Configuring reserved bandwidth settings in Windows 10/8.1



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In general, bandwidth is the speed at which data moves from one computer to another. In other words, the bandwidth is the range covered for data transmission between an upper and a lower range. Bandwidth is generally controlled by your Internet Service Provider (ISP). However, some Windows Windows settings limit the bandwidth that can be reserved for your system.

Mainly Windows reserves a certain amount of bandwidth for its application and operational needs. You can easily limit the bandwidth that can be reserved by configuring it in group policy. This article shows you step by step how to access or open reserved bandwidth on your Windows 10/8.

Limit reserved bandwidth under Windows



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1 Press the Windows key + R combination, type gpedit.msc in the Run dialog box and press Enter to open the Local Group Policy Editor.

2 Navigate here:

(1)Computer Configuration -> Administration -> Network -> Qos

3 Look for the named parameters Limit Reserved Bandwidth in the right part of this window, by default one Status Not Configured must be displayed. Double-click the same parameter to change it:

This policy parameter determines the percentage of connection bandwidth that the system can reserve. This value limits the combined bandwidth reservations of all programs running on the system. By default, the packet scheduler limits the system to 80% of a connection’s bandwidth, but you can use this setting to override the default value. If you enable this setting, you can use the Bandwidth Limit field to adjust the bandwidth that the system can reserve. If you disable or do not configure this setting, the system uses the default value of 80% of the connection. If a bandwidth limit is set in the registry for a specific network adapter, this setting is ignored when configuring that network adapter.

4 In the Enabled window shown above and in section , select Options; you can enter the percentage to limit the bandwidth. If you enter 0 percent here, you can earn the bandwidth reserved by the system. UPDATE: Read the following notice.

Click Apply followed by OK. You can now close the local group policy editor and restart the system with the bandwidth gained.

If your Windows version does not come with Gpedit, you can open Regedit and navigate to the following registry key :

HKEY_LOCAL_MACHINESOFTWAREP policiesMicrosoftWindowsPsched

Set it to Data 0. If Psched does not exist, create it.

I hope you find this advice useful!

The statement that Windows always reserves a percentage of the available bandwidth for quality of service is incorrect. One hundred percent of the network bandwidth is available for all programs, unless a program explicitly requests priority bandwidth. This reserved bandwidth is always available for other programs, unless the requesting program is sending data. If the program that reserved the bandwidth does not send enough data to use it, the unused portion of the reserved bandwidth is available for other data streams on the same host , says KB316666

Then what happens if you set the reserved bandwidth limit to zero

Here is what Microsoft has to say:

Windows operating system reserves a fixed percentage of total Internet bandwidth for QOS usage or quality of service such as Windows Update, license renewal, etc. So, if you limit the operating system bandwidth that can be reserved to 0, this will certainly affect operating system activities, such as automatic Windows updates . If a QoS application reserves more bandwidth than it uses, the unused and reserved bandwidth is available for other applications. The reservation does not guarantee that the QoS application bandwidth is available because applications that are not QoS can consume too much bandwidth.

More information on TechNet.



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