Powering on managed systems after a power outage when your HMC is configured as a DHCP server

Learn how to correctly power on your managed systems after a power outage when your HMC is configured as a Dynamic Host Configuration Protocol (DHCP) server.

1. Choose from the following options:
   • If the location's main power has not been restored, go to step 2.
   • If the location's main power has been restored, perform the following steps:
     1. Allow the servers and HMC to power on completely.
     2. Log on to the HMC interface.
     3. Continue with step 5.
2. Perform an Emergency Power Off (EPO) procedure on the servers. This can be completed in the following ways:
   • Using the ASMI. For details, see Performing an immediate power off .
   • Flipping the EPO switch on your managed system’s Operator panel.
3. After the location's main power has been restored, power on the HMC.
4. After the HMC powers on and you have logged on to the HMC interface, restore base power to the managed systems by turning on the EPO switches on the managed systems.
5. Verify that the managed systems are powered on to the correct operating state.
   1. In the Navigation area on the HMC interface, click Server and Partition.
   2. In the Navigation area, select Frame Management.
   3. In the Contents area, verify that the virtual operator panel displays Standby/Standby for each frame managed by your HMC.
   4. In the Navigation area, select Server Management. The managed systems power on to the last state they were in when power was lost.
   5. In the Contents area, verify that the virtual operator panel displays the correct operating state.
      Note: For more information about other managed system operating states, see Managed system states.
6. Perform the following actions as necessary:
   • If your HMC is configured as a DHCP server, perform the actions listed in Verifying that your HMC DHCP private network is configured correctly.
   • If the virtual operator panel displays Version Mismatch in the Contents area, the HMC most likely has an IP connection identified as a one type of IP address, when in actuality the IP is communicating with another type of IP address. If Version Mismatch displays in the virtual operator panel, contact your next level of support for assistance.
   • If the system did not power on automatically, power on the managed system from the HMC. For more information, see Powering on a managed system.
7. Verify that I/O is assigned correctly.
   1. In the Contents area, right-click the frame and select Properties.
   2. In the Properties window, click the I/O Units tab.
   3. Ensure that the I/O locations are correct by comparing the physical location code of the I/O unit on the left with the managed system serial number on the right.
8. Choose from the following options:
   • If the I/O units are assigned correctly, your managed systems are powered on and ready for use.
   • If the I/O units are assigned to an incorrect managed system, you have a network communication problem. Contact your next level of support for assistance.