Documentation, Support, and Training
Understanding Switch Specifications
Understanding InfiniBand Cabling
Understanding the Installation
Install the Switch in the Rack
Verifying the InfiniBand Fabric
Administrative Command Overview
Monitoring the InfiniBand Fabric
Controlling the InfiniBand Fabric
Perform Comprehensive Diagnostics for the Entire Fabric
Perform Comprehensive Diagnostics for a Route
Determine Changes to the InfiniBand Fabric Topology
Find 1x or SDR or DDR Links in the Fabric
Determine Which Links Are Experiencing Significant Errors
Controlling the Subnet Manager
Set the Subnet Manager Priority
Start the Subnet Manager With the opensmd Daemon
Stop the Subnet Manager With the opensmd Daemon
Understanding Service Procedures
If your InfiniBand fabric uses the Fat-Tree routing algorithm, you must provide a root node GUID file for the Subnet Manager. The /etc/opensm/guid.txt file is such a file. This procedure describes how to create the guid.txt file.
Type the following command on the management controller to retrieve the node GUID:
# ibstat |grep Node
For example:
# ibstat |grep Node Node GUID: 0x0021283a8638b0f0 #
Start a text editor on the management controller and record the GUID twice.
For example, you would see the following in the text editor:
0x0021283a8638b0f0 0x0021283a8638b0f0
Change the last two digits on the right from f0 to e0 for one of the GUIDs.
For example:
0x0021283a8638b0f0 0x0021283a8638b0e0
Save the text editor file on the management controller as the /etc/opensm/guid.txt file.
Set the permissions for the /etc/opensm/guid.txt file:
# chmod 0644 /etc/opensm/guid.txt #
Switch Reference, opensm command
Switch Reference, getbaseguid command