Switch Features - HP E3800-24G-2SFP+ Installation And Getting Started Manual

Introducing the E3800 Switches

Switch Features

1-18
Switch Features
The features of the E3800 Switches include:
■ Combinations of fixed 10/100/1000-T and 10-Gigabit ports, and SFP/SFP+
ports, as described under "Network Ports" on page 1-6.
Selected switch models feature XG ports that are compliant with IEEE
■
802.3an standards and provide 1000-T and 10GBase-T connectivity. See
the appendices for cabling recommendations and requirements.
■ One module slot is provided in the back of the switches to support a
stacking module to provide connectivity to other E3800 switches with
stacking modules. See
23, the E3800 Advanced Traffic Management Guide for more
information about stacking.
Power over Ethernet (PoE+) operation—the E3800-24G-2SFP+-PoE+ and
■
E3800-48G-4SFP+-PoE+ switches are IEEE 802.3at standard compliant
and provide up to 30 W per port to power IP phones, wireless access
points, web cameras, and more. For more information, see the HP Power
over Ethernet (PoE/PoE+) Planning and Implementation Guide which
is on the HP Web site, www.hp.com/networking/support.
The switches support 802.3af and 802.3at standard devices and some pre-
standard PoE devices. For a list of these devices, see the FAQs (Frequently
Asked Questions) for your switch model. PoE is disabled by default and
must be enable for use. (For instructions, see the Management and
Configuration Guide for your switch at
www.hp.com/networking/support.
■ The option to have one or two internal power supplies.
A second power supply may support redundant power or additional PoE+
power. If one of the internal power supplies fails, the second power supply
will immediately provide power necessary to keep the switch running,
including PoE+ power on an allocated basis.
If maximum PoE+ power is being used on the 48 port PoE+ switch, the
second power supply is needed for PoE+ power and in this case there is
no PoE power redundancy, however system power will always be main-
tained. On a power supply failure, the system will drop PoE power on
ports based on user priority, to maintain system power. For more infor-
mation on the power supplies see
■ Plug-and-play networking—all ports are enabled—just connect the
network cables to active network devices and your switched network is
operational.
"Stacking Information and Topologies" on page 2-
page 1-15