SupportDocumentationSwitchesCampus SwitchS7700&S8700&S9700&S12700&S16700Reference GuidesCommand Reference

CloudEngine S8700 V600R022C00 Command Reference

PoE Configuration Commands

PoE Configuration Commands

display poe device

Function

The display poe device command displays information about the device supporting Power over Ethernet (PoE).

Format

display poe device { all | chassis chassis-id }

display poe device

Parameters

Parameter Description Value
all

Displays whether all devices support PoE in a CSS.

-
chassis chassis-id

Displays whether the specified device supports PoE in a CSS.

The value can be 1 or 2.

Views

All views

Default Level

1: Monitoring level

Usage Guidelines

Before using the PoE function, you can run the display poe device command to check the slots that support the PoE function. If the command output is displayed, the device supports the PoE function.

Example

The actual command output varies according to the device. The command output here is only an example.

# Display information about the device supporting PoE.
<HUAWEI> display poe device
Slot 1 : PoE
Table 2-106 Description of the display poe device command output
Item Description
Slot

The board in the slot supports PoE.

display poe information

Function

The display poe information command displays PoE running information about the device.

Format

display poe information [ slot slot-id ]

display poe information { all | chassis chassis-id }

Parameters

Parameter Description Value
slot slot-id

Displays the PoE running information in a specified slot ID.

If this parameter is not specified, the PoE information about all boards is displayed.

Set the value according to the device configuration.
all

Displays PoE running information in all slots.

-
chassis chassis-id

Displays PoE running information in all slots of a specified device.

The value can be 1 or 2.

Views

All views

Default Level

1: Monitoring level

Usage Guidelines

The command output includes the configured maximum power, current power consumption, peak power consumption, and total reference power.

Example

The actual command output varies according to the device. The command output here is only an example.

# Display the PoE running information about the device. (The actual output information may differ from the following information.)
<HUAWEI> display poe information
PSE Information of slot 1:                                                                                                          
    Power Max Value(mW)        : 2880000                                                                                            
    Power Current Value(mW)    : 8700                                                                                               
    Power Peak Value(mW)       : 10800                                                                                              
    Total Reference Power(mW)  : 45400                                                                                              
    Allocated Power(mW)        : 2880000
Table 2-107 Description of the display poe information command output
Item Description
Power Max Value(mW)

Maximum power configured for a slot.

To configure this parameter, run the poe max-power command.
Power Current Value(mW)

Current power consumption of a slot.
Power Peak Value(mW)

Peak power consumption of a slot.
Total Reference Power(mW)

Total reference power of all loads in a slot.
Allocated Power(mW)

Available power of a slot.

display poe power

Function

The display poe power command displays current power information on interfaces.

Format

display poe power { slot slot-id | interface { interface-type interface-number | interface-name } }

Parameters

Parameter Description Value
slot slot-id

Displays the PoE power information in a specified slot ID.

Set the value according to the device configuration.
interface interface-type interface-number

Displays the PoE power information about a specified interface.

  • interface-type specifies the interface type.
  • interface-number specifies the interface number.

-
interface-name
  • interface-name specifies the name of an interface.

-

Views

All views

Default Level

1: Monitoring level

Usage Guidelines

The display poe power command displays interface information, including the actual power, class of the powered device (PD) connected to the interface, reference power of the PD, maximum output power of the interface, and average power of the PD.

If an interface connects to a non-standard PD, the interface supplies power to the PD based on class 0 (15400 mW). In this case, when you run this command to view the interface power, the PD class is displayed as 0.

Example

The actual command output varies according to the device. The command output here is only an example.

# Display the power information of interfaces in the specified slot.
<HUAWEI> display poe power slot 1
Codes: REFPW(Reference power), USMPW(User set max power),
       CURPW(Current power), PKPW(Peak power), AVGPW(Average power)
--------------------------------------------------------------------------------
PortName               Class  REFPW(mW)  USMPW(mW)  CURPW(mW)  PKPW(mW)   AVGPW(mW)
--------------------------------------------------------------------------------
MultiGE1/0/0                0      15400      60000      4300       6300       4300
MultiGE1/0/1                0      0          60000      0          0          0
MultiGE1/0/2                0      0          60000      0          0          0
MultiGE1/0/3                0      0          60000      0          0          0
MultiGE1/0/4                4      30000      60000      4600       5700       4313
...
# Display the power of the interface.
<HUAWEI> display poe power interface MultiGE 1/0/1
PortName: MultiGE1/0/1                                                                                                                   
    PD power(mW)            : 4400                                                                                                  
    PD class                : 0                                                                                                     
    PD reference power(mW)  : 15400                                                                                                 
    user set max power(mW)  : 60000                                                                                                 
    PD peak power(mW)       : 6300                                                                                                  
    PD average power(mW)    : 4310
Table 2-108 Description of the display poe power command output
Item Description
PortName

Interface name.
Class

Class of a PD on an interface.

The system classifies PDs into nine classes, namely, class 0 to class 8, according to their maximum power. If no PD is connected to interface, "-" is displayed.
REFPW(mW)

Reference power of a PD.

The system can identify the reference power of each PD. The value varies according to types of PDs.
USMPW(mW)

Maximum output power set for an interface.

To set the value, run the poe power command.
CURPW(mW)

Current power of the PDs on an interface.
PKPW(mW)

Peak power of the PDs on an interface.

The value is a statistical value, which equals the current maximum power consumption of the PDs on the interface.
AVGPW(mW)

Average power of the PDs on an interface.

The value is a statistical value, which equals the average power consumption from the power-on of the interface till now.
PD power(mW)

Output power of an interface.
PD class

Class of a PD on an interface.

The system classifies PDs into nine classes, namely, class 0 to class 8, according to their maximum power.
PD reference power(mW)

Reference power of a PD.

The system can identify the reference power of each PD. The value varies according to types of PDs.
PD peak power(mW)

Peak power of the PDs on an interface.

The value is a statistical value, which equals the current maximum power consumption of the PDs on the interface.
PD average power(mW)

Average power of the PDs on an interface.

The value is a statistical value, which equals the average power consumption from the power-on of the interface till now.
user set max power(mW)

Maximum output power set for an interface.

To set the value, run the poe power command.

display poe power-state

Function

The display poe power-state command displays the PoE power supply status of a device.

Format

display poe power-state { slot slot-id | interface { interface-type interface-number | interface-name } }

Parameters

Parameter Description Value
slot slot-id

Displays the PoE power supply status of a specified slot ID.

Set the value according to the device configuration.
interface interface-type interface-number

Displays the PoE power supply status of a specified interface:

  • interface-type specifies the interface type.
  • interface-number specifies the interface number.

-
interface-name
  • interface-name specifies the name of an interface.

-

Views

All views

Default Level

1: Monitoring level

Usage Guidelines

The display poe power-state command displays information including whether an interface is enabled to check compatibility of non-standard PDs, power supply status on of an interface, class of PDs on an interface, power supply priority, and maximum output power of an interface.

Example

The actual command output varies according to the device. The command output here is only an example.

# Display the PoE power supply status of the interface.
<HUAWEI> display poe power-state interface MultiGE 1/0/1
PortName: MultiGE1/0/1                                                                                                                   
    Port legacy detect        : disable                                                                                             
    Port power enabled        : enable                                                                                              
    Port fast-on              : disable
    Port single-class         : disable                                                                                             
    Port power-up mode        : af-inrush                                                                                           
    Port power-on delay(s)    : 0                                                                                                   
    Port power ON/OFF         : on                                                                                                  
    Port power priority       : low                                                                                                 
    Port power status         : powering                                                                                            
    PD class                  : 0                                                                                                   
    PD power auto-neg         : disable                                                                                             
    PD power-up mode          : -                                                                                                   
    PD support mode           : -                                                                                                   
    Port reference power(mW)  : 15400                                                                                               
    Port max power(mW)        : 60000                                                                                               
    Port current power(mW)    : 3300                                                                                                
    Port peak power(mW)       : 6000                                                                                                
    Port average power(mW)    : 4253                                                                                                
    Port current(mA)          : 61                                                                                                  
    Port voltage(V)           : 55
# Display the PoE power supply status of a specified slot.
<HUAWEI> display poe power-state slot 3
--------------------------------------------------------------------------------
PortName               PowerOn/Off  Enabled    FAST-ON    Priority   Status
--------------------------------------------------------------------------------
MultiGE3/0/1           off          enable     disable    low        detecting
MultiGE3/0/2           off          enable     disable    low        detecting
MultiGE3/0/3           off          enable     disable    low        detecting
MultiGE3/0/4           off          enable     disable    low        detecting
Table 2-109 Description of the display poe power-state command output
Item Description
Port legacy detect

Whether an interface is enabled to check compatibility of non-standard PDs.

To enable an interface to check compatibility of non-standard PDs, run the poe legacy enable command.
Port power enabled

Whether PoE is enabled on an interface.

To enable PoE on an interface, run the poe enable command.
Port power-up mode

Power supply mode of an interface.

To configure this parameter, run the poe { af-inrush | at-inrush | bt-inrush } enable command. If this field displays -, the interface does not support this configuration.
Port power-on delay(s)

Power supply delay of the interface, in seconds. The value 0 indicates no delay.

To configure this parameter, run the poe power-on delay command.
Port power ON/OFF

Whether the interface is powered on:

  • on: The interface is supplying power.
  • off: No power is supplied.
Port power status

Power supply status of an interface:

  • detecting: It indicates the detecting state.
  • disabled: The PoE function is disabled on the interface.
  • chip-fault: The port is faulty due to a chip fault.
  • power-deny: The reference power is greater than the maximum output power of the interface.
  • classification-overcurrent: It indicates classification overcurrent.
  • power-overcurrent: It indicates interface overcurrent.
  • poweron-fail: It indicates power-on failure.
  • power-ready: The interface is ready for power supply.
  • powering: The server is being powered on.
  • overloaded: The power is overloaded.
  • time-range-poweroff: The interface is in the power-off time range.
  • unstable-voltage: The voltage is unstable.
  • legacy-disable: The interface is not enabled to check compatibility of PDs.
  • high-temperature: The interface temperature is too high.
Port reference power(mW)

Reference power of an interface.

The system automatically identifies the maximum power of a PD, classifies the PD, and defines the reference power for each type of PD. The relationship between the PD type and the reference power is as follows:

0: The reference power is 15400 mW.

1: The reference power is 4000 mW.

2: The reference power is 7000 mW.

3: The reference power is 15400 mW.

4: The reference power is 30000 mW.

5: The reference power is 45000 mW.

6: The reference power is 60000 mW.

7: The reference power is 75000 mW.

8: The reference power is 90,000 mW.
Port power priority

Power supply priority of an interface:

  • Critical: indicates the highest priority.
  • High: indicates the second highest priority.
  • Low: indicates the lowest priority.

To set the priority, run the poe priority command.
Port max power(mW)

Maximum output power of an interface.

To set the value, run the poe power command.
Port current power(mW)

Current output power of an interface.
Port peak power(mW)

Peak output power of an interface.
Port average power(mW)

Average output power of an interface.
Port current(mA)

Output current of an interface.
Port voltage(V)

Output voltage of an interface.
Port single-class

Single-class power supply mode of an interface.

  • disable: standard-class power supply mode.
  • enable: single-class power supply mode.

To configure this parameter, run the poe single-class enable command.
PD class

Class of the PD connected to the interface.

The system automatically classifies PDs into levels 0 to 8 based on the maximum power of the PDs.
PD power auto-neg

Status of the PD power auto-negotiation function.

To configure this parameter, run the poe power auto-neg enable command.
PD support mode

Power supply standard supported by the PD connected to an interface:

  • af: IEEE 802.3af power supply standard.
  • at: IEEE 802.3at power supply standard.
  • af at: IEEE 802.3at and IEEE 802.3af.
PD power-up mode

Current power supply standard of the PD connected to an interface:

  • af: IEEE 802.3af power supply standard.
  • at: IEEE 802.3at power supply standard.
PortName

Interface name.
PowerOn/Off

Whether the interface is powered on:

  • On: The interface is supplying power.
  • Off: No power is supplied.
Enabled

Whether PoE is enabled on an interface.

To enable PoE on an interface, run the poe enable command.
Priority

Power supply priority of an interface:

  • Critical: indicates the highest priority.
  • High: indicates the second highest priority.
  • Low: indicates the lowest priority.

To set the priority, run the poe priority command.
Status

Power supply status of an interface:

  • detecting: It indicates the detecting state.
  • disabled: The PoE function is disabled on the interface.
  • chip-fault: The port is faulty due to a chip fault.
  • power-deny: The reference power is greater than the maximum output power of the interface.
  • classification-overcurrent: It indicates classification overcurrent.
  • power-overcurrent: It indicates interface overcurrent.
  • poweron-fail: It indicates power-on failure.
  • power-ready: The interface is ready for power supply.
  • powering: The server is being powered on.
  • overloaded: The power is overloaded.
  • time-range-poweroff: The interface is in the power-off time range.
  • unstable-voltage: The voltage is unstable.
  • legacy-disable: The interface is not enabled to check compatibility of PDs.
  • high-temperature: The interface temperature is too high.

display poe-power

Function

The display poe-power command displays information about the PoE power supply.

Format

display poe-power

display poe-power { all | chassis chassis-id }

Parameters

Parameter Description Value
all

Displays PoE power supply information about all devices in a CSS.

-
chassis chassis-id

Displays PoE power supply information about a specified device in a CSS.

The value can be 1 or 2.

Views

All views

Default Level

1: Monitoring level

Usage Guidelines

The display poe-power displays information including the available total PoE power, percentage of the reserved power, and power alarm threshold.

Example

The actual command output varies according to the device. The command output here is only an example.

# Display the PoE power supply information of a modular device.
<HUAWEI> display poe-power
Chassis  1                                                                                                                          
  Total PoE Power(mW)             : 50000                                                                                         
  Reserved PoE Power Percent      : 20 %                                                                                          
  PoE Power Threshold Percent     : 90 %                                                                                          
  Available Power(mW)             : 40000                                                                                         
  Consumed Power(mW)              : 19900
Table 2-110 Description of the display poe-power command output
Item Description
Total PoE Power(mW)

PoE power that the system can provide.
PoE Power Threshold Percent

Alarm threshold percentage of PoE power consumption.

To set the threshold percentage, run the poe power-threshold command.
Reserved PoE Power Percent

Reserved PoE power percentage.

To set the percentage, run the poe power-reserved command.
Available Power(mW)

PoE power that the PDs can use.
Consumed Power(mW)

PoE power that the PDs have used.

poe enable

Function

The poe enable command enables the PoE function on an interface.

The undo poe enable command disables the PoE function on an interface.

By default, the PoE function is enabled on an interface.

Format

poe enable

undo poe enable

Parameters

None

Views

10GE interface view,GE interface view,Multi-GE interface view,Interface group view

Default Level

2: Configuration level

Usage Guidelines

Before providing power for the PD connected to an interface, ensure that the PoE function has been enabled on the interface. If the PoE function is not enabled on the interface, run the poe enable command to enable the PoE function on the interface.

In automatic mode, PD power-on and power-off on interfaces are determined by the PoE power and interface power priority. When the PoE power is sufficient, the device does not power off the PD connected to any interface. To stop providing power for a PD, run the undo poe enable command on the interface to which the PD is connected.

Example

# Disable the PoE function on the interface.
<HUAWEI> system-view
[HUAWEI] interface MultiGE 1/0/1
[HUAWEI-MultiGE1/0/1] undo poe enable

poe legacy enable

Function

The poe legacy enable command enables the power sourcing equipment (PSE) to check the compatibility of power devices (PDs), enables forcible powering on a PoE interface, configures an interface to allow generation of the high pulse current during power-on.

The undo poe legacy enable command disables the PSE from checking the compatibility of PDs, disables forcible powering on a PoE interface, and configures an interface not to allow generation of the high pulse current during power-on.

By default, the PSE does not check the capability of PDs, forcible powering is disabled on a PoE interface, interfaces do not allow generation of the high pulse current during power-on.

Format

poe legacy enable

undo poe legacy enable

Parameters

None

Views

10GE interface view,GE interface view,Multi-GE interface view,Interface group view

Default Level

2: Configuration level

Usage Guidelines

After the switch is enabled to check the compatibility of PDs, the switch can detect and provide power to the PDs that do not comply with the 802.3af or 802.3at standard or the standard PDs that are detected as non-standard PDs because of the external environment. If compatibility check is disabled, the switch cannot provide power to the non-standard PDs.

After interfaces are enabled to check the compatibility of PDs, the interfaces can provide power to both standard and non-standard PDs. This configuration does not affect the power supply of standard PDs. That is, the interfaces can still provide power to standard PDs after the poe legacy enable command is configured.

If the power of the system is sufficient, you can run the poe legacy enable command on the interface connected to PDs when the PSE cannot detect the PDs.

High inrush current is generated when a non-standard PD is powered on. In this case, the PSE cuts off the power of the PD to protect itself. If the PSE is required to provide power for the PD, the PSE must allow high inrush current. The high inrush current may damage device components.

Example

# Enable the interface to check the compatibility of PDs, enable forcible powering, and configure the interface to allow generation of the high pulse current during power-on.
<HUAWEI> system-view
[HUAWEI] interface MultiGE 1/0/1
[HUAWEI-MultiGE1/0/1] poe legacy enable
Warning: Is there a valid PD connected to this interface? [Y/N]:y

poe max-power

Function

The poe max-power command sets the maximum output power of the board.

The undo poe max-power command restores the default maximum output power of the board.

By default, the maximum output power provided by a PoE board is dynamically adjusted according to the number of installed PoE power modules and the input voltage.

Format

poe max-power max-power slot slot-id

undo poe max-power [ max-power ] slot slot-id

Parameters

Parameter Description Value
max-power

Specifies the maximum output power.

The value is an integer that ranges from 0 to 2880000, in mW.
slot slot-id

Specifies a slot ID.

Set the value according to the device configuration.

Views

System view

Default Level

2: Configuration level

Usage Guidelines

Usage Scenario

By default, the power of a board in a specified slot is dynamically adjusted according to the remaining device power, so the power allocated to every board varies. To ensure that the board provides PoE power stably when the total device power is insufficient, run the poe max-power command to allocate the fixed power to this board.

Precautions

  • If the configured maximum output power is lower than the total power required by PDs, lower-priority PDs will be powered off or cannot be powered on manually.
  • If the configured maximum output power of a board is higher than that supported by the board, the configuration fails.
  • The configured maximum output power of the device board must be lower than the remaining PoE power of the device. Otherwise, the PDs connected to ports in other boards will be powered off or the configuration does not take effect.

Example

# Set the maximum output power of the specified slot to 216000 mW.
<HUAWEI> system-view
[HUAWEI] poe max-power 216000 slot 1

poe power

Function

The poe power command sets the maximum output power of an interface.

The undo poe power command restores the default maximum output power of an interface.

By default, the maximum output power of an interfaces is 90000mW.

Format

poe power port-max-power

undo poe power

Parameters

Parameter Description Value
port-max-power

Specifies the maximum output power of an interface.

The value is an integer that ranges from 0 to 900000.

Views

10GE interface view,GE interface view,Multi-GE interface view,Interface group view

Default Level

2: Configuration level

Usage Guidelines

Usage Scenario

The PD negotiation power may be different from the power required by some non-standard PDs or PDs that cannot be classified. You can run the poe power command to set the maximum output power of the interface, which prevents power overload for PDs and saves energy.

Generally, the maximum power required by a standard PD is 30000 mW. To be compatible with more PDs, the device provides a maximum interface power.

Example

# Set the maximum output power on the interface to 20000 mW.
<HUAWEI> system-view
[HUAWEI] interface MultiGE 1/0/1
[HUAWEI-MultiGE1/0/1] poe power 20000

poe power auto-neg enable

Function

The poe power auto-neg enable command enables power auto-negotiation for interfaces.

The undo poe power auto-neg enable command disables power auto-negotiation for interfaces.

By default, power auto-negotiation is disabled for interfaces.

Format

poe power auto-neg enable

undo poe power auto-neg enable

Parameters

None

Views

10GE interface view,GE interface view,Multi-GE interface view,Interface group view

Default Level

2: Configuration level

Usage Guidelines

Some APs support 802.3at and 802.3af power supply standards. In this case, the device can provide power for the APs in compliance with 802.3af (the maximum output power is 15.4 W). When an AP connected to the device supports two power supply standards, you can enable power auto-negotiation on the interface connected to the AP. When the total available power of the device is less than 30 W and the device detects that the current power supply standard of the AP is 802.3at, the device can set the power supply standard of the AP to 802.3af through LLDP packets. Power auto-negotiation changes only the power supply standard of APs but not the power supply standard of interfaces.

You can enable power auto-negotiation on an interface to change the power supply standard of APs when the rated output power of the device is fixed. This reduces power consumption of APs and provides power for more APs.

Example

# Enable power auto-negotiation on the interface.
<HUAWEI> system-view
[HUAWEI] interface MultiGE 1/0/1
[HUAWEI-MultiGE1/0/1] poe power auto-neg enable
Warning: This operation will enable PoE power auto-negotiation of the port, which will change the power-up mode of the PD connected to the port from AT to AF in case of insufficient power. Continue?[Y/N]:y

poe power-off time-range

Function

The poe power-off time-range command makes a configured PoE power-off time range effective on an interface.

The undo poe power-off time-range command cancels the configuration.

By default, the PoE power-off time range is not specified for a device.

Format

poe power-off time-range time-name

undo poe power-off time-range

Parameters

Parameter Description Value
time-name

Specifies a name for a PoE power-off time range.

The value is a string of 1 to 32 case-sensitive characters, spaces not supported.

Views

10GE interface view,GE interface view,Multi-GE interface view,Interface group view

Default Level

2: Configuration level

Usage Guidelines

The poe power-off time-range command makes a PoE power-off time range set in the system view effective on an interface. If the current time is within the specified time range, the PD connected to the interface cannot be powered on.

The undo poe power-off time-range command cancels the configuration. The time range does not take effect on the PD connected to the interface; however, the configuration of the time range is still saved.

Example

# Configure a PoE power-off time range from 10:00 to 11:00 for PDs connected to the interface.
<HUAWEI> system-view
[HUAWEI] time-range PoE 10:00 to 11:00 daily
[HUAWEI] interface MultiGE 1/0/1
[HUAWEI-MultiGE1/0/1] poe power-off time-range PoE

poe power-on delay

Function

The poe power-on delay command sets the PoE power supply delay on an interface.

The undo poe power-on delay command restores the default PoE power supply delay on an interface.

By default, the PoE power supply delay is 0. That is, the PoE power supply is not delayed.

Format

poe power-on delay delay-time

undo poe power-on delay

Parameters

Parameter Description Value
delay-time

Specifies the PoE power supply delay.

The value is an integer that ranges from 1 to 60,in seconds.

Views

10GE interface view,GE interface view,Multi-GE interface view,Interface group view

Default Level

2: Configuration level

Usage Guidelines

Usage Scenario

The maintain current of the used PD is insufficient at the power-on moment, so the PoE switch considers that the PD has been disconnected and powers it off. IEEE standards require that a PD must maintain a current value of more than 10 mA for at least 75 ms in each 325 ms duration. Otherwise, the PoE switch considers that the PD has left and powers off the PD.

To enable the PoE switch to power these non-standard PDs, set the PoE power supply delay on the appropriate interfaces of the switch so that the switch detects the maintain power of the PDs after the specified delay.

Precautions

After the PoE power supply delay is configured on an interface, do not replace the PD connected to this interface within the delay. Otherwise, the new PD cannot work properly.

Example

# Set the PoE power supply delay to 5 seconds on the interface.
<HUAWEI> system-view
[HUAWEI] interface MultiGE 1/0/1
[HUAWEI-MultiGE1/0/1] poe power-on delay 5
Warning: Do not replace the PD with another device in 5 seconds since the PD was connected, because this operation will cause the ne
wly connected device towork abnormally. Continue? [Y/N]:y

poe power-reserved

Function

The poe power-reserved command sets the percentage of the reserved PoE power against the total PoE power.

The undo poe power-reserved command restores the default percentage of the reserved PoE power against the total PoE power.

By default, the percentage of the reserved PoE power against the total PoE power is 20%.

Format

poe power-reserved power-reserved

poe power-reserved power-reserved { all | chassis chassis-id }

undo poe power-reserved

undo poe power-reserved { all | [ power-reserved ] chassis chassis-id }

Parameters

Parameter Description Value
power-reserved

Specifies the percentage of the reserved PoE power against the total PoE power.

The value is an integer that ranges from 0 to 100, in percentage.

The default value is 20.
all

Indicates all devices in a CSS.

-
chassis chassis-id

Specifies the CSS ID of a device in a CSS.

The value can be 1 or 2.

Views

System view

Default Level

2: Configuration level

Usage Guidelines

Usage Scenario

The device can dynamically allocate power to each interface according to the power consumption of each interface. The power consumption of a PD keeps changing when the PD is running. The system periodically calculates the total power consumption of all the PDs. If the total power consumption exceeds the upper threshold of the device, the system powers off the PDs on the interfaces of low priority. If interfaces have the same priority, the system powers off the PD on the interface with a larger port number.

Sometimes, however, the power consumption increases sharply and the available power of the system cannot support the burst increase of power. At this time, the system has not calculated and found that the total power consumption exceeded the upper threshold; therefore, the system does not cut off power low-priority interfaces in time. As a result, the PoE power supply is shut down for overload protection, and all PDs are powered off.

This problem can be solved by running the poe power-reserved command to set proper reserved power. When there is a burst increase in power consumption, the reserved power can support the system running. Then the system has time to power off interfaces of low priority to ensure stable running of other PDs.

Precautions

  • The reserved power should not be set greater than 20%. If the reserved PoE power is greater than 20% of the total PoE power, the power capacity of the device is affected.
  • To set the maximum output power of a board, run the poe max-power command. In this case, the board calculates the reserved power based on the set maximum output power. If the maximum output power is not set, the available PoE power is the power provided by the PoE power module.

Example

# Set the percentage of reserved PoE power to the total PoE power to 30%.
<HUAWEI> system-view
[HUAWEI] poe power-reserved 30
Warning: The power for new PDs may be insufficient after this operation is performed. Continue?[Y/N]: [Y/N]: y

poe power-threshold

Function

The poe power-threshold command sets the alarm threshold of the PoE power consumption percentage.

The undo poe power-threshold command restores the default alarm threshold of the PoE power consumption percentage.

By default, the alarm threshold is 90%. That is, an alarm is generated when the consumed power accounts for 90% of the total power.

Format

poe power-threshold threshold-value

poe power-threshold threshold-value { all | chassis chassis-id }

undo poe power-threshold { all | [ threshold-value ] chassis chassis-id }

undo poe power-threshold

Parameters

Parameter Description Value
threshold-value

Specifies the alarm threshold of the PoE power consumption percentage. When the power consumption reaches this value, a PoE power alarm is generated.

The value is an integer that ranges from 0 to 100, in percentage.

The default value is 90.
all

Indicates all devices in a CSS.

-
chassis chassis-id

Specifies the CSS ID of a device in a CSS.

The value can be 1 or 2.

Views

System view

Default Level

2: Configuration level

Usage Guidelines

The poe power-threshold command sets the alarm threshold of the PoE power consumption percentage. If the total PoE power is 369.6 W and the alarm threshold is 90%, an alarm is generated when the power consumption is greater than 332.64 W. When the power consumption falls below 332.64 W, the alarm is cleared.

Example

# Set the alarm threshold of the PoE power consumption percentage to 80%.
<HUAWEI> system-view
[HUAWEI] poe power-threshold 80

poe priority

Function

The poe priority command sets the power priority of a PoE interface.

The undo poe priority command restores the default power priority of a PoE interface.

By default, the power supply priority of an interface is low.

Format

poe priority { critical | high | low }

undo poe priority

Parameters

Parameter Description Value
critical

Indicates the highest priority.

-
high

Indicates the second highest priority.

-
low

Indicates the lowest priority.

-

Views

10GE interface view,GE interface view,Multi-GE interface view,Interface group view

Default Level

2: Configuration level

Usage Guidelines

Usage Scenario

When the output power of a device is insufficient, the device in automatic power management mode provides power for the interfaces of the higher power supply priorities first and cuts off power of the interfaces of the lower power supply priorities. If all the interfaces are of the same priority, the power supply priority of the interface with a smaller interface number is higher.

Precautions

  • When the PoE priority of an interface is increased and the available PoE power is insufficient, the PDs connected to some low-priority interfaces may be powered off.
  • When the PoE priority of an interface is reduced and the available PoE power is insufficient, the PD connected to the interface may be powered off.

Example

# Set the power supply priority of the interface to critical.
<HUAWEI> system-view
[HUAWEI] interface MultiGE 1/0/1
[HUAWEI-MultiGE1/0/1] poe priority critical
Warning: This operation may power off some PD with lower priority. Continue?[Y/N]:y
# Set the power supply priority of the interface to low.
<HUAWEI> system-view
[HUAWEI] interface MultiGE 1/0/1
[HUAWEI-MultiGE1/0/1] poe priority low
Warning: This operation may power off the PD connected to this port. Continue? [Y/N]:y

poe single-class enable

Function

The poe single-class enable command configures the single-class power supply mode for an interface.

The undo poe legacy enable command restores the standard hierarchical power supply mode for an interface.

By default,the interface works in standard hierarchical power supply mode.

Format

poe single-class enable

undo poe single-class enable

Parameters

None

Views

10GE interface view,GE interface view,Multi-GE interface view,Interface group view

Default Level

2: Configuration level

Usage Guidelines

If PoE interfaces provide power to non-standard PDs in standard hierarchical power supply mode, these PDs cannot initiate power requests using LLDP and can only obtain a low power. As a result, these PDs cannot work normally. To address this issue, run the poe legacy enable command to configure the single-class power supply mode for PoE interfaces. These non-standard PDs can then initiate power requests and obtain the standard power supply to work normally.

Example

# Enable the single-class power supply mode.
<HUAWEI> system-view
[HUAWEI] interface MultiGE 1/0/1
[HUAWEI-MultiGE1/0/1] poe single-class enable
Warning: This command conflicts with the poe af-inrush enable command, and will undo the poe af-inrush enable command on the current port. Continue? [Y/N]:y

poe { af-inrush | at-inrush | bt-inrush } enable

Function

The poe enable command changes the power supply mode of interfaces supporting the PoE++ mode.

The undo poe enable command restores the default power supply mode of PoE interfaces.

By default, interfaces supporting the PoE++ mode on devices provide power in PoE++ mode. That is, the power supply mode is bt-inrush, interfaces not supporting the PoE++ mode on devices provide power in at-inrush mode.

Format

poe { af-inrush | at-inrush } enable

poe bt-inrush enable

undo poe { af-inrush | at-inrush } enable

undo poe bt-inrush enable

Parameters

Parameter Description Value
af-inrush

Sets the power supply mode to PoE.

-
at-inrush

Sets the power supply mode to PoE+.

-
bt-inrush

Sets the power supply mode to PoE++.

-

Views

10GE interface view,GE interface view,Multi-GE interface view,Interface group view

Default Level

2: Configuration level

Usage Guidelines

Usage Scenario

To power the PDs requiring the standard power supply mode, run the poe at-inrush enable command. This command changes the power supply mode of the PoE interface to the PoE+ mode.

Precautions

  • If the poe af-inrush enable command has been configured on an interface, the poe af-inrush enable command configuration is automatically overwritten by the poe af-inrush enable command configuration.
  • Changing the power supply mode of a PoE interface will power off the PD connected to the interface.

Example

# Set the power supply mode of the interface to PoE+.
<HUAWEI> system-view
[HUAWEI] interface MultiGE 1/0/1
[HUAWEI-MultiGE1/0/1] poe at-inrush enable
Warning: This operation will cause the PD to be powered off. Continue?[Y/N]:y
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Update Date：2024-04-22
Document ID：EDOC1100278255
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