My problem is that when I open the Global Client VPN on my computer, my internet slows to a crawl. It goes from ~100Mbps to <2Mbps, or less than 1Mbps.
This happens as soon as I open the client. The slowdown happens with or without the VPN connected. As soon as I shut down the client, my network speed goes back to normal.
After searching on Google, I found that is a problem issue whit RSC (Receive Segment Coalescing), which explains why the upload was always faster than the download.
There are details how to manually disable, and that is what ultimately fixed my problem.
Solution (recommended by Microsoft):
Disable “Receive segment coalescing” (Rsc) on your wireless adapter
Steps to disable Rsc using Microsoft’s automated tool:
1) Download the “.diagcab” file located here:
DOWNLOAD2) Run it, and let it see if it can determine the problem and fix it.
3) Re-test your wireless internet connection.
OR you can do it manually with those steps below.
Steps to disable Rsc manually:
1) Open an Windows PowerShell (As Admin)
2) Get your network adapter name: powershell Get-NetAdapter
3) Note your adapter’s name
4) Get your network adapter “Receive segment coalescing” (Rsc) settings:
powershell Get-NetAdapterRsc
for adapter name [Your Name], that had IPv4Enabled True, and IPv6Enabled True
5) Disable Rsc for your network adapter:
powershell Disable-NetAdapterRsc -Name YOUR_NAME_ADAPTER without quotes
6) Verify Rsc is disabled for ipv4 and ipv6, on your network adapter:
powershell Get-NetAdapterRsc
RESULT : IPv4Enabled False, and IPv6Enabled False, for your network adapter
7) Re-test your wireless internet connection.