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maximum-power (Interface)

Syntax

maximum-power watts;

Hierarchy Level

[edit poe interface (all | interface-name)]

Release Information

Statement introduced in Junos OS Release 9.0 for EX Series switches.

Statement introduced in Junos OS Release 12.2 for ACX2000 routers.

Description

Set the maximum amount of power that the switch can supply to the PoE port.

Note: Although you can set this value when PoE power management is in class mode, it does not establish the maximum power for the port. Instead, the IEEE 802.3af (PoE) or IEEE 802.3at (PoE+) class of the connected device determines the maximum power for the port.

Options

watts—The maximum number of watts that can be supplied to the port.

For EX2200 switches, EX3300 switches, EX4200 switches, EX6200 switches, and EX8200 switches:

Range: 0.0 through 30.0

Default: 15.4 W for ports that support IEEE 802.3af and 30 W for ports that support IEEE 802.3at

For EX3200 switches:

Range: 0.0 through 18.6

Default: 15.4 W

For ACX2000 routers:

Range: 1 through 65 W

Default: 32 W

Note: The maximum-power setting permitted by the CLI might be greater than the maximum power a given PoE port can deliver. For example, the CLI permits you to set any PoE port on an EX8200 line card to 30 W; however, only ports 0 through 11 support 30 W. Similarly, the CLI permits you to set any PoE port on an EX4200 switch to 30 W, but some models of EX4200 switch support only 18.6 W per port. If you configure a maximum-power value that is greater than the maximum power supported by a port, the power allocated to the port will be the maximum supported.

If you use the all option to set maximum-power to a value greater than 15.4 W on all interfaces on an EX8200 line card, the maximum power allocated to all ports is 15.4 W.

Note: Support for a maximum of 18.6 W per port instead of 15.4 W per port on EX3200 switches and P and T models of EX4200 switch requires Junos OS Release 11.1 or later. In addition to requiring an upgrade of Junos OS to Release 11.1 or later, switches that are running a previous Junos OS release require the PoE controller software be upgraded as described in Upgrading the PoE Controller Software. If the controller software is not upgraded and you set maximum-power to a value greater than 15.4 W, the configuration is accepted when you commit it, but the actual power allocated to the port will be 15.4 W.

Note: On ACX2000 routers, the power sourcing equipment (PSE) delivers up to 65 W per port, provided the management mode is set to high-power mode, by using the high-power option at the [edit poe management] hierarchy level. By default, the management mode is set to static. In the static mode, the PSE can deliver power up to 32 W.

Required Privilege Level

system—To view this statement in the configuration.
system-control—To add this statement to the configuration.

 

Related Documentation

 

Published: 2012-12-07

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