Extreme Networks ExtremeWare 7.7, Command Reference Manual

Page: 2359 / 2620

configure inline-power operator-limit ports
ExtremeWare 7.7 Command Reference Guide 2359
configure inline-power operator-limit ports
configure inline-power operator-limit <milliwatts> ports <portlist>
Description
Sets the maximum power on the specified ports to either the default value or the specified watts.
Syntax Description
Default
15400 mW
Usage Guidelines
The Summit 300-24 or 400-24p switch has an operator limit range of 300 to 15400 milliwatts. The
Summit 300-48 and Alpine switches have an operator limit range of 300 to 20000 milliwatts.
The standard 802.3af protocol permits a powered device to be classified into one of 5 classes, each of
which determines the maximal power draw to the power sourcing equipment (PSE). Extreme PSEs, in
the default configuration, use the classification-to-power draw in performing power management and
budgeting.
Classification is optional, and many powered devices do not support it. Therefore, under normal
conditions, the Extreme PSE budgets for the maximum permitted power (15.4 watts), even though the
maximum device draw may be less. This may cause fewer devices to be powered, since the power
budget is prematurely exhausted. There is a wide variation in power consumption levels between
802.3af classes (~8 watts). In such cases, the power level limit (operator-limit) can be set on a per port
basis. If this is done, the operator limit, rather than the discovered class limit will be used for power
budgeting. It is also necessary for the violation-precedence to be set to
operator-limit
.
Regardless of how the port power limit is derived (through automatic classification or operator limit),
the port power limit is used to determine whether the overall system limit has been exceeded. On the
Summit 300-48 switch, after the overall system limit is reached, additional PoE ports are powered based
on the system violation-precedence setting and port power priority. The Summit 300-24 and 400-24p
switches have sufficient power to support 15.4 watts on all 24 ports.
The power port limit is also used during system operation to limit the power supplied to each PoE port.
If a powered device attempts to draw more power than has been budgeted, the chassis will remove
power from that port to prevent system overload or device damage.
This command sets the limit on the specified ports to either the default value or the specified watts. The
range is 3000-20000 mW. The default value is 15400 mW minimum. This command is used in
milliwatts An integer specifying milliwatts in the range of 3000 – 20000 mW.
On the Summit 300-24 or 400-24p, an integer specifying milliwatts in the range of 3000 – 15400
mW.
portlist Specifies one or more slots and ports. On a modular switch, can be a list of slots and ports. On a
stand-alone switch, can be one or more port numbers. May be in the form 1, 2, 3-5, 1:*, 1:5, 1:6-1:8,
2:*, 2:5, 2:6-2:8.