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Managing the Switch
Module Terms
sup-local and sup-remote
Overview of Power Modes
You can configure the power modes to either use the combined power that is provided by the installed power
supply units (no power redundancy) or to provide power redundancy for when there is a power loss:
Combined mode
n+1 redundancy mode
n+n redundancy mode
Usage
Relative
This mode allocates the combined power of all power supplies to active power for switch operations.
This mode does not allocate reserve power for power redundancy in case of power outages or power
supply failures.
This mode allocates one power supply as a reserve power supply in case an available power supply fails.
The remaining power supplies are allocated for available power. The reserve power supply must be at
least as powerful as each power supply used for the available power.
For example, if a switch requires 2.0 kW of available power and the switch has two power supplies that
each output 3 kW, then one of the power supplies provides 3.0 kW of available power and one power
supply provides 3.0 kW of reserve power in case the other power supply fails.
This mode allocates half of the power to available power and the other half to reserve power. Use a
different power source for the active and reserve power sources. So that if the power source that is used
for active power fails, the reserve power supply can provide power for the switch.
For example, if the switch requires 4.0 kW of power, the switch has four power supplies that each output
3 kW. If you have two power grids, you use grid A to power two 3-kW power supplies that provide the
available power for the switch. And You use grid B to power the other two 3-kW power supplies that
provide the reserve power in case grid A fails.
Description
If you are logged into the active supervisor, the following
applies:
• sup-local refers to the active supervisor module.
• sup-remote refers to the standby supervisor module.
If you are logged into the standby supervisor, the following
applies:
• sup-local refers to the standby supervisor module (the
one that you are logged into).
• There is no sup-remote available from the standby
supervisor module (you cannot access a file system on
the active supervisor).
Cisco Nexus 9516 NX-OS Mode Switch Hardware Installation Guide
Overview of Power Modes
53
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