User Manual

Chapter 4 - Operation and Administration Using the CLI NPU Configuration
4Motion 431 System Manual
Figure 4-1: 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 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.
Table 4-24: Active AU-to-PSU Ratio
If the number of Active
AUs is...
Number of active PSUs
should be...
Number of Active PIU
1-4 2 1
5-7 3 1
Command
Syntax
npu(config)# enable
{PSU | PIU} <slot id>
npu(config)# disable {PSU | PIU} <slot id>