight bits equal one byte. Therefore, if you determine the Kbps or Mbps at which you want to throttle, divide that number by 8 when typing it into the Policy-based QoS Wizard. For example, if you want to throttle at 128 Kbps, you type 16 KBps.
  3. On the This QoS Policy Applies To page, select one of the following options: All Applications, Only Applications With This Executable Name, or Only HTTP Server Applications Responding To Requests For This URL. If you are specifying an application, Windows will apply the DSCP value or throttle rate to network traffic generated by that application. To identify the executable file used by a service, use the Services snap-in to check the service properties. If you are specifying a URL, keep in mind that you must specify the URL on the Web server, not on the client computer. Click Next.
  4. On the Specify The Source And Destination IP Addresses page, you can configure the policy to apply to traffic between any two computers. Use network prefix length representation to specify networks-for example, specify to indicate the entire 192.168.1.x network or to indicate the entire 192.168.x.x network. For example, if you want to configure a QoS policy that applies a DSCP value for traffic sent to your e-mail server, you can select Only For The Following Destination IP Address Or Prefix and then type the e-mail server's IP address. (IPv4 and IPv6 addresses will both work.) Click Next.
    Note QoS policies apply only to outgoing traffic, so the computer to which you're applying the policy will always be identified by the source address, and the remote computer or network will always be identified by the destination address.
  5. On the Specify The Protocol And Port Numbers page, you can prioritize traffic based on TCP or UDP port numbers. For example, if you want to throttle all outgoing Web requests, you can select TCP, select To This Destination Port Number Or Range, and then specify port 80. (The HTTP protocol uses TCP port 80.) Click Finish.

Windows applies QoS policies only for domain network location types. Therefore, if a user connects to a wireless network at a coffee shop (and your domain controller cannot be contacted), Windows will not apply your QoS policies. However, if the user then connects to your internal network using a VPN, Windows will apply QoS policies to that VPN connection.

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In this tutorial:

  1. Configuring Windows Networking
  2. Usability Improvements
  3. Network And Sharing Center
  4. Network Explorer
  5. How Windows Finds Network Resources
  6. How Windows Publishes Network Resources
  7. How Windows Creates the Network Map
  8. Network Map
  9. Set Up A Connection Or Network Wizard
  10. Manageability Improvements
  11. Network Location Types
  12. Policy-Based QoS
  13. Selecting DSCP Values
  14. Planning Traffic Throttling
  15. Configuring QoS Policies
  16. Configuring System-Wide QoS Settings
  17. Configuring Advanced QoS Settings
  18. Testing QoS
  19. Windows Firewall and IPsec
  20. Windows Connect Now in Windows 7
  21. Core Networking Improvements
  22. Networking BranchCache
  23. How Hosted Cache Works
  24. How Distributed Cache Works
  25. Configuring BranchCache
  26. BranchCache Protocols
  27. File Sharing Using SMB
  28. Web Browsing with HTTP (Including HTTPS)
  29. DNSsec
  30. GreenIT
  31. Efficient Networking
  32. What Causes Latency, How to Measure It, and How to Control It
  33. TCP Receive Window Scaling
  34. Scalable Networking
  35. Improved Reliability
  36. IPv6 Support
  37. 802.1X Network Authentication
  38. Server Message Block (SMB) 2.0
  39. Strong Host Model
  40. Wireless Networking
  41. Improved APIs
  42. Network Awareness
  43. Improved Peer Networking
  44. Services Used by Peer-to-Peer Networking
  45. Managing Peer-to-Peer Networking
  46. Peer-to-Peer Name Resolution
  47. EAP Host Architecture
  48. Layered Service Provider (LSP)
  49. Windows Sockets Direct Path for System Area Networks
  50. How to Configure Wireless Settings
  51. Configuring Wireless Settings Manually
  52. Using Group Policy to Configure Wireless Settings
  53. How to Configure TCP/IP
  54. DHCP
  55. Configuring IP Addresses Manually
  56. Command Line and Scripts
  57. How to Connect to AD DS Domains
  58. How to Connect to a Domain When 802.1X Authentication Is Not Enabled
  59. How to Connect to a Domain When 802.1X Authentication Is Enabled