Cisco Catalyst 9600 Series Switches Hardware Installation Guide - Product Overview [Cisco Catalyst 9600 Series Switches] (2024)

To ensure high availability, the system is designed to respond to fan failures by either minimising impact or by compensating and operating at a worst case scenario specification.

• If a single fan fails, the remaining fans in the row compensate with increased speed.

• If two or more fans fail, the entire fan tray operates at full speed after one minute. Further, the fan tray must be replaced. The individual fans are not field replaceable, you must replace the fan tray.

• If the temperature sensor fails or communication with the temperature sensor fails, the worst case operating temperature is assumed.

• If the pressure sensor fails or communication with the pressure sensor fails, the worst case operating pressure is assumed.

Under normal operating conditions, when none of the temperature alarms have been triggered, hardware controls fan speed. If any of the system temperature alarms are triggered, software displays a syslog message indicating that the temperature is high, and the fans are operating at higher speed. Refer to the System Management section of the software configuration guide for more information.

In case of a fan failure, you must replace the fan tray within 120 seconds or power down the system. If the temperature exceeds the shutdown threshold, software powers the system down.

When the fan tray operates at full speed, increased noise levels may be expected. The fan tray may operate at full speed in these circ*mstances:

• If two or more fans have failed

• If the STATUS LED remains red for more than one minute

• If there is a hardware failure

• If the software watchdog timer is triggered

The following are the features supported by a Cisco Catalyst 9600 Series AC power supply module:

• Self-cooling, with a minimum airflow of 17 cubic feet per minute (CFM) at 100 percent load.

• Supports only single-phase source AC. Source AC can be out of phase between multiple power supplies or multiple AC-power plugs on the same power source because all AC power supply inputs are isolated.

• Has a release latch and cord-retention mechanism on the front panel of the module, to avoid accidental removal of the module or the attached power cord.

• Supports redundant and combined configuration modes. A single (non-redundant) or a dual (redundant) power supply configuration, can support the following loads:

  Table 3. Output Power Capacity of AC PSUs at Different Input Voltage

  PID	Input Voltage (VAC)	Output Power in Watts
  C9600-PWR-2KWAC	110VAC	1050W
  	220VAC	2000W
  C9600-PWR-3KWAC	110VAC	1500W
  	220VAC	3000W

Cisco Catalyst 9600 Series Switches offer redundant and combined configuration modes for power supplies. In both the modes, the power supplies will share the load equally.

The number of power supply modules installed and the system load determine the power-level that the system expects to draw from each power supply module and consequently, the power supply mode that will be suitable. For system power budgeting estimates and to determine power supply requirements, use the Cisco Power Calculator.

To configure a power supply mode, enter the power redundancy-mode command in global configuration mode. If you do not configure a mode, the default mode applies.

Combined Mode

This is the default power supply mode.

The system operates with one to four power supply modules. The power available to the system is the sum of power outputs of all the power supply modules in the chassis multiplied by the share ratio. All available power supply modules are active and sharing power, and can operate at up to 100 percent capacity. Additional power supply units operate at 97 percent capacity. In combined mode, you can use a combination of AC and DC power supplies provided the AC input voltage is 220V and that the power supplies are of equal wattage. However, you cannot combine two AC power supplies of 110V input and 220V input.

Total combined mode power = P + (N-1) * P * (share ratio)

where P = Power output of one of the power supply units and N is the number of power supply modules used.

Note	In case of failure in the combined mode, each operational power supply increases its output. If the output power does not meet system requirements, then all the operational power supply modules may be overloaded and go into overcurrent shutdown. All system power is then lost.

The following table provides details about the power output in combined mode:

Table 4. Power Output in Combined Mode

PID	Input voltage	One Power Supply	Two Power Supplies	Three Power Supplies	Four Power Supplies
C9600-PWR-2KWAC	110V	1050W	2040W	3030W	4020W
	220V	2000W	3940W	5880W	7820W
C9600-PWR-3KWAC	110V	1500W	2955W	4410W	5865W
	220V	3000W	5910W	8820W	11730W