User Manual

Rev 4.70
Mellanox Technologies
174
Appendix C: Registry Keys
Mellanox IPoIB and Ethernet drivers use registry keys to control the NIC operations. The regis-
try keys receive default values during the installation of the Mellanox adapters. Most of the
parameters are visible in the registry by default, however, certain parameters must be created in
order to modify the default behavior of the Mellanox driver.
The adapter can be configured either from the User Interface (Device Manager -> Mellanox
Adapter -> Right click -> Properties) or by setting the registry directly.
All Mellanox adapter parameters are located in the registry under the following registry key:
The registry key can be divided into 4 different groups:
Any registry key that starts with an asterisk ("*") is a well-known registry key. For more details
regarding the registries, please refer to:
http://msdn.microsoft.com/en-us/library/ff570865(v=VS.85).aspx
C.1 Finding the Index Value of the HCA
 To find the nn value of your HCA from the Device Manager please perform the following
steps:
Step 1. Open Device Manager, and go to System devices.
Step 2. Right click -> properties on Mellanox -ConnectX® card.
Step 3. Go to Details tab.
Step 4. Select the Driver key, and obtain the nn number.
In the below example, the index equals 0041
HKEY_LOCAL_MACHINE
\SYSTEM
\CurrentControlSet
\ Control
\ Class
\{4D36E972-E325-11CE-BFC1-08002bE10318}
\<Index>
Group Description
Basic Contains the basic configuration.
Offload Options Controls the offloading operation that the NIC supports.
Performance Options Controls the NIC operation in different environments and scenarios.
Flow Control Options Controls the TCP/IP traffic.