When configuring PoE, go to these sections
for information you are interested in:
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PoE
Overview
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PoE
Configuration
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PoE
Configuration Example
Power over Ethernet (PoE)-enabled devices
use twisted pairs through electrical ports to supply power to the remote powered
devices (PD) in the network and implement power supply and data transmission simultaneously.
I. Advantages of PoE
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Reliability: The centralized power supply
provides backup convenience, unified management, and safety.
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Easy connection: Network terminals only require
an Ethernet cable, but no external power supply.
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Standard: PoE conforms to the 802.3af standard
and uses a globally uniform power interfaces;
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Bright application prospect: PoE can be applied
to IP phones, wireless access points (APs), chargers for portable devices, card
readers, network cameras, and data collection system.
II. PoE components
PoE consists of three components: power
sourcing equipment (PSE), PD, and power interface (PI).
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PSE: PSE is comprised of the power and the PSE
functional module. It can implement PD detection, PD power information
collection, PoE, power supply monitoring, and power-off for devices.
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PD: PDs receive power from the PSE. PDs include
standard PDs and nonstandard PDs. Standard PDs conform to the 802.3af standard,
including IP phones, Wireless APs, network cameras and so on.
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PI: PIs are RJ45 interfaces which connect
PSE/PDs to network cables.
PoE-enabled S5600 series Ethernet switches
include:
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S5600-26C-PWR
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S5600-50C-PWR
A PoE-enabled S5600 switch has the
following features:
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As the PSE, it supports the IEEE802.3af standard.
It can also supply power to the PDs that do not support the 802.3af standard.
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It can deliver data and current simultaneously through
data wires (1,2,3,and 6) of category-3/5 twisted pairs.
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Through the fixed 24/48 Ethernet electrical
ports, it can supply power to up to 24/48 remote Ethernet switches with a maximum
distance of 100 m (328 feet).
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Each Ethernet electrical port can supply at most
a power of 15,400 mW to a PD.
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When AC power input is adopted for the switch, the
maximum total power that can be provided is 300 W. The switch can determine
whether to supply power to the next remote PD it detects depending on its
available power.
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When DC power input is adopted for the switch, it
is capable of supplying full power to all of the 24/48 ports, that is, 15,400 mW
for each port, and the total power is 369.6 W/739.2 W.
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The PSE processing software on the switch can be
upgraded online.
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The switch provides statistics about power
supplying on each port and the whole equipment, which you can query through the
display command.
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The switch provides two modes (auto and manual)
to manage the power feeding to ports in the case of PSE power overload.
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The switch provides over-temperature protection
mechanism. Using this mechanism, the switch disables the PoE feature on all ports
when its internal temperature exceeds 65°C (149°F) for self-protection, and
restores the PoE feature on all its ports when the temperature drops below 60°C
(140°F).
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The switch supports the PoE profile feature,
that is, different PoE policies can be set for
different user groups. These PoE policies are each saved in the corresponding
PoE profile and applied to ports of the user groups.
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When you use the PoE-enabled S5600 switch to
supply power, the PDs need no external power supply.
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If a remote PD has an external power supply, the
PoE-enabled S5600 switch and the external power supply will backup each other
for the PD.
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Only the Ethernet electrical ports of the PoE-enabled
S5600 switch support the PoE feature.
Complete the following tasks to configure PoE configuration:
Follow these steps to enable the PoE feature on a port:
|
To do…
|
Use the command…
|
Remarks
|
|
Enter system view
|
system-view
|
—
|
|
Enter Ethernet port view
|
interface interface-type interface-number
|
—
|
|
Enable the PoE feature on a port
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poe enable
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Required
|
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By default, the PoE function on a port is
enabled by the default configuration file (config.def) when the device is
delivered.
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If you delete the default configuration file
without specifying another one, the PoE function on a port will be disabled
after you restart the device.
The maximum power that can be supplied by each
Ethernet electrical port of a PoE-enabled S5600 switch to its PD is 15,400 mW.
In practice, you can set the maximum power on a port depending on the actual
power of the PD, in the range of 1,000 to 15,400 mW and in the granularity of
100 mW.
Follow these steps to set the maximum output power on a port:
|
To do…
|
Use the command…
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Remarks
|
|
Enter system view
|
system-view
|
—
|
|
Enter Ethernet port view
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interface interface-type interface-number
|
—
|
|
Set the maximum output power on the port
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poe max-power max-power
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Required
15,400 mW by default.
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When a switch is close to its full load in
supplying power, you can adjust the power supply of the switch through the
cooperation of the PoE management mode and the port PoE priority settings. S5600
series switches support two PoE management modes, auto and manual. The auto
mode is adopted by default.
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auto: When the
switch is close to its full load in supplying power, it will first supply power
to the PDs that are connected to the ports with critical priority, and then
supply power to the PDs that are connected to the ports with high priority. For
example: Port A has the priority of critical. When the switch PoE is close to
its full load and a new PD is now added to port A, the switch will power down
the PD connected to the port with the lowest priority and turn to supply power
to this new PD. If more than one port has the same lowest priority, the switch
will power down the PD connected to the port with larger port number.
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manual: When the
switch is close to its full load in supplying power, it will not make change to
its original power supply status based on its priority when a new PD is added. For
example: Port A has the priority critical. When the switch PoE is close to its
full load and a new PD is now added to port A, the switch just gives a prompt
that a new PD is added and will not supply power to this new PD.
After the PoE feature is enabled on the
port, perform the following configuration to set the PoE management mode and PoE
priority of a port.
Follow these steps to set the PoE management mode and PoE priority of a port:
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To do…
|
Use the command…
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Remarks
|
|
Enter system view
|
system-view
|
—
|
|
Set the PoE management mode for the
switch
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poe power-management { auto | manual }
|
Required
auto by
default.
|
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Enter Ethernet port view
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interface interface-type interface-number
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—
|
|
Se the PoE priority of a port
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poe priority { critical | high | low }
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Required
low by
default.
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PoE mode of a port falls into two types,
signal mode and spare mode.
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Signal mode: DC power is carried over the data pairs
(1,2,3,and 6) of category-3/5 twisted pairs.
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Spare mode: DC power is carried over the spare pairs
(4,5,7,and 8) of category-3/5 twisted pairs.
Currently, S5600 series Ethernet switches
do not support the spare mode.
After the PoE feature is enabled on the
port, perform the following configuration to set the PoE mode on a port.
Follow these steps to set the PoE mode on a port:
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To do…
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Use the command…
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Remarks
|
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Enter system view
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system-view
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—
|
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Enter Ethernet port view
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interface interface-type interface-number
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—
|
|
Set the PoE mode on the port to signal
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poe mode signal
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Optional
signal by
default.
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After the PD compatibility detection function
is enabled, the switch can detect the PDs that do not conform to the 802.3af
standard and supply power to them.
After the
PoE feature is enabled, perform the following configuration to enable the PD
compatibility detection function.
Follow these steps to configure the PD
compatibility detection function:
|
To do…
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Use the command…
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Remarks
|
|
Enter
system view
|
system-view
|
—
|
|
Enable the
PD compatibility detection function
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poe
legacy enable
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Required
Disabled
by default.
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1.2.7 Configuring
PoE Over-Temperature Protection on the Switch
If this function is enabled, the switch
disables the PoE feature on all ports when its internal temperature exceeds 65°C
(149°F) for self-protection, and restores the PoE feature settings on all its
ports when the temperature drops below 60°C (140°F).
Follow these steps
to configure PoE over-temperature protection on the switch:
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To do…
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Use the command…
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Remarks
|
|
Enter system view
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system-view
|
—
|
|
Enable PoE over-temperature protection on
the switch
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poe temperature-protection enable
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Optional
Enabled by default.
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When the internal temperature of the switch
decreases from X (X>65°C, or X>149°F) to Y (60°C≤Y<65°C,
or 140°F≤Y<149°F), the switch still keeps the PoE function disabled on
all the ports.
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When the internal temperature of the switch
increases from X (X<60°C, or X<140°F) to Y (60°C<Y≤65°C,
or 140°F<Y≤149°F), the switch still keeps the PoE function enabled on
all the ports.
1.2.8 Upgrading the PSE Processing Software
Online
The online upgrading of PSE processing
software can update the processing software or repair the software if it is
damaged. Before performing the following configuration, download the PSE
processing software to the Flash of the switch.
Follow these steps to upgrade PSE processing software online:
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To do…
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Use the command…
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Remarks
|
|
Enter
system view
|
system-view
|
—
|
|
Upgrade the
PSE processing software online
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poe
update { refresh | full } filename
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Required
The
specified PSE processing software is a file with the extension .s19.
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In the case that the PSE processing software is
damaged (that is, no PoE command can be executed successfully), use the full
update mode to upgrade and thus restore the software.
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The refresh update mode is to upgrade the
original processing software in the PSE through refreshing the software, while
the full update mode is to delete the original processing software in
PSE completely and then reload the software.
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Generally, the refresh update mode is
used to upgrade the PSE processing software.
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When the online upgrading procedure is
interrupted for some unexpected reason (for example, the device restarts due to
some errors), if the upgrade in full mode fails after restart, you must
upgrade in full mode after power-off and restart of the device, and then
restart the device manually. In this way, the former PoE configuration is
restored.
You can update or repair the damaged PSE
processing software through upgrading it.
By executing the following command on any
device in the fabric, you can upgrade the PSE processing software of all
devices in the fabric by using the specified PSE processing software. For
details of fabric, see the IRF Fabric part of this manual.
Follow these steps to upgrade the PSE
processing software online:
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To do…
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Use the command…
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Remarks
|
|
Upgrade the PSE processing software of
the fabric switch online
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update fabric { file-url | device-name file-url
}
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Optional
|
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To do…
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Use the command…
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Remarks
|
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Display
the PoE status of a specific port or all ports of the switch
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display
poe interface [ interface-type interface-number
]
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Available
in any view
|
|
Display
the PoE power information of a specific port or all ports of the switch
|
display
poe interface power [ interface-type
interface-number ]
|
|
Display
the PSE parameters
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display
poe powersupply
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Display
the status (enabled/disabled) of the PoE over-temperature protection feature on
the switch
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display
poe temperature-protection
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1.3 PoE Configuration Example
I. Network requirements
Switch A is an S5600 series Ethernet switch
supporting PoE, Switch B can be PoE powered.
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The GigabitEthernet 1/0/1 and GigabitEthernet 1/0/2
ports of Switch A are connected to Switch B and an AP respectively; the GigabitEthernet
1/0/8 port is intended to be connected with an important AP.
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The PSE processing software of Switch A is first
upgraded online. The remotely accessed PDs are powered by Switch A.
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The power consumption of the accessed AP is 2,500
mW, and the maximum power consumption of Switch B is 12,000 mW.
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It is required to guarantee the power feeding to
the PDs connected to the GigabitEthernet 1/0/8 port even when Switch A is under
full load.
II. Network diagram
Figure 1-1 Network diagram for PoE
III. Configuration procedure
# Upgrade
the PSE processing software online.
<SwitchA>
system-view
[SwitchA]
poe update refresh 0290_021.s19
# Enable the
PoE feature on GigabitEthernet 1/0/1, and set the PoE maximum output power of GigabitEthernet
1/0/1 to 12,000 mW.
[SwitchA] interface GigabitEthernet
1/0/1
[SwitchA-GigabitEthernet1/0/1] poe
enable
[SwitchA-GigabitEthernet1/0/1] poe
max-power 12000
[SwitchA-GigabitEthernet1/0/1] quit
# Enable the PoE feature on GigabitEthernet
1/0/2, and set the PoE maximum output power of GigabitEthernet 1/0/2 to 2500
mW.
[SwitchA] interface GigabitEthernet
1/0/2
[SwitchA-GigabitEthernet1/0/2] poe
enable
[SwitchA-GigabitEthernet1/0/2] poe
max-power 2500
[SwitchA-GigabitEthernet1/0/2] quit
# Enable the PoE feature on GigabitEthernet
1/0/8, and set the PoE priority of GigabitEthernet 1/0/8 to critical.
[SwitchA] interface GigabitEthernet
1/0/8
[SwitchA-GigabitEthernet1/0/8] poe
enable
[SwitchA-GigabitEthernet1/0/8] poe
priority critical
[SwitchA-GigabitEthernet1/0/8] quit
# Set the PoE management mode on the switch
to auto (it is the default mode, so this step can be omitted).
[SwitchA] poe power-management auto
# Enable the
PD compatibility detect of the switch to allow the switch to supply power to
the devices noncompliant with the 802.3af standard.
[SwitchA]
poe legacy enable
When configuring PoE profile, go to these
sections for information you are interested in:
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Introduction to PoE Profile
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PoE Profile Configuration
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Displaying PoE Profile Configuration
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PoE Profile Configuration
Example
On a large-sized
network or a network with mobile users, to help network administrators to
monitor the PoE features of the switch, S5600 series Ethernet switches provide the
PoE profile features. A PoE profile is a set of PoE configurations, including
multiple PoE features.
Features of PoE profile:
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Various PoE profiles can be created. PoE policy
configurations applicable to different user groups are stored in the corresponding
PoE profiles. These PoE profiles can be applied to the ports used by the
corresponding user groups.
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When users connect a PD to a PoE-profile-enabled
port, the PoE configurations in the PoE profile will be enabled on the port.
Follow these steps
to configure PoE profile:
|
To do…
|
Use the command…
|
Remarks
|
|
Enter system view
|
system-view
|
—
|
|
Create a PoE profile and enter PoE
profile view
|
poe-profile profilename
|
Required
If the PoE file is created, you will enter
PoE profile view directly through the command.
|
|
Configure
the relevant features in PoE profile
|
Enable the
PoE feature on a port
|
poe
enable
|
Required
Disabled
by default.
|
|
Configure
PoE mode for Ethernet ports
|
poe
mode { signal | spare }
|
Optional
signal by default.
|
|
Configure
the PoE priority for Ethernet ports
|
poe
priority { critical | high | low
}
|
Optional
low by default.
|
|
Configure the maximum power for Ethernet
ports
|
poe max-power max-power
|
Optional
15,400 mW by default.
|
|
Quit system view
|
quit
|
—
|
|
Apply the existing PoE profile to the
specified Ethernet port
|
In system view
|
apply poe-profile profile-name interface interface-type interface-number
[ to interface-type interface-number ]
|
Use either approach.
|
|
In Ethernet port view
|
Enter Ethernet port view
|
interface interface-type
interface-number
|
|
Apply the existing PoE profile to the
port
|
apply poe-profile profile-name
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Note the following during the configuration:
1)
When the apply poe-profile command is
used to apply a PoE profile to a port, some PoE features in the PoE profile can
be applied successfully while some cannot. PoE profiles are applied to S5600
series Ethernet switches according to the following rules:
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When the apply poe-profile command is
used to apply a PoE profile to a port, the PoE profile is applied successfully
only if one PoE feature in the PoE profile is applied properly. When the display
current-configuration command is used for query, it is displayed that the
PoE profile is applied properly to the port.
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If one or more features in the PoE profile are
not applied properly on a port, the switch will prompt explicitly which PoE
features in the PoE profile are not applied properly on which ports.
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The display current-configuration command
can be used to query which PoE profile is applied to a port. However, the
command cannot be used to query which PoE features in a PoE profiles are
applied successfully.
2)
PoE profile configuration is a global
configuration, and applies synchronously in the Intelligent Resilient Framework
(IRF) system.
3)
Combination of Unit creates a new Fabric. In the
newly created Fabric, the PoE profile configuration of the Unit with the
smallest Unit ID number will become the PoE profile configuration for the
Fabric currently in use.
4)
Split of Fabric results in many new Fabrics. In
each newly created Fabric, the PoE profile configuration of each Unit remains
the same as it was before the split.
2.3 Displaying
PoE Profile Configuration
|
To do…
|
Use the command…
|
Remarks
|
|
Display the detailed information about
the PoE profiles created on the switch
|
display poe-profile { all-profile | interface interface-type
interface-number | name profile-name }
|
Available in any view
|
I. Network requirements
Switch A is an S5600 series Ethernet switch
supporting PoE.
GigabitEthernet 1/0/1 through GigabitEthernet
1/0/10 of Switch A are used by users of group A, who have the following
requirements:
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The PoE function can be enabled on all ports in
use.
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Signal mode is used to supply power.
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The PoE priority for GigabitEthernet 1/0/1
through GigabitEthernet 1/0/5 is Critical, whereas the PoE priority for GigabitEthernet
1/0/6 through GigabitEthernet 1/0/10 is High.
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The maximum power for GigabitEthernet 1/0/1
through GigabitEthernet 1/0/5 ports is 3000 mW, whereas the
Caution: