Implementing QoS on a Windows 2008 Server

These are instructions to create a basic catch-all policy for all traffic generated from a machine running 3CX PhoneSystem which tags all traffic with a DSCP value of 56.

Create a Local Policy for QoS

• Run “gpedit.msc”
• Go to the “Local Computer Policy -> Computer Configuration -> Windows Settings” node.

• Right-click on “Policy-based QoS” and click on “Create new policy …”

• Set the “Policy Name” to “All Traffic”
• Set the “DSCP Value” to 56
• Click the “Next >” button

• Select the “All Application” radio button
• Click the “Next >” button

• Select the “Any source IP address” radio button
• Select the “Any destination IP address” radio button
• Click the “Next >” button

• Set the “Select the protocol this QoS policy applies to” field to “TCP and UDP”
• Select the “From any source port” radio button
• Select the “To any destination port” radio button
• Click the “Finish” button

Apply the New Policy Immediately

• Run “gpupdate.exe”

Checking QoS is Applied to Outgoing Traffic

Running Wireshark will allow you to check that outgoing traffic is indeed being tagged with the correct DSCP value.