Enterasys 7100G Series, Руководство по установке оборудования

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PoE Port Status LEDs
D-2 About PoE (Power over Ethernet)
PoE Port Status LEDs
The PoE port status of each 10/100/1000 Mbps RJ45 port is indicated by the two-color RX and TX
LED display for each port. To observe the PoE port status indications, you must switch the device
from the default RX/ TX status mode to the PoE Port status mode using the red PoE button. PoE
status will be displayed on port LEDs for approximately 30 seconds and then returns to link status
display mode as described in section “
LEDs ” on page 3-1.
Allocation of PoE Power to Devices
The 7100G-Series firmware determines the power available in the device for PoE based on power
supply status and power supply redundancy mode. The system calculates and reserves the correct
amount of power required by the device and then makes the balance of power available for PoE.
When any change is made to the power supply status or redundancy mode, the firmware
recalculates the power available for PoE.
The power available for PoE is distributed based on the configured allocation mode:
• Automatic mode (default), in which available power is distributed evenly. Any change in
available power, due to a change in power supply status or redundancy mode, will trigger an
automatic redistribution of power.
• Manual mode, in which the power budget is manually configured, using either CLI
commands or the MIBs. The wattage configured cannot exceed the total power available on
the switch for PoE.
The configured wattage assignment is used to calculate the total available PoE power. If the
total available PoE power changes, a redistribution of available power will occur, applying the
calculated percentage.
If the PoE power needed or requested exceeds the power available, the system will generate an
SNMP trap to notify the system manager.
For more information on configuring allocation mode, see the Enterasys 7100G-Series CLI Reference
Guide .
Power Distribution Upon Power Supply Removal or Addition
When a power supply is removed, the device responds to the decrease in available power by
doing the following:
1. Detecting the power supply removal and recalculating available power.
2. Subtracting the power capacity for its base system from available power.
3. Distributing remaining power equally for PoE.
4. Dropping support to PoE devices as necessary to stay within the programmed maximum
power.
Table D-2 PoE LED Status
Rx LED Tx LED Description
Green Off Port is delivering power.
Amber Off Connected device is requesting power.
Off Amber Connected device has exceeded power limit or faulted.
Off Off No PoE on port.