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Configuration Guide - Device Management

S2720, S5700, and S6720 V200R013C00

This document describes the configurations of Device Management, including device status query, hardware management, Stack, SVF, cloud-based management, PoE, monitoring interface, OPS, energy-saving management, information center, fault management, NTP, synchronous ethernet, PTP.
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Configuring PoE Power Management

Configuring PoE Power Management

Context

The maximum output power of the device is determined by the PoE-capable module quantity, type, and input voltage. You can configure the maximum power, percentage of PoE power to be reserved, PoE power alarm threshold, and maximum power on each interface. Setting power parameters based on the requirements of PDs connected to the device helps effectively use PoE power and ensures device stability.

Procedure

  • Configure the PoE power supply mode.

    The S5720I-28X-PWH-SI-AC has two built-in power modules for 1+1 power redundancy. To improve system stability, set the PoE power supply mode of the S5720I-28X-PWH-SI-AC to the backup mode.

    1. Run system-view

      The system view is displayed.

    2. Run poe-power backup-mode backup-mode [ slot slot-id ]

      The PoE power supply mode of the S5720I-28X-PWH-SI-AC is configured.

      By default, the PoE power supply mode is the high-power mode.

      NOTE:

      Changing the PoE power supply mode will power off the PDs connected to all ports.

  • Configure the maximum output power of the device.

    If the power that the network provides for the PoE device is unstable, for example, the mains voltage fluctuates, the power that the PoE device provides for PDs is affected and begins to fluctuate. As a result, PDs are not provided with sufficient power and some PDs are powered off. You can configure the maximum output power of the device to ensure power stability for a PD.

    1. Run system-view

      The system view is displayed.

    2. Run poe max-power max-power [ slot slot-id ]

      The maximum output power of the device is configured.

      By default, the maximum output power of the device is the total power of PoE power modules. Therefore, the configured maximum output power must be lower than or equal to the total power of PoE power modules. On the S5720I-12X-PWH-SI-DC, the default maximum output power is 220000 mW, and the supported maximum output power is 240000 mW. On the S5720I-10X-PWH-SI-AC, the default maximum output power is 175000 mW. When the 110 V voltage is input, the maximum output power is 175000 mW. When the input voltage is 220 V, the maximum output power is 200000 mW.

  • Configure the maximum output power for an interface.

    The PD power negotiation result may be different from the power required by non-standard PDs or PDs that cannot be classified. You can configure the maximum output power of an interface to prevent power overload for PDs and save energy.

    An interface provides 15400 mW power to PDs based on the power class 0 if non-standard PDs are connected to the interface or forcible power supply is configured on the interface of the switches except the S5720I-6X-PWH-SI-AC, S5720I-10X-PWH-SI-AC, S5720-16X-PWH-LI-AC, S5720-28X-PWH-LI-AC, S5720I-SI, S5730HI, S5730SI, S5730S-EI, and S6720SI.

    1. Run system-view

      The system view is displayed.

    2. Run interface interface-type interface-number

      The interface view is displayed.

    3. Run poe power port-max-power

      The maximum output power is configured for the interface.

      This default value varies depending on interfaces of switches:
      • The MultiGE interface of an S5720-14X-PWH-SI-AC: 90000 mW; Other electrical interface of an S5720-14X-PWH-SI-AC: 30000 mW
      • The MultiGE interface of an S5720-28X-PWH-LI-AC: 60000 mW; Other electrical interface of an S5720-14X-PWH-SI-AC: 30000 mW
      • First 8 electrical interfaces of an S5720I-28X-PWH-SI-AC: 60000 mW; last 16 electrical interfaces of an S5720I-28X-PWH-SI-AC: 30000 mW
      • The electrical interface of an S5720I-6X-PWH-SI-AC, S5720I-10X-PWH-SI-AC, S5720I-12X-PWH-SI-DC, S5720-16X-PWH-LI-AC, S5730HI or S6720SI: 60000 mW
      • The electrical interface of other PoE devices: 30000 mW

  • Configure the percentage of PoE power to be reserved.

    The power of a PD continually changes while the PD is running. Sometimes, the power consumption increases sharply and the available power of the device cannot support the burst increase of power. If the device does not detect this problem and cuts off PDs on low-priority interfaces, all PDs will be powered off due to overload. You can configure reserved power to solve the problem. When power consumption increases sharply, the reserved power can support the running of the system. The device can immediately power off PDs on low-priority interfaces to ensure that other PDs continue to run stably.

    1. Run system-view

      The system view is displayed.

    2. Run poe power-reserved power-reserved [ slot slot-id ]

      The percentage of the PoE power to be reserved is configured.

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

  • Configure the alarm threshold for the percentage of power consumption.

    When power consumption increases sharply, the reserved power can often satisfy power requirements. However, if power consumption exceeds the safe range, some PDs will still be powered off. To solve this problem, configure an alarm threshold for the percentage of power consumption. When power consumption exceeds this threshold, the system generates an alarm, alerting administrators to take measures to reduce power consumption.

    1. Run system-view

      The system view is displayed.

    2. Run poe power-threshold threshold-value [ slot slot-id ]

      The alarm threshold for the percentage of power consumption is configured.

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

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Updated: 2019-04-20

Document ID: EDOC1100065674

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