Configuring the PoE Controller on EX Series Switches

You can change the management mode or configure a guard band setting for a standalone switch or for all members of an EX3300 Virtual Chassis, an EX4200 Virtual Chassis, an EX4300 Virtual Chassis, or a mixed EX4200 and EX4500 Virtual Chassis that supports PoE, or a mixed EX4300 and EX4600 Virtual Chassis that supports PoE.

To change the management mode, or to configure a guard band setting, use the following command:

• For example, to set the management mode to static and to configure a guard band of 15 W:

  Note:

  If the PoE power budget for the switch is insufficient to provide maximum power to all the PoE ports, we recommend that you do not change the management mode from class to static. If you change the power management mode to static and do not change the other default settings, the PoE controller allocates maximum power to the PoE ports in the order of port number, which means PoE will be disabled on higher-numbered ports when the PoE power budget runs out.

  In class mode, on the other hand, the PoE controller does not allocate power to a port until a powered device is connected. The class of the connected device determines the amount of power allocated. Thus in class mode, any PoE port can be used to power a device and all the PoE ports on the switch can be used as long as the combined power demand does not exceed the PoE power budget.

  Note:

  On EX3200 and EX4200 switches that support enhanced PoE, you must change the management mode from class to static to take advantage of the higher per-port power limits of enhanced PoE.

To enable PoE SNMP traps on a standalone switch or on an specific member of a Virtual Chassis, use the following command:

• For example, to enable PoE SNMP traps on a standalone switch or on member 0 of a Virtual Chassis:

On EX6200 and EX8200 switches, each line card that supports PoE has its own PoE controller, so PoE controller options are configured separately for each line card.

In addition, each line card has its own separate, configurable PoE power budget. The default power budget for a line card is the amount of power needed to supply all PoE ports on the line card with their maximum supported power. Because there might not be enough power available in a switch to supply each PoE line card with the default PoE power budget, you can configure smaller power budgets for one or more line cards, freeing power for other line cards.

To configure a guard band setting, to change the management mode, or to configure the PoE power budget for a specific line card, use the following command:

• For example, to configure a PoE budget of 350 W and a guard band of 15 W on line card 1:

  Note:

  If you configure a PoE power budget for a line card that is smaller than the default power budget, we recommend that you do not change the management mode from class to static. If you change the power management mode to static and do not change the interface default settings, the PoE controller allocates maximum power to the PoE ports in the order of port number. As a result, PoE will be disabled on higher-numbered ports when the PoE power budget runs out.

  In class mode, on the other hand, the PoE controller does not allocate power to a port until a powered device is connected. The class of the connected device determines the amount of power allocated. Thus in class mode, any PoE port can be used to power a device and all the PoE ports on the switch can be used as long as the combined power demand does not exceed the PoE power budget.

To configure the same guard band value, management mode, or PoE power budget for all line cards in a switch, use the following command:

• For example, to configure a PoE budget of 1000 W and static management mode for all line cards in a switch:

  If you configure different settings for a specific line card, those settings override the settings configured with the fpc all statement.

To enable PoE SNMP traps on a line card, use the following command:

• For example, to enable PoE SNMP traps on line card 7: