15.2.5 Disable a Port
If a port is found to be problematic due to a bad cable connection or a physical damage
to the connectors, you can disable the port.
On the command-line interface (CLI), run the following command:
# disableswitchport [--reason=reason] connector|ibdev port
where reason is the reason for disabling the port, Blacklist or Partition.
connector is the number of the QSFP connector (0A–15B). ibdev is the InfiniBand
device name (Switch, Bridge-0-0, Bridge-0-1, Bridge-1-0, Bridge-1-1). port is the
number of the port (1–36).
This hardware command disables a QSFP connector and port on the switch chip or a
port on the BridgeX chips. The command addresses either the connector or the port on
the switch chip or the BridgeX port.
The --reason option enables you to use a passphrase to lock the state of the port:
• Blacklist – A connector and port pair are identified as being inaccessible
because of unreliable operation.
• Partition – A connector and port pair are identified as being isolated from the
InfiniBand fabric.
Both the Blacklist and Partition passphrases survive reboot. You unlock these
passphrases using the enableswitchport command with the --reason option.
Note:
State changes made with the ibportstate command are not recognized by
the disableswitchport, enableswitchport, or listlinkup
commands.
The following example shows how to disable and blacklist connector 14A with the
disableswitchport command.:
# disableswitchport --reason=Blacklist 14A
Disable Switch port 7 reason: Blacklist
Initial PortInfo:
# Port info: DR path slid 65535; dlid 65535; 0 port 7
LinkState:.......................Down
PhysLinkState:...................Polling
LinkWidthSupported:..............1X or 4X
LinkWidthEnabled:................1X or 4X
LinkWidthActive:.................4X
LinkSpeedSupported:..............2.5 Gbps or 5.0 Gbps or 10.0 Gbps
LinkSpeedEnabled:................2.5 Gbps or 5.0 Gbps or 10.0 Gbps
LinkSpeedActive:.................2.5 Gbps
After PortInfo set:
# Port info: DR path slid 65535; dlid 65535; 0 port 7
LinkState:.......................Down
PhysLinkState:...................Disabled
#
Control the InfiniBand Fabric
Monitor and Control the InfiniBand Fabric 15-13
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