Objective

Power over Ethernet (PoE) allows a switch to provide power to connected devices via the same Ethernet cable that transmits data. This eliminates the need for a separate power cord to power devices such as IP phones and wireless access points.

The objective of this document is to explain how to configure the PoE properties on a 200/300 Series Managed Switch.

Applicable Devices

• SF/SG 200 and SF/SG 300 Series Managed Switches

Software Version

• 1.3.0.62

Configuration of PoE Properties

Step 1. Log in to the web configuration utility and  choose Port Management > PoE > Properties. The PoE Properties page opens:

Step 2.In the Power Mode field, click the radio button that corresponds with the PoE mode you would like to use.

• Port Limit — The total amount of power that the switch will provide is decided by the administrator.

• Class Limit — The switch will provide as much power as the powered device requests.

Step 3. Check the Enable check box in the Traps field to allow the switch to send warning messages (traps) when the power output exceeds a predefined threshold.

Note: SNMP must be enabled and there must be at least one SNMP Notification Recipient available if you want to use traps. Refer to Simple Network Management Protocol (SNMP) Notification Filter and Notification Recipient Configuration on 300 Series Managed Switches for more information.

Step 4. In the Power Trap Threshold field, enter a percentage of the power limit that will cause a trap message to be sent.

The following information is displayed at the bottom of the Properties page.

• Nominal Power — Total amount of power that the switch can supply.

• Consumed Power — Amount of power currently being consumed by PoE ports.

• Available Power — Amount of power that can still be given.  Available power is the difference between nominal power and consumed power.