poe-pse

To enable and disable the PoE PSE port functionality, configure forcing power on the Ethernet port without negotiation, legacy detection option, choose a PoE PSE mode, assign a name to a PoE PSE port, set up the power budget or power priority of the individual ports, use the poe-pse command in Port Configuration Mode.

poe-pse

poe-pse
{ | | { | enable | | | disable | } }
{ | | clear-counters }
{ | | force-power | { | enable | | | disable | } }
{ | | legacy-detect | { | enable | | | disable | } }
{ | | mode | { | poe++60W | | | poe++30W | | | poe++15W | | | poe+4P60W | | | poe+A30W | | | poe+B30W | } }
{ | | name | < | string(32) | > }
{ | | power-budget | { | usage | | | class | } }
{ | | priority | { | critical | | | high | | | low | } }

Parameters

Parameter Type Description
enable   Enter to enable  PoE PSE Port functionality.
disable   Enter to disable  PoE PSE chassis functionality.
clear-counters   Enter to clear the counters.
force-power   Enter to force power on the Ethernet port without negotiation.
enable   Enter to enable  forcing power on the Ethernet port without negotiation. By default,  forcing power on the Ethernet port without negotiation is disabled. This mode requires PoE PSE mode PoE++ 60W as it can supply up to 60W and will switch to this mode when the command is issued if not already in this mode as indicated.
disable   Enter to disable  forcing power on the Ethernet port without negotiation. By default,  forcing power on the Ethernet port without negotiation is disabled.
legacy-detect   Enter to choose a legacy detection option.
enable   Enter to enable detection of older capacitive detectable devices that do not adhere to the IEEE 802.3 standard and require some extra detection timing.
disable   Enter to disable of older capacitive detectable devices that do not adhere to the IEEE 802.3 standard and require some extra detection timing. By default, legacy-detect is disabled.
mode   Enter to choose a PoE PSE mode. The PoE PSE mode allows the user to setup to which IEEE standard the PoE controller will conform to and set the maximum power that can be drawn. 6 options are available.
poe++15W   bt/at/af 4-Pairs 15W max
poe++30W   bt/at/af 4-Pairs 30W max; This is the default mode.
poe++60W   bt/at/af 4-Pairs 60W max
poe+4P60W   Pre-bt 4-Pairs 60W max
poe+A30W   at/af ALT-A 30W max
poe+B30W   at/af ALT-B 30W max
name   Use this command to assign a name to the PoE PSE port to make it easier to identify what device is connected.
string(32) string Enter a name for the PoE PSE port. It is a string of 32 characters.
power-budget  

Enter to set up the power budget for the individual ports. The PoE PSE power budget option allows the user to select what port power value is used to calculate when too much power is drawn and the ports need to be powered down.

The “class” based power budget option will provide for a more stable system but can be inefficient. For example, if eight Class 6 devices are connected to a single line module, only four will be powered when in “class” based power budget mode because of the power limit of the line module.

However, if these devices only draw 20W each, all eight devices can be powered in “usage” power budget mode.

Devices that use a constant amount of power can be candidates for “usage”-based power budget, while devices that use variable amount of power would probably be better under the “class”-based power budget.
class   Enter to reserve the class power as the power budget. This is the default power budget.
usage   Enter to only count usage power as the power budget.
priority   Enter to set up the power priority of the individual ports. The PoE PSE priority is used to decide which port to power down when there is not enough power for all the ports either on the chassis (reaching maximum external power level) or on a line module.
Note:

The low priority port will be shut down first, followed by the high priority port, then followed by the critical ports. Within these levels, smaller port numbering has higher priority than larger port numbering.
critical   Enter to set the PoE PSE port priority as critical.
high   Enter to set the PoE PSE port priority as high.
low   Enter to set the PoE PSE port priority as low. This is the default.

Mode

Port Configuration Mode

Examples

To enter Port Configuration Mode, perform the following:

iS5Comm (config)# interface gigabitethernet 0/2

iS5Comm (config -if)

or

iS5Comm interface range gigabitethernet 0/2-4

iS5Comm (config - if - range)

By default, the PoE PSE port functionality is disabled. To enable it, perform the following command:

iS5Comm (config-if)# poe-pse enable

To assign a PoE PSE port name such as “Camera 1”, perform the following command:

iS5Comm (config-if)# poe-pse name Camera-1

To set a port to use up to 60W of power, perform the following command:

iS5Comm (config-if)# poe-pse mode poe++60W

The default mode is “poe++30W” which conforms to IEEE 802.3bt with up to 30W of power on four power pairs. Class 1 to Class 8 (or up to Class 5 for dual signature PD) PoE connections can be maintained in PoE++ modes if the selected power limit is not exceeded (Class 0 will be assigned to Class 3 as per the IEEE 802.3bt standard). Please note the following limitation for two-pair PoE+ modes (poe+A30W and poe+B30W): Class 0 to Class 2 will be assigned to Class 3 and switching to or from these PoE PSE modes can cause temporary power loss on other powered PoE ports.

To set a port to high priority, perform the following command:

iS5Comm (config-if)# poe-pse priority high

By default, the port priority is “low”.

To set “usage” based power budget mode, perform the following command:

iS5Comm (config-if)# poe-pse power-budget usage

To detect older capacitive detectable devices that do not adhere to the IEEE 802.3 standard require some extra detection timing that can be enabled with the following command:

iS5Comm (config-if)# poe-pse legacy-detect enable

To force power on the Ethernet port without negotiation, perform the following:

iS5Comm (config-if)# poe-pse force-power enable
Defaulting to PoE PSE Mode PoE++ 60W required when Force Power is enabled

iS5Comm (config -if)

Clear Command

PoE PSE counters can be cleared on a port level with the “poe-pse clear-counters” command as follows:

iS5Comm configure terminal

iS5Comm (config)# interface gigabitethernet 0/16

iS5Comm (config-if)# poe-pse clear-counters

Parent topic: PoE