Optional) Installing A Second Power Supply; Poe/Poe+ Operation - HP Aruba 3810M Series Installation And Getting Started Manual

Stacking Note:
If you are stacking your 3810M switches, then the first switch you should power on is the switch
that you want to be the stack Commander. The second switch that you power on should be the
one that you want to be the stack Standby. For the other switches in the stack, their member ID
will be determined by the order in which they are booted. For more information, see
Information and

9. (Optional) Installing a Second Power Supply

There are three types of power supplies that can be installed:
Aruba 250W Power Supply, (JL085A, Aruba X371 250W 100-240VAC to 12VDC PS) is
used with the non-PoE switches and is keyed so that it cannot be used in the PoE/PoE+
switches.
The 250W power supply provides power to operate the switch. Installing a second power
supply can provide power to the switch in case the initial power supply fails. If the power
supplies are plugged into different AC power sources, then redundant power can be supplied
in case of loss of one of the AC power sources.
Aruba 680W PoE+ Power Supply, (JL086A, Aruba X372 680W 100-240VAC to 54VDC
PS) used with the PoE/PoE+ switches and is keyed so that it cannot be used in the non-PoE
switches.
Aruba 1050W PoE+ Power Supply, (JL087A, Aruba X372 1050W 100-240VAC to 54VDC
PS) is used with the PoE/PoE+ switches and is keyed so that it cannot be used in the non-PoE
switches.
The 680W and 1050W power supplies provide two types of power to the PoE/PoE+ switches:
The 680W and 1050W power supplies provide power to operate the switch. Installing a
second power supply can provide power to the switch in case the initial power supply fails.
If the power supplies are plugged into different AC power sources, then redundant power
can be supplied in case of loss of one of the AC power sources.
Power-over-Ethernet (PoE/PoE+) power. The power supplies, supply PoE/PoE+ power to
the switch. Should one of the power supplies fail, the second power supply will supply the
needed PoE/PoE+ power to continue PoE operation. For the 48 port switches, the second
power supply's PoE/PoE+ power is additional power made available to the switch's ports.
For further information regarding the power supply's PoE/PoE+ capabilities, see the HPE
Power over Ethernet (PoE/PoE+) Planning and Implementation Guide, on the Hewlett
Packard Enterprise website at http://www.hpe.com/networking/support.

PoE/PoE+ Operation

It is important to understand the PoE/PoE+ power requirements of the switches because if the
PoE/PoE+ power is not planned and implemented correctly the end devices connected to the
switch ports may not receive power if an internal switch PoE/PoE+ power supply should fail.
For further information regarding the PoE/PoE+ capabilities, see the HPE Power over Ethernet
(PoE/PoE+) Planning and Implementation Guide, on the Hewlett Packard Enterprise website at
http://www.hpe.com/networking/support.
Topologies.
Stacking
Installation Procedures 43