SMC Networks SMC6824M manual Configuring Power over Ethernet

CONFIGURING POWER OVER ETHERNET

Configuring Power over Ethernet

The 24 10/100 Mbps ports on the SMC6824MPE and SMC6826MPE support the IEEE 802.3af Power-over-Ethernet (PoE) standard that enables DC power to be supplied to attached devices over the unused pairs of wires in the connecting Ethernet cable. Any 802.3af compliant device attached to a port can directly draw power from the switch over the Ethernet cable without requiring its own separate power source. This capability gives network administrators centralized power control for devices such as IP phones and wireless access points, which translates into greater network availability.

A maximum PoE power budget for the switch (power available to all switch ports) can be defined so that power can be centrally managed, preventing overload conditions at the power source. If the power demand from devices connected to the switch exceeds the power budget setting, the switch uses port power priority settings to limit the supplied power.

In the example below, the power mainpower maximum allocation CLI command is used to set the PoE power budget for the switch.

(Range: 37 - 375 watts). If devices connected to the switch require more power than the switch budget, the port power priority settings are used to control the supplied power. See “Setting a Switch Power Budget” on page 3-147for details.

Console(config)#power mainpower maximum allocation 200	4-91
Console(config)#

PoE is enabled for all ports by default. Power can be disabled for a port by using the no form of the power inline CLI command, as shown in the example below.

Console(config)#interface ethernet 1/2	4-131
Console(config-if)#no power inline	4-70
Console(config-if)#

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