User's Manual

Chapter 3 - Operation and Administration Using the CLI NPU Configuration
4Motion 381 System Manual
Run the following command to enable/disable the PSU/PIU modules:
npu(config)# enable {PSU | PIU} <slot id>
npu(config)# disable {PSU | PIU} <slot id>
Specify the slot ID of the PSU or PIU to be enabled. The following figure depicts the
slot ID of the 4Motion shelf components:
Figure 3-1: Slot IDs of Shelf Components
For example, if you want to enable PSU, slot# 3, and disable the PIU, slot# 1, run
the following command:
npu(config)# enable PSU 3
npu(config)# disable PIU 1
Remember that a minimum AU-to-PSU/PIU ratio should always be maintained.
The following table lists the required active AU-to-PSU ratio. Before disabling the
PSU module, ensure that this ratio is maintained.
IMPORTANT
An alarm is raised if you enable a PSU or PIU that is already powered down, or you disable a PSU
or PIU that is already powered up.
IMPORTANT
An error may occur if you specify a PSU slot ID that is not in the range, 1-4, or a PIU slot ID that is
not in the range 1-2.
IMPORTANT
Ensure that the NPU to PSU/PIU ratio is also maintained. At least one PSU and PIU should always
be active to support the NPU.