Switch Features - HP 2920 Installation And Getting Started Manual

Switch Features

The features of the HP 2920 Switches include:
■ Network ports as described under
• 20 or 44 auto-sensing 10/100/1000BASE-T with Auto-MDIX.
• Four dual-personality ports – either the auto-sensing 10/100/
1000BASE-T RJ-45 or the SFP slot can be used for each port.
■ One module slot is provided in the back of the switches to support a
stacking module to provide connectivity to other HP 2920 switches with
stacking modules. See
25, the HP 2920 Advanced Traffic Management Guide for more
information about stacking.
Two 10G Expansion Module slots to provide additional high-speed
■
network connectivity and a variety of network connectivity options.
■ Power over Ethernet (PoE+) operation—the HP 2920-24G-PoE+ and HP
2920-48G-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.
A replaceable internal power supply.
■
■ Plug-and-play networking—all ports are enabled—just connect the
network cables to active network devices and your switched network is
operational.
■ Auto MDI/MDI-X on all twisted-pair ports (10/100/1000BASE-T on the
switch front, and 10GBASE-T – available on the optional 10G module),
meaning that all connections can be made using straight-through
twisted-pair cables. Cross-over cables are not required, although they
will also work. The pin operation of each port is automatically adjusted
for the attached device: if the switch detects that another switch or hub
is connected to the port, it configures the port as MDI; if the switch detects
that an end-node device is connected to the port, it configures the port as
MDI-X. (See the appendices for recommended or required cabling.)
Introducing the HP 2920 Switches
"Network Ports" on page
"Stacking Information and Topologies" on page 2-
Switch Features
1-4:
1-19