Powering Off an Existing QFabric Node Device
Use this procedure to gracefully shut down an existing device in a server Node group, redundant server Node group, or network Node group. This orderly process reduces traffic loss on server Node devices and prevents traffic loss on redundant server Node devices and network member devices.
Do not use the request system halt command
to shut down an existing Node device or traffic loss can occur.
- Log into the QFabric default partition on the Director
device and start the CLI.
[root@dg0] # cli
- Discover the device connection status and the alias name
(identifier) by issuing the
show fabric administration inventorycommand.user@qfabric> show fabric administration inventory Item Identifier Connection Configuration Node group NW-NG-0 Connected Configured P5502-C Disconnected P5502-C Disconnected P8189-C Connected Configured P8189-C Connected TA3713470056 Disconnected TA3713470056 Disconnected TR0214080017 Disconnected TR0214080017 Disconnected Interconnect device IC-TB3713490033 Connected Configured TB3713490033/RE0 Connected IC-TB3714010454 Connected Configured TB3714010454/RE0 Connected Fabric manager FM-0 Connected Configured Fabric control FC-0 Connected Configured FC-1 Connected Configured Diagnostic routing engine DRE-0 Connected Configured Director group 0281022011000011 Connected 0281032012000018 ConnectedThe Node device must show as
connectedandconfiguredto have an orderly shutdown. - Start the orderly shutdown of the Node device by issuing
the
request fabric power-off node-deviceoperational mode command from the QFabric default partition CLI. This command systematically takes the node offline and gracefully shuts down the device while preserving system state information. A message appears on the console or console log, confirming that the operating system has stopped on the device.You see the following output after entering the command:
root@qfabric> request fabric administration power-off node-device ED1491 STEP 1 of 8 (Acquiring lock): Acquiring lock to perform this operation Acquired lock to perform this operation STEP 2 of 8 (Performing pre-checks): node-device ED1491 is online STEP 3 of 8 (Mastership switch-over): node-device ED1491 is Server Node-group STEP 4 of 8 (Gracefully offlining the node-device): node-device is being offlined node-device is successfully offlined STEP 5 of 8 (Waiting for convergence): Waiting for convergence(this will take few minutes) Convergence complete STEP 6 of 8 (Powering-off the node-device): Now, powering-off the node-device Powered-off the node-device STEP 7 of 8 (Updating inventory): Removing the node-device - ED1491 from inventory node-device - ED1491 is removed from inventory STEP 8 of 8 (Releasing lock): Releasing the lock root@qfabric>
CAUTION:The final output of the
request fabric power-off node-devicecommand is the following message:The device is shutting down and can be removed when the LCDs are off. Wait at least 3 to 4 minutes after first seeing this message before following the instructions in Step 5 and Step 6 to disconnect the switch. - Attach the grounding strap to your bare wrist and to a site ESD point.
- Disconnect power to the switch by performing one of the
following tasks:
AC power supply—If the AC power source outlet has a power switch, set it to the OFF (O) position. If the AC power source outlet does not have a power switch, gently pull out the plug end of the power cord connected to the power source outlet.
DC power supply—Switch the circuit breaker on the panel board that services the DC circuit to the OFF position.
- Remove the power source cable from the power supply faceplate:
AC power supply—Remove the power cord from the power supply faceplate by detaching the power cord retainer and gently pulling out the socket end of the power cord connected to the power supply faceplate.
DC power supply—Remove the screws securing the ring lugs attached to the power source cables to the power supply using the screwdriver, and remove the power source cables from the power supply. Replace the screws on the terminals and tighten them.