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Global VPN Client slowing down the internet speed
05/19/2022 
2 People found this article helpful
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Description
Usually when the user connects to GVC and gets a slow internet speed we run a DiagCab file (Cssmerg) to fix the issue. DiagCab file disables the RSC due to which the speed gets better. But if the issue persists after rebooting the device, this might be the issue with the Intel Wireless Device Drivers and Windows OS.
Cause
If running the DiagCab file causes the issue to go away but causes the Wi-Fi adapter to malfunction, then its due to other applications that are installed that is conflicting with the driver when you make a change.
Resolution
- Uninstall GVC.
- Reboot the PC.
- If you are running Cisco AnyConnect, uninstall it as running to IPSec Client applications contributes to this issue.
- Reboot the PC and do not install this back again.
- Uninstall Intel(R) Wi-Fi 6 AX201 fully. Reboot the PC.
- Install the latest Intel(R) Wi-Fi 6 AX201 drivers from the PC manufacturers website. Reboot the PC.
- Follow the 'Steps to disable RSC manually'.
- Open an Admin Command Prompt window:
Start > All Apps > Windows System -> Right-click "Command Prompt" > More > Run as administrator
- Get your network adapter name:
powershell Get-NetAdapter
- Note your adapter's name (Example: Wi-Fi)
- Get your network adapter "Receive segment coalescing" (Rsc) settings:
powershell Get-NetAdapterRsc
- Disable Rsc for your network adapter:
powershell Disable-NetAdapterRsc -Name ADAPTER_NAME_FROM_BEFORE
... Be sure to replace ADAPTER_NAME_FROM_BEFORE with whatever your network adapter name is, without quotes
- Verify Rsc is disabled for ipv4 and ipv6, on your network adapter:
powershell Get-NetAdapterRsc
... Should now show IPv4Enabled False, and IPv6Enabled False, for your network adapter
- Re-test your wireless internet connection.
- Reboot the PC and test the internet.
- If the above works, then install GVC 5.0 version.
- After the installation, Reboot the PC and test again.
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