Alcatel-Lucent OmniSwitch 6465 Hardware User's Manual page 75

Managing Power over Ethernet (PoE) Understanding Guard Band
The Guard Band functionality does not apply to PDs that are already powered up. However, priority disconnect
will apply if there's not enough power to power all PDs in the case of the power budget being reduced, such as
the removal of a power supply.
Please refer to the "Understanding Priority Disconnect" on page 4-10 for additional details.
OmniSwitch 6465 Hardware Users Guide December 2019 page 4-9