H3C SOHO IE4300, Справочник по командам

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IMPORTANT:
Only the UPWR switch models support this command. For the specific switch models, see the
installation guide for the switch series.
Default
By default, the PoE standard of a PI is IEEE 802.3bt.
Views
PI view
Predefined user roles
network-admin
Parameters
at
: Specify the IEEE 802.3at standard.
bt : Specify the IEEE 802.3bt standard.
Usage guidelines
For this command to take effect, restore the maximum power of the PI to the default before
executing the command.
IEEE released 802.3af (PoE), 802.3at (PoE+), and 802.3bt (PoE++) standards in chronological
sequence. These standards are backward compatible but forwards incompatible. Before supplying
power to a PD, a PI will detect the PD, determine the power class for the PD based on its power
requirement, and supplies power to the PD based on the power class.
•
802.3af —Defines four power classes 0 to 3 and provides a maximum power of 12.95 W.
•
802.3at —Adds class 4 in addition to the four power classes defined by 802.3af and provides a
maximum power of 25.5 W.
•
802.3bt —Adds classes 5 to 8 in addition to the five power classes defined by 802.3at and
provides a maximum power of 71 W.
Specify a PoE standard based on the power requirement of the PD. If the maximum power allowed
by the standard is less than that required by the PD, the PI will not supply power to the PD.
CAUTION:
When a PI is operating in 802.3bt mode and providing a power output over 30 W, changing the PoE
standard might cause a power cycle of the PD. Before changing the PoE standard, make sure you
understand its impact on the live network.
Examples
# Specify the IEEE 802.3at standard for GigabitEthernet1/0/1.
<Sysname> system-view
[Sysname] interface gigabitethernet 1/0/1
[Sysname-GigabitEthernet1/0/1] poe standard at
Related commands
poe max-power
(interface view)
poe update
Use poe update to upgrade the PSE firmware when the device is operating.