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After the IPL of the CEC FSPs is complete, they are in a power off state. The administrator
also needs to validate that CNM includes proper access to the CEC FSPs and frame BPAs
from the xCAT EMS. Verify that there are proper hardware server connections by issuing the
lshwconn command by using the fnm tool type, as shown in Example 5-10. Confirm that every
frame BPA and CEC FSP are listed in the command output.
Example 5-10 Verifying the hardware server connections
$ lshwconn frame -T fnm
$ lshwconn cec –T fnm
Another CNM task is to ensure that the HFI master ISR identifier is properly loaded on the
CEC FSPs. This task is accomplished by using the CNM commands lsnwloc and
lsnwcomponents to show the CNM HFI drawer status information. If required, the administrator
might need to execute the chnwsvrconfig command to load in the HFI master ISR identifier
into the CEC FSPs, as shown in Example 5-11.
Example 5-11 Showing the CNM HFI drawer status information
$ lsnwloc
$ lsnwcomponents
$ chnwsvrconfig -f 17 -c 3 (Configures one cec in P775 frame 17 with cage id 3)
CEC power on to standby
After the frames BPAs and the CECs FSPs are booted, we bring the CEC to on standby state.
This state powers on the CECs, but does not autostart the power to the LPARs. This
configuration is required because we need to coordinate the powering on of selected xCAT
service nodes, and GPFS I/O server nodes before powering on the compute nodes. To power
on the CECs to on standby state, issue the command that is shown in Example 5-12.
Example 5-12 Powering on the CECs to standby state
$ rpower cec onstandby
CEC power on monitoring and verification
There are multiple tasks that are monitored by the administrator. These tasks include
checking the CEC LCDs by using the rvitals command, and tracking the CEC status by
using the rpower command. It is a good time for the administrator to validate the CNM ISR
network environment with the CNM commands lsnwloc and lsnwcomponents during the
powering on of CECs.
CEC power-on: The CEC power-on is one of the largest time-consuming steps in the start
process because each CEC is performing all of the hardware verification of the server
during this process. The current timings that we observed take approximately 45 - 70
minutes for the CEC to become available.
The CEC IPL process is monitored by using the xCAT rvitals and rpower commands, as
shown in Example 5-13.
Example 5-13 CEC IPL process monitoring
$ rvitals cec lcds
$ rpower cec state
Chapter 5. Maintenance and serviceability
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