xStack
®
DGS-3400 Series Layer 2 Gigabit Managed Switch CLI Manual
306
39
P
O
E
C
OMMANDS
The xStack
®
DGS–3426P supports Power over Ethernet (PoE) as defined by the IEEE 802.3af specification. Ports 1–24 supply 48
VDC power to PDs over Category 5 or Category 3 UTP Ethernet cables. The xStack
®
DGS–3426P follows the standard PSE
pinout
Alternative A
, whereby power is sent out over pins 1, 2, 3 and 6. The xStack
®
DGS–3426P works with all D
–
Link 802.3af
capable devices.
The xStack
®
DGS–3426P includes the following PoE features:
•
The auto–discovery feature recognizes the connection of a PD (Powered Device) and automatically sends power to it.
•
The auto–disable feature will occur under two conditions: first, if the total power consumption exceeds the system
power limit; and second, if the per port power consumption exceeds the per port power limit.
•
The active circuit protection feature automatically disables the port if there is a short. Other ports will remain active.
PDs receive power according to the following classification:
Class
Max power used by PD
0 0.44
to
12.95W
1 0.44
to
3.84W
2 3.84
to
6.49W
3 6.49
to
12.95W
PSE provides power according to the following classification:
Class
Max power provided by PSE
0 15.4W
1 4.0W
2 7.0W
3 15.4W
The PoE commands in the Command Line Interface (CLI) are listed (along with the appropriate parameters) in the following table.
Command Parameters
config poe system
{units [<unitlist> | all]} {power_limit <value 37–370> | power_disconnect_method
[deny_next_port | deny_low_priority_port] management_mode [power_limit | auto]} (1)
config poe ports
[all | <portlist>] {state [enable | disable] | priority [critical | high | low] | power_limit [class_0
| class_1 | class_2 | class_3 | user_define <value 1000–16800>]} (1)
show poe ports
{<portlist>}
show poe system
{units <unitlist>}
Each command is listed in detail in the following sections.
