Enabling The Detection Of Poe Power Requirements Advertised Via Cdp; Enabling The Detection Of Poe Power Requirements Advertised Via Cdp; Configuration Considerations; Command Syntax - Foundry Networks FESX Manual

Foundry Configuration Guide for the FESX, FSX, and FWSX
FastIron SuperX Router(config)# interface e 1/1
FastIron SuperX Router(config-if-e1000-1/1)# inline power
After entering the above commands, the console will display the following message:
FastIron SuperX Router(config-if-e1000-1/1)# PoE Info: Power enabled on port 1/1.
Syntax: [no] inline power
Use the no form of the command to disable the port from receiving in-line power.
NOTE: The FSX with POE can automatically detect whether or not a power consuming device is 802.3af-
compliant. Therefore, the CLI command inline power legacy-powerdevice, which is used on FES POE devices
to configure 802.3af non-compliant devices, does not apply on the FSX POE.
Enabling the Detection of POE Power Requirements
Advertised via CDP
Many power consuming devices, such as Cisco's VOIP phones and other vendors' devices, use CDP to advertise
their power requirements to power sourcing devices, such as Foundry's POE devices. Foundry's power
consuming devices are compatible with Cisco's and other vendors' power consuming devices, in that they can
detect and process power requirements for these devices automatically.

Configuration Considerations

• This feature is supported in FSX POE devices running software release 02.2.00 or later
• If you configure a port with a maximum power level or a power class for a power consuming device, the power
level or power class takes precedence over the CDP power requirement. Therefore, if you want the device to
adhere to the CDP power requirement, do not configure a power level or power class on the port.
• The FSX POE will adjust a port's power only if there are available power resources on the device.

Command Syntax

To enable the Foundry device to detect CDP power requirements, enter the following commands:
FastIron SuperX Switch# config t
FastIron SuperX Switch(config)# cdp run
Syntax: [no] cdp run
Use the no form of the command to disable the detection of CDP power requirements.

Setting the Maximum Power Level for a POE Power Consuming Device

When POE is enabled on a port to which a power consuming device is attached, by default, the Foundry POE
device will supply 15.4 watts of power at the RJ45 jack, minus any power loss through the cables. For example, a
POE port with a default maximum power level of 15.4 watts will receive a maximum of 12.95 watts of power after
2.45 watts of power loss through the cable. This is compliant with the IEEE 802.3af specification for delivering in-
line power. Devices that are configured to receive less POE power, for example, 4.0 watts of power, will
experience a lower rate of power loss through the cable.
If desired, you can manually configure the maximum amount of power that the Foundry POE device will supply at
the RJ45 jack. You can specify from 1 to 15.4 watts of maximum power for each power consuming device
connected to the switch.

Configuration Notes

• This feature is supported in FSX POE devices running release 02.2.00 or later
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