Configuring PoE (CLI Procedure)
Power over Ethernet (PoE) ports supply electric power over the same ports that are used to connect network devices. These ports allow you to plug in devices that require both network connectivity and electric power, such as voice over IP (VoIP) phones, wireless access points, and some IP cameras.
For EX Series switches that support PoE ports, the factory default configuration enables PoE on the PoE-capable ports, with default settings in effect. You might not have to do any additional configuration if the default settings work for you. Table 1 shows the PoE options and their default settings for the switch as a whole and for the PoE interfaces.
Table 1: PoE Configurable Options and Default Settings
Option | Default | Description |
|---|---|---|
Switch Options | ||
0 W | Reserves up to 19 W out of the PoE power budget to be used in the case of a spike in PoE power consumption. | |
class | Sets the PoE power management mode for the switch:
| |
Not included in default configuration | When included in the configuration, enables PoE SNMP traps. | |
Interface Options | ||
low | Sets an interface’s power priority to either low or high. If power is insufficient for all PoE interfaces, the low priority interfaces are shut down before the high priority interfaces. Among interfaces that have the same assigned priority, the power priority is determined by port number, with lower- numbered ports having higher priority. | |
Not included in default configuration | When included in the configuration, enables the logging of power consumption records on an interface. Logging occurs every five minutes for one hour unless you specify a different interval or duration. | |
15.4 W (for switches that support IEEE 802.3af) 30.0 W (for switches that support IEEE 802.3at) | Sets the maximum power that can be delivered by a PoE interface. The maximum power allowed is the same as the default—either 15.4 W for switches that support IEEE 802.3af (PoE) or 30.0 W for switches that support IEEE 802.3af (PoE+). This setting is ignored if the power management mode is class. | |
Not included in default configuration | When included in the configuration, disables PoE on the interface. The interface maintains network connectivity but no longer supplies power to a connected powered device. Power is not allocated to the interface. | |
To configure PoE:
- To change power management mode from the default
class mode to static mode:
[edit poe] user@switch# set management static
Note: On an EX2200 switch, we recommend that you do not change the default management mode. The PoE power budget for an EX2200 switch is 405 W. If you change the power management mode to static mode, the PoE controller allocates 30.0 W for each port on the EX2200 switch, which means only 13 ports receive power. With the default priority settings, the 13 ports that receive power are the first 13 ports.
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 405 W.
- To reserve a specified wattage of power in case
of a spike in PoE consumption:
[edit poe] user@switch# set guard-band 15
- To configure a number of interfaces with
the same settings (for example, to enable telemetry collection on
all interfaces):
[edit poe] user@switch# set interface all telemetries
- To configure individual interfaces with
different settings:
[edit poe] user@switch# set interface ge-0/0/0 priority high telemetries duration 24 [edit poe] user@switch# set interface ge-0/0/1 [edit poe] user@switch# set interface ge-0/0/7 disable
When you configure an individual interface, its configuration overrides any settings you configure with the set poe interface all command. For example, ge-0/0/1 in the example above retains the default settings, regardless of any settings configured with the set poe interface all command.
