Brocade FastIron Ethernet Switch Administration Guide - Manual (Page 277)

NOTE
Do not configure a class value of 4 on a PoE+ port on which a standard PoE PD is connected. Standard
PoE PDs support a maximum of 15.4 watts. Setting the power class value to 4 (30 watts) could damage
the PD.
For information about resetting the power class, refer to Resetting PoE parameters on page 278.
Setting the power budget for a PoE interface module
By default, each PoE and PoE+ interface module has a maximum power budget of 65535 watts. If
desired, you can change the amount of power allocated to each PoE and PoE+ interface module
installed in the chassis. To do so, enter a command such as the following.
device(config)# inline power budget 150000 module 7
This command allocates 150000 milliwatts (150 watts) to the PoE interface module in slot 7. The
command takes effect immediately. The results are displayed in the "power budget" column in the show
inline power detail output. The configuration (inline power budget 150000 module 7) is displayed in the
show running-config output.
Syntax: inline power budget num module slot
The num variable is the number of milliwatts to allocate to the module. Enter a value from 0 through
65535000.
The slot variable specifies the where the PoE or PoE+ module resides in the chassis.
Setting the inline power priority for a PoE port
Each PoE power supply can provide either 1080 or 2380 watts of power, and each PoE port receives a
maximum of 15.4 watts of power per PoE power-consuming device, or a maximum of 30 watts of power
per PoE+ power-consuming device, minus any power loss through the cable. The power capacity of one
or two PoE power supplies is shared among all PoE power consuming devices attached to the FastIron
PoE device.
In a configuration where PoE power consuming devices collectively have a greater demand for power
than the PoE power supply or supplies can provide, the FastIron PoE device must place the PoE ports
that it cannot power in standby or denied mode (waiting for power) until the available power increases.
The available power increases when one or more PoE ports are powered down, or, if applicable, when
an additional PoE power supply is installed in the FastIron PoE device.
When PoE ports are in standby or denied mode (waiting for power) and the FastIron PoE device
receives additional power resources, by default, the device will allocate newly available power to the
standby ports in priority order, with the highest priority ports first, followed by the next highest priority
ports, and so on. Within a given priority, standy ports are considered in ascending order, by slot number
then by port number, provided enough power is available for the ports. For example, PoE port 1/11
should receive power before PoE port 2/1. However, if PoE port 1/11 needs 12 watts of power and PoE
port 2/1 needs 10 watts of power, and 11 watts of power become available on the device, the FastIron
PoE device will allocate the power to port 2/1 because it does not have sufficient power for port 1/11.
You can configure an inline power priority on PoE ports, whereby ports with a higher inline power
priority will take precedence over ports with a low inline power priority. For example, if a new PoE port
Setting the power budget for a PoE interface module
FastIron Ethernet Switch Administration Guide 277
53-1003075-02