Networking Connectivity
IntelŽ Ethernet Server Adapter X520 Series
Poor performance after uninstalling DCB/FCoE feature

Description:
After uninstalling the Data Center Bridging/Fibre Channel over Ethernet feature, leaving the base drivers installed, data transfer rates are slower than expected.

Solution:
Choose one of two solutions.

Solution 1 -- Reinstall the Data Center Bridging/Fibre Channel over Ethernet feature and disable DCB

  1. Launch installation from the Intel® Network Connections software CD or software download package
  2. Click Next on the wizard welcome screen
  3. Select Modify and click Next
  4. Select the Data Center Bridging/Fibre Channel over Ethernet feature and click Next
  5. Click Install on the Ready to Modify the Program screen
  6. Click finish after installation completes
  7. Open the Windows* device manager
  8. Open the Intel® Ethernet Server Adapter X520 properties
  9. Select the Data Center tab
  10. Unselect Use Data Center Bridging
  11. Repeat steps 8 through 10 for each instance of Intel® Ethernet Server Adapter X520 properties
  12. Optional: Remove the Data Center Bridging/Fibre Channel over Ethernet feature

Solution 2 -- Completely remove Intel® Network Connections software including the drivers and install the software without the Data Center Bridging/Fibre Channel over Ethernet feature.

Note This procedure removes network connection drivers for all Intel® Ethernet connections. All remote connections will be lost.
A restart of your computer may be required after the uninstall is completed.
  1. Open Uninstall a program in Windows* device manager.
  2. Double click Intel® Network Connections
  3. Ensure all features are selected and click Remove
  4. Click Yes on the  "Are you sure ..." message window
  5. Click Finish on the completion screen
  6. Restart your computer if prompted
  7. Install Intel® Network Connections without selecting the Data Center Bridging/Fibre Channel over Ethernet feature

This article applies to Intel Network Connections version 15.4 and 15.4.1. Intel plans to resolve this issue in a future software release.

This applies to:

IntelŽ Ethernet Converged Network Adapter X520 Series
IntelŽ Ethernet Server Adapter X520 Series
IntelŽ Ethernet Server Adapter X520-DA2
IntelŽ Ethernet Server Adapter X520-LR1
IntelŽ Ethernet Server Adapter X520-SR1
IntelŽ Ethernet Server Adapter X520-SR2

Solution ID: CS-031687
Last Modified: 07-Oct-2013
Date Created: 29-Jun-2010
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