After starting the Subnet Manager, you can verify that the Link LEDs for cabled links are green. If the Link LED is dark, the link is down. If the Link LED flashes, there are symbol errors.
To check the link status of the cables:
# listlinkup
If the link for a connector is reported as not present, the link at either end of the cable is down. If a port is down, use the enableswitchport 0 portnumber command to bring the port up. Alternatively, use the ibdevreset command to reset the switch chip.
See the Sun Datacenter InfiniBand Switch 36 User's Guide, "Enable a Switch Chip Port" and "Reset the Switch Chip".
After making sure that the link is up, you can verify the InfiniBand fabric.
The following is example output of the listlinkup command:
# listlinkup Connector 0A Present <-> Switch Port 20 up (Enabled) Connector 1A Present <-> Switch Port 22 up (Enabled) Connector 2A Present <-> Switch Port 24 up (Enabled) . . . Connector 15A Not present Connector 0A-ETH Present Bridge-0-1 Port 0A-ETH-1 up (Enabled) Bridge-0-1 Port 0A-ETH-2 up (Enabled) Bridge-0-0 Port 0A-ETH-3 up (Enabled) Bridge-0-0 Port 0A-ETH-4 up (Enabled) Connector 1A-ETH Present Bridge-1-1 Port 1A-ETH-1 up (Enabled) Bridge-1-1 Port 1A-ETH-2 up (Enabled) Bridge-1-0 Port 1A-ETH-3 up (Enabled) Bridge-1-0 Port 1A-ETH-4 up (Enabled) Connector 0B Present <-> Switch Port 19 up (Enabled) Connector 1B Present <-> Switch Port 21 up (Enabled) . . . Connector 15B Not present #