Oracle Exalogic Elastic Cloud, Owner'S Manual

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• Enable Subnet Manager on a Switch
• Disable Subnet Manager on a Switch
13.2.3 Monitor the Subnet Manager
This section contains the following topics:
• Display the Subnet Manager Status
• Display Recent Subnet Manager Activity
13.2.3.1 Display the Subnet Manager Status
If you want to quickly determine your Subnet Manager's priority and state, you can
use the
sminfo
command.
On the command-line interface (CLI), run the following command:
# sminfo
The output is displayed, as in the following example:
sminfo: sm lid 15 sm guid 0x21283a8389a0a0, activity count 32046 priority 8 state3
SMINFO_MASTER
In the example output, the Subnet Manager's hosting HCA has LID 15 and GUID
0x21283a8620b0f0. The Subnet Manager has a priority of 8 (high) and its state is 3
(master).
13.2.3.2 Display Recent Subnet Manager Activity
On the command-line interface (CLI), run the following command:
# getmaster -l
The output is displayed, as in the following example:
# getmaster -l
Last ring buffer history listed:
whereismaster-daemon is running
20091204 15:00:53 whereismaster started
20091204 15:00:55 No OpenSM Master seen in the system
20091204 15:06:19 OpenSM Master on Switch : 0x0002c9000100d050 ports 36 Sun DCS
36 QDR switch o4nm2-36p-2.norway.test.com enhanced port 0 lid 7 lmc 0
13.2.4 Control the Subnet Manager
This section contains the following topics:
• Identify the Location of Master Subnet Manager
• Relocate the Master Subnet Manager
• Enable Subnet Manager on a Switch
• Disable Subnet Manager on a Switch
13.2.4.1 Identify the Location of Master Subnet Manager
From any InfiniBand switch in the network (leaf switch or spine switch), log in as
root
and run the
getmaster
command to obtain the location of the master SM as
follows:
Manage InfiniBand Network Using Subnet Manager
13-4 Oracle Exalogic Elastic Cloud Machine Owner's Guide