ECS4110-28P_Management Guide

C HAPTER 14 | Basic Administration Protocols
Power over Ethernet
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◆ If a device is connected to a switch port and the switch detects that it
requires more than the power budget set for the port or to the overall
switch, no power is supplied to the device (i.e., port power remains
off).
◆ If the power demand from devices connected to all switch ports
exceeds the power budget set for the switch, the port power priority
settings are used to control the supplied power. For example:
■
If a device is connected to a low-priority port and causes the switch
to exceed its budget, power to this port is not turned on.
■
If a device is connected to a critical or high-priority port and would
cause the switch to exceed its power budget as determined during
bootup, power is provided to the port only if the switch can drop
power to one or more lower-priority ports and thereby remain
within its overall budget.
■
If a device is connected to a port after the switch has finished
booting up and would cause the switch to exceed its budget, power
will not be provided to that port regardless of its priority setting.
■
If priority is not set for any ports, and PoE consumption exceeds the
maximum power provided by the switch, power is shut down in the
following sequence:
PARAMETERS
These parameters are displayed:
◆ Port – The port number on the switch.
◆ Admin Status – Enables PoE power on a port. Power is automatically
supplied when a device is detected on a port, providing that the power
demanded does not exceed the switch or port power budget.
(Default: Enabled)
◆ Mode – Shows whether or not PoE power is being supplied to a port.
◆ Time Range Name – Name of a time range. If a time range is set,
then PoE will be provided to an interface during the specified period.
(Range: 1-16 characters)
◆ Time Range Status – Indicates if a time range has been applied to an
interface, and whether it is currently active or inactive.
Table 32: PoE Shut Down Sequence
Switch PoE Port Shut Down Sequence
ECS4110-28P 12, 11, 10, 9, 8, 7, 6, 5, 4, 3, 2, 1, 24, 23, 22, 21, 20, 19,
18, 17, 16, 15, 14, 13
ECS4110-52P 12, 11, 10, 9, 8, 7, 6, 5, 4, 3, 2, 1, 24, 23, 22, 21, 20,
19, 18, 17, 16, 15, 14, 13, 36, 35, 34, 33, 32, 31, 30, 29,
28, 27, 26, 25, 48, 47, 46, 45, 44, 43, 42, 41, 40, 39, 38, 37