Powering The Access Point; Redundant Power Over Ethernet - Cisco Catalyst 9136I Series Hardware Installation Manual

Powering the Access Point

Powering the Access Point

Caution
The AP can be powered only through PoE using the following:
• 802.3bt: Any 802.3bt-compliant switch port or Cisco Power Injector AIR-PWRINJ7=
• Cisco Universal PoE (Cisco UPoE)
• 802.3at (PoE+): Any 802.3at (30.0 W)-compliant switch port
• 802.3af: Any 802.3af (15.4 W)-compliant switch port
• Supports dual-PoE hitless redundant power functionality.

Redundant Power over Ethernet

The AP supports PoE power input on both the 5-GbE ports. The dual-PoE hitless redundant power feature
enables the AP to support hitless failover when the powered port experiences a power failure. When the PoE
is present on both ports, only one port draws power, and the other is in standby mode. The AP switches over
to the standby port in a hitless transition if the active PoE port fails.
The hitless failover functions correctly when both PSE ports are of the same type, that is, 802.3at x2 or 802.3bt
x2. You can use the switch-based PSE ports and power injectors in this configuration.
Note
Cisco Catalyst 9136I Series Access Point Hardware Installation Guide
20
Ensure that the AP is powered using a Underwriters' Laboratories-compliant (UL-compliant) PoE power
source. You must connect the unit only to the PoE network, without routing to the outside plant.
Note If 802.3af is used, all the radios get switched off, the Ethernet port is downgraded
to 1 GbE, and the USB port is shut off.
The dual-PoE operation requires even power input. The AP may reboot if there is drop in power at one of the
PoE ports. A UPoE providing 60 W is recommended to ensure that all the radios are operational, with all the
spatial streams active, and the necessary Ethernet speed to operate in full 5G mode. To avoid AP rebooting
because of low power in any two ports, use only one Ethernet port to power the AP.
Installation Overview