Create the guid.txt File

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.

1. Type the following command on the management controller to retrieve the node GUID:

   # ibstat |grep Node

   For example:

   # ibstat |grep Node
            Node GUID: 0x0021283a8638b0f0
   #

2. 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

3. Change the last two digits on the right from f0 to e0 for one of the GUIDs.

   For example:

   0x0021283a8638b0f0
   0x0021283a8638b0e0

4. Save the text editor file on the management controller as the /etc/opensm/guid.txt file.

5. Set the permissions for the /etc/opensm/guid.txt file:

   # chmod 0644 /etc/opensm/guid.txt
   #

Related Information

• Switch Reference, opensm command

• Switch Reference, getbaseguid command

• Create the opensm.conf File

• Enable the Subnet Manager

• Start the Subnet Manager With the opensmd Daemon