HP ProCurve 1600M Посібник з планування та впровадження - Сторінка 20

Planning

Disconnecting a PD from a port causes the switch to stop providing power to

that port and makes that power available to other ports configured for PoE

operation.

Number of PDs per Switch

The number of PDs supported per switch depends on the power allocation

and how much power each PD uses and how much power is left. The following

examples show the power consumption in some typical configurations.

Planning Your PoE Configuration

This section assists you in building a reliable and, if required, redundant PoE

configuration. Using the following examples you can plan, build, and connect

your PoE devices quickly and easily.

There are three configurations: one for the HP ProCurve Switch 2626-PWR,

one for the HP ProCurve 2650-PWR, and one for the HP ProCurve Switch xl

PoE Module. Each shows a complete configuration including an optional HP

600 RPS/EPS or HP 610 EPS unit. A table shows the PoE power available to

connected PoE devices when using just the switch or when using the switch

and either the HP 600 RPS/EPS or HP 610 EPS unit. The tables show the

available power when the HP 600 RPS/EPS or HP 610 EPS unit is providing

PoE power to connected switch devices.

Once you have selected your specific configuration and the PoE power

provided, you then add up the maximum amount of power each of your IEEE

802.3af-compliant devices require (use maximum power in watts, usually

found on a product's data sheet). Adjust this total maximum power figure by

adding 15% to account for possible line loss. This value must be less than the

maximum power available shown in the table for your configuration.

If you are planning to include redundant power in your configuration you need

to determine which PoE devices must receive redundant PoE power, then total

their power requirements as explained in the paragraph above. The maximum

power figure must be less than the maximum power available when the switch

is powered by the HP 600 RPS/EPS or the HP 610 EPS unit, taking into

consideration the number of switches the HP 600 RPS/EPS or HP 610 EPS unit

is powering.

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