Aerohive BR200-WP, Hardware Reference Manual

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Chapter 7 The SR2024 Switch
76 Aerohive
To change the power setting, first add 803.2af and 802.3at PSE profiles to your network policy in
HiveManager and assign them to ports as needed. You can change the profile at any time.
For more information about how to create PSE profiles, see the HiveManager Help.
Guard Band Power Reserve
The SR2024 switch has guard band capability that reserves a specified amount of power out of the PSE
power budget to prevent power overruns and allow for power spikes. For example, the maximum power
budget for the SR2024 is 195 W. If the guard band is set to 10 W, then when the consumed power level
reaches 185 W, no additional devices can receive power.
Guard band is enabled on the switch by default, with a default power setting of 22 W.
You can view or change guard band settings in HiveManager by navigating to
Monitor > Switches > View
Device Configuration
. Click the name of the switch. In the dialog box that appears, scroll down to the
Optional Settings
section, and expand
PSE Settings
.
You can also view and change the guard band settings using the following CLI commands:
To view current guard band status, enter:
show pse
To change the guard band power allocation, enter:
pse guard band <number>
To disable the guard band feature, enter:
no pse guard band
PoE Power Management
The switch supports static and dynamic PoE power management:
•
Static
: Using static power management, the maximum power delivered by each port is determined by
the power threshold (802.3af or 802.3at) that is configured on that port. If more power is required than
the ports can deliver, the switch shuts down lower priority ports and transfers their power allotment to
higher priority ports.
•
Dynamic
(default): Using dynamic power management, the switch measures the power consumption
of each port in real-time. The total amount of power delivered by all ports cannot exceed the PSE power
budget. If the power requirements exceed the PSE budget, the switch shuts down lower priority ports
and transfers the power allotments to higher priority ports until the budget is met.
To change the power management setting on the SR2024 switch in HiveManager, go to
Monitor > Devices
> Switches
. Select the check box for the switch, select
Dynamic
or
Static
from the
Power Management
Type
drop-down box in
Optional Settings > PSE Settings
, and then click
Save
.
Port Priority
By default, all ports have priority enabled, with a priority setting of low. There are three port priorities: low,
high, and critical.
If there is no priority setting applied to a port or if multiple ports have the same priority, the switch gives the
port with the lowest number the higher priority.
Port priorities are assigned and changed using the PSE port profiles that you create in HiveManager. Add PSE
profiles for low, high, and critical in your network policy in HiveManager. You can change the priority for a
port by changing its PSE profile.
The combined amount of power delivered by all ports cannot exceed the PSE power budget.