Enter the show environment [all | counters | history | location | sensor | status | summary | table] command to display system status information. Keyword descriptions are listed in the following table.

Supervisor modules and their associated line cards support multiple temperature sensors per card. The environment condition output includes the temperature reading from each sensor and the temperature thresholds for each sensor. These line cards support three thresholds: warning, critical, and shutdown.

The following example illustrates how to display the environment condition on a supervisor module. The thresholds appear within parentheses.

Device# show environment 

Number of Critical alarms:  0
Number of Major alarms:     0
Number of Minor alarms:     0

Slot    Sensor       Current State       Reading    Threshold(Minor,Major,Critical,Shutdown)
----    ------       -------------       -------    ---------------------------------------
 R0    HotSwap: Volts   Normal           53    V DC   	na
 R0    HotSwap: Power   Normal           231   Watts  	na
 R0    Temp: Coretemp   Normal           46    Celsius	(107,117,123,125)(Celsius)
 R0    Temp: DopplerD   Normal           55    Celsius	(107,117,123,125)(Celsius)
 R0    V1: VX1          Normal           845   mV     	na
 R0    V1: VX2          Normal           1499  mV     	na
 R0    V1: VX3          Normal           1058  mV     	na
 R0    V1: VX4          Normal           849   mV     	na
 R0    V1: VX5          Normal           1517  mV     	na
 R0    V1: VX6          Normal           1306  mV     	na
 R0    V1: VX7          Normal           1007  mV     	na
 R0    V1: VX8          Normal           1098  mV     	na
 R0    V1: VX9          Normal           1205  mV     	na
 R0    V1: VX10         Normal           1704  mV     	na
 R0    V1: VX11         Normal           1208  mV     	na
 R0    V1: VX12         Normal           1804  mV     	na
 R0    V1: VX13         Normal           2518  mV     	na
 R0    V1: VX14         Normal           3288  mV     	na
 R0    Temp:   outlet   Normal           39    Celsius	(55 ,65 ,75 ,100)(Celsius)
 R0    Temp:    inlet   Normal           35    Celsius	(45 ,55 ,65 ,72 )(Celsius)

The following example illustrates how to display the LED status on a supervisor module.

Device# show hardware led

Current Mode: STATUS

SWITCH: C9407R
SYSTEM: AMBER

SUPERVISOR: ACTIVE 
STATUS: (10) Te3/0/1:BLACK Te3/0/2:BLACK Te3/0/3:BLACK Te3/0/4:BLACK Te3/0/5:BLACK Te3/0/6:BLACK Te3/0/7:BLACK Te3/0/8:BLACK Fo3/0/9:BLACK Fo3/0/10:BLACK 
BEACON: BLACK

RJ45 CONSOLE: GREEN
FANTRAY STATUS: GREEN
FANTRAY BEACON: BLACK
POWER-SUPPLY 1 BEACON: BLACK
POWER-SUPPLY 3 BEACON: BLACK

The OBFL feature records operating temperatures, hardware uptime, interrupts, and other important events and messages that can assist with diagnosing problems with line cards and supervisor modules installed in a switch. Data is logged to files stored in nonvolatile memory. When the onboard hardware is started up, a first record is made for each area monitored and becomes a base value for subsequent records. The OBFL feature provides a circular updating scheme for collecting continuous records and archiving older (historical) records, ensuring accurate data about the system. Data is recorded in one of two formats: continuous information that displays a snapshot of measurements and samples in a continuous file, and summary information that provides details about the data being collected. The data is displayed using the show logging onboard command. The message “No historical data to display” is seen when historical data is not available.

Device# show logging onboard RP active voltage detail

--------------------------------------------------------------------------------
VOLTAGE SUMMARY INFORMATION
--------------------------------------------------------------------------------
Number of sensors          : 16
--------------------------------------------------------------------------------
Sensor                    ID         Normal Range          Maximum Sensor Value 
--------------------------------------------------------------------------------
SYSTEM Rail-5.0           0          0 - 5                 0                    
SYSTEM Rail-0.9PEX        1          0 - 5                 1                    
SYSTEM Rail-0.9           2          0 - 5                 1                    
SYSTEM Rail-1.8           3          0 - 5                 0                    
SYSTEM Rail-3.3           4          0 - 5                 1                    
SYSTEM Rail-2.5           5          0 - 5                 1                    
SYSTEM Rail-1.5CPU        6          0 - 5                 1                    
SYSTEM Rail-1.5           7          0 - 5                 1                    
SYSTEM Rail-1.2           8          0 - 5                 1                    
SYSTEM Rail-1.1           9          0 - 5                 1                    
SYSTEM Rail-1.0           10         0 - 5                 1                    
SYSTEM Rail-0.9CPU        11         0 - 5                 1                    
SYSTEM Rail-0.85          12         0 - 5                 2                    
SYSTEM Rail-0.85DOPv
     13         0 - 5                 3                    
SYSTEM Rail-0.85DOPv^N     14         0 - 5                 5                    
SYSTEM Rail-0.85DOPv^O     15         0 - 5                 0                    

--------------------------------------------------------------------------------
Sensor Value
Total Time of each Sensor
--------------------------------------------------------------------------------

--------------------------------------------------------------------------------
No historical data

--------------------------------------------------------------------------------


--------------------------------------------------------------------------------
VOLTAGE CONTINUOUS INFORMATION
--------------------------------------------------------------------------------
Sensor                    ID
--------------------------------------------------------------------------------

SYSTEM Rail-5.0           0  
SYSTEM Rail-0.9PEX        1  
SYSTEM Rail-0.9           2  
SYSTEM Rail-1.8           3  
SYSTEM Rail-3.3           4  
SYSTEM Rail-2.5           5  
SYSTEM Rail-1.5CPU        6  
SYSTEM Rail-1.5           7  
SYSTEM Rail-1.2           8  
SYSTEM Rail-1.1           9  
SYSTEM Rail-1.0           10 
SYSTEM Rail-0.9CPU        11 
SYSTEM Rail-0.85          12 
SYSTEM Rail-0.85DOPv
     13 
SYSTEM Rail-0.85DOPv^N     14 
SYSTEM Rail-0.85DOPv^O     15 
--------------------------------------------------------------------------------
       Time Stamp   | Sensor Voltage 0V     
MM/DD/YYYY HH:MM:SS | Sensor Value 
--------------------------------------------------------------------------------
05/06/2015 16:42:51  0  1  1  0  1  1  1  1  1  1  1  1  2  3  5  0 
05/06/2015 18:24:24  0  1  1  0  1  1  1  1  1  1  1  1  2  3  5  0 
05/10/2015 17:53:42  0  1  1  0  1  1  1  1  1  1  1  1  2  3  5  0 
08/30/2017 16:14:40  0  1  1  0  1  1  1  1  1  1  1  1  2  3  5  0 
08/30/2017 23:34:24  0  1  1  0  1  1  1  1  1  1  1  1  2  3  5  0 
08/31/2017 22:16:23  0  1  1  0  1  1  1  1  1  1  1  1  2  3  5  0 
09/01/2017 00:57:15  0  1  1  0  1  1  1  1  1  1  1  1  2  3  5  0 

--------------------------------------------------------------------------------

The chassis can power down a single card, providing a detailed response to over-temperature conditions on line cards. However, the chassis cannot safely operate when the temperature of the supervisor module itself exceeds the critical threshold. The supervisor module turns off the chassis’ power supplies to protect itself from overheating. When this happens, you can recover the switch only by cycling the power on and off switches on the power supplies or by cycling the AC or DC inputs to the power supplies.

Critical and shutdown temperature emergencies trigger the same action. The following table lists temperatureemergencies but does not distinguish between critical and shutdown emergencies.

Any system has two types of alarms: major and minor. A major alarm indicates a critical problem that could lead to system shutdown. A minor alarm is informational—it alerts you to a problem that could become critical if corrective action is not taken.

The following table lists the possible environment alarms.

Fan failure alarms are issued as soon as the fan failure condition is detected and are canceled when the fan failure condition clears. Temperature alarms are issued as soon as the temperature reaches the threshold temperature. An LED on the supervisor module indicates whether an alarm has been issued.

When the system issues a major alarm, it starts a timer whose duration depends on the alarm. If the alarm is not canceled before the timer expires, the system takes emergency action to protect itself from the effects of overheating. The timer values and the emergency actions depend on the type of supervisor module.

Note	Refer to the Hardware Installation Guide for information on LEDs, including the startup behavior of the supervisor module system LED.

Cisco Catalyst 9400 Series Switches offer combined and redundant configuration modes for power supplies.

The operating state refers to the system’s capacity to respond to a situation where all active power supply modules fail. The system deems the chassis operating state as full protected, normal protected, or combined depending on these factors:

• Total active output power, which is the total output power that is available from all the active power supply modules in the chassis.

• Required budgeted power, which is the power the system requires only for the supervisor modules, switching modules (line cards), and fan tray to operate in the chassis.

  In the show command outputs (show power , show power detail ), this is displayed as System Power.

• Total standby output power, which is the total output power that is available from all the power supply modules in the chassis that are configured as standby.

Whether in the n+1 or n+n mode, the system considers the chassis in a full protected state, when ALL of these conditions are met:

• Total active output power is greater than the required budgeted power

• Total standby output power is greater than or equal to total active output power

Whether in the n+1 or n+n mode, the system considers the chassis in a normal protected state, when ALL of these conditions are met:

• Total active output power is greater than the required budgeted power

• Total standby output power is lesser than the total active output power

The system operates in a combined state, when it encounters these conditions (any redundancy configuration is rejected):

• Total active output power is lesser than the required budgeted power

• A standby power supply module is not configured or installed.

Device# show power
Power        Model No             Type  Capacity   Status        1    2    3    4
Supply
------       -------------------- ----  --------  ------------  -----------------------
PS1          C9400-PWR-3200AC      AC   3200 W    active        good good good good
PS2          C9400-PWR-3200AC      AC   3200 W    active        good good good good
PS7          C9400-PWR-3200AC      AC   3200 W    standby       n.a. n.a. n.a. n.a.
PS8          C9400-PWR-3200AC      AC   3200 W    standby       n.a. n.a. n.a. n.a.

PS Current Configuration Mode: N+N redundant
PS Current Operating State: Full protected

Power supplies currently active: 2
Power supplies currently available: 3
Power Summary  Maximum
(in Watts)     Used     Available
-------------  ------   --------
System Power   2115     2115
Inline Power   3185     4285 
-------------  ------   ---------
Total          5300     6400
Automatic Linecard Shutdown: Enabled
Power Budget Mode          : Dual Sup

<output truncated>

Auto line card shutdown or autoLC, is disabled by default. This feature allows you to configure line card power priority. It enables hardware to automatically shut down least priority line cards in power constraint mode until the total available active power becomes greater than or equal to the total used power displayed in the power summary of the show power command. This feature provides deterministic behavior of the switch in case of power supply failure events and prioritized line card shutdown events.

Configure the autoLC shutdown feature and line card power priority by using the power supply autoLC [ priority physical-slot-number ] [ shutdown] command in global configuration mode.

Verify the configured priority and autoLC information by using the show power module command in privileged EXEC mode.

When your switch is configured to combined mode, the total available power in not the mathematical sum of the individual power supplies. The power supplies have a sharing ratio predetermined by the hardware. In combined mode, the total power available is P + (P * sharing-ratio), where P is the amount of power in the power supply.

The examples in this section illustrate different power supply setups. They describe how the Power Supply Module Installation Considerations in the Cisco Catalyst 9400 Series Switches Hardware Installation Guide and the Operating States section in this document affect possible power supply mode configurations. Both combined and redundant power supply modes, and the resulting operating states are covered.