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KB43833 - Slow download speeds/unable to access resources over Wifi via Pulse Desktop client on Windows 10 Redstone 3 and up

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Information

 
Last Modified Date10/18/2018 11:07 PM
Synopsis
This article describes an issue on Windows 10 where user experiences slow download speeds/unable to access resources over Wifi via Pulse Desktop client on Windows 10 Redstone 3 and up
Problem or Goal
Possible symptoms:
  • PC is running Windows 10 Redstone 3 (version 1709) or higher.
  • With Pulse client connected, user may see resource access and slowness issues via VPN.
  • Issue seems to affect  Intel ® Wireless-AC 9560 on particular hardware like DELL 5530 and HP Zbooks 15.
  • With Pulse client installed,when connected over Wifi (without Pulse VPN tunnel) user experiences slow network speeds.
  • When a speed test is performed the download speed is lower than the upload speed.
  • Ethernet or wired connection is not impacted.
  • If Windows system is using Hyper-V then download speed is also impacted on virtual machines configured with Hyper-V that are bridged to the host system via Wifi where the host system has Pulse Desktop client installed.
Cause
This issue is caused by an incompatibility with the JNPRS (Juniper Network Service) which binds to physical adapters when Pulse is installed and Microsoft's Receive Segment Coalescing feature. 

 

 
Solution
Pulse Secure engineering is currently investigating this issue.  This article will be updated with with the fix details once the issue is identified and resolved.  

Workarounds/Temporary Solutions:

The following workarounds have been implemented by customers and have been reported to help.
  • Workaround 1: Disable the Juniper Network Services from the wireless and virtual adapter:  (If the Pulse connection is being used to connect to an SRX device, then this should not be performed.  See below for a workaround that can be applied to SRX connections.)

  1. Open Control Panel and select Network and Sharing Center the select Change adapter settings.
OR
From a DOS command prompt run the command: 
-Start > Run > ncpa.cpl
 
  1. Locate the wireless adapter in the Network Connections and right-click on the adapter and select "Properties".
  2. Disable the Juniper Network Service by deselecting it.

User-added image
  1. Connect with Pulse. (This is necessary to change the virtual adapter settings.  If the Pulse tunnel is not connected, the virtual adapter does not appear in the Network Connections.)
  2. From the Network Connections select the Pulse Secure virtual adapter
User-added image'
  1. Right-click and select Properties
  2. Disable the Juniper Network Service by removing the checkmark from the service
User-added image
 
 
  • Workaround 2: Disable RSC from the wireless adapter: (If Pulse is being used to connect to an SRX device then the Juniper Network Service needs to remain enabled.  In this case, follow the steps below to disable RSC from the wireless adapter.)

  1. Open Powershell
  2. Run the following command to determine which adapter RSC is enabled on:
Get-NetAdapterRsc

If RSC is enabled on the Wi-Fi adapter, for example, the following output will be seen:
User-added image
  1. Run the following command to disable RSC on the Wi-Fi 2 adapter:
Disable-NetAdapterRsc -Name "Wi-Fi 2
Then run the following command again to verify that RSC is disabled:
Get-NetAdapterRSC

The output will change as shown below: 
User-added image
 
  1. To disable RSC on all physical adapters, run the following command:  
Get-NetAdapter | Disable-NetAdapterBinding -DisplayName "Juniper Network Service

 
Related Links
Attachment 1 
Created ByLokesh T K

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