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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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Last Modified Date7/22/2019 7:32 PM
This article describes an issue on Windows 10 where end user experiences slow download speeds/unable to access resources over physical adapter 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, end 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 Desktop client installed, when connected over physical adapter (with or 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.
This issue is caused by an incompatibility with the Juniper Network Service which binds to physical adapters when Pulse Desktop Client is installed and Microsoft's Receive Segment Coalescing feature. 


We apologize for the inconvenience caused. Pulse Secure engineering is currently investigating this issue. The fix requires us to update our NDIS to Version 6.30 or later and then formally support/qualify RSC.

The following are the tentative timelines for a permanent solution :

1.  Pulse NDIS driver upgrade to 6.3 or later to be delivered as part of Pulse Desktop Client  9.1R4 (Tentative for Jan, 2020).
2.   RSC Support/Qualification to be delivered as part of Pulse Desktop Client 9.1R5/9.2R1 (Tentative for April, 2020).

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 physical 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.
From a DOS command prompt run the command: 
-Start > Run > ncpa.cpl
  1. Locate the physical adapter in the Network Connections
  2. Right-click on the adapter and select Properties.
  3. From the list, uncheck the checkbox for Juniper Network Service
User-added image
  1. Connect with Pulse Desktop Client. (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 Pulse Secure virtual adapter
User-added image'
  1. Right-click the adapter and select Properties
  2. From the list, uncheck the checkbox for Juniper Network Service
User-added image

Workaround 2: Disable RSC from the physical 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 physical adapter.)

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

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
Run the following command to verify that RSC is disabled:
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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