The maximum wattage is 30,000 mW.
The default port priority is low.
Command Default
Interface configuration
Command History
ModificationRelease
This command was introduced.Cisco IOS XE 3.3SE
Usage Guidelines
This command is supported only on PoE-capable ports. If you enter this command on a port that does not
support PoE, this error message appears:
Device(config)# interface gigabitethernet1/0/1
Device(config-if)# power inline auto
^
% Invalid input detected at '^' marker.
In a switch stack, this command is supported on all ports in the stack that support PoE.
Cisco Universal Power Over Ethernet (Cisco UPOE) is a Cisco proprietary technology that extends the IEEE
802.at PoE standard to provide the capability to source up to 60 W of power over standard Ethernet cabling
infrastructure (Class D or better) by using the spare pair of an RJ-45 cable (wires 4,5,7,8) with the signal pair
(wires 1,2,3,6). Power on the spare pair is enabled when the switch port and end device mutually identify
themselves as Cisco UPOE-capable using CDP or LLDP and the end device requests for power to be enabled
on the spare pair. When the spare pair is powered, the end device can negotiate up to 60 W of power from the
switch using CDP or LLDP. Use the power inline four-pair forced command when the end device is
PoE-capable on both signal and spare pairs, but does not support the CDP or LLDP extensions required for
Cisco UPOE.
Use the max max-wattage option to disallow higher-power powered devices. With this configuration, when
the powered device sends Cisco Discovery Protocol (CDP) messages requesting more power than the maximum
wattage, the switch removes power from the port. If the powered-device IEEE class maximum is greater than
the maximum wattage, the switch does not power the device. The power is reclaimed into the global power
budget.
The switch never powers any class 0 or class 3 device if the power inline max max-wattage command
is configured for less than 30 W.
Note
If the switch denies power to a powered device (the powered device requests more power through CDP
messages or if the IEEE class maximum is greater than the maximum wattage), the PoE port is in a power-deny
state. The switch generates a system message, and the Oper column in the show power inline privileged
EXEC command output shows power-deny.
Use the power inline static max max-wattage command to give a port high priority. The switch allocates
PoE to a port configured in static mode before allocating power to a port configured in auto mode. The switch
reserves power for the static port when it is configured rather than upon device discovery. The switch reserves
the power on a static port even when there is no connected device and whether or not the port is in a shutdown
or in a no shutdown state. The switch allocates the configured maximum wattage to the port, and the amount
Command Reference, Cisco IOS XE Everest 16.5.1a (Catalyst 3650 Switches)
61
power inline
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