Aerohive BR200-WP, Hardware Reference Manual

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Hardware Reference Guide 75
P
RODUCT
O
VERVIEW
Ethernet Ports
The SR2024 has 24 10/100/1000-Mbps Ethernet RJ45 LAN ports (ETH 1 through ETH 24). These ports are
compatible with 10/100/100Base-T/TX and negotiate half and full duplex connections with the connecting
device. The ports are auto-sensing and adjust to straight-through and crossover Ethernet cables
automatically. Ports 1 through 8 support PoE (power over Ethernet) and PoE+.
The Ethernet port pin assignments use the TIA/EIA-568-B standard (see
"Ethernet Port Pin Assignments" on
page 109 ). The ports accept standard cat3, cat5, cat5e, or cat6 Ethernet cable, and autosensing
capabilities allow the wiring termination in the Ethernet cable to be either straight-through or crossover.
PoE and PoE+ Ports
The SR2024 offers PoE (power over Ethernet) or PoE+ on ports ETH1 through Eth8 to power PDs (powered
devices) such as VoIP phones, wireless access points, and network cameras. These ports are IEEE802.3af and
IEEE802.3at PSE (power sourcing equipment) compliant, as described here:
•
802.3af PoE provides up to 12.95 W of DC power to each device (this rate reflects normal power loss
through the cables). 802.3af meets the power demands of PoE Class 0, 1, 2, and 3 devices.
• 802.3at PoE (also referred to as PoE+) provides up to 25.5 W of DC power to each device (this rate
reflects normal power loss through the cables). 802.3at meets the power demands of PoE Class 4
devices.
802.3af is the default setting for all ports, but you can configure up to six ports for 802.3at to support devices
that require more power. When six ports are configured for 802.3at, the remaining two PoE ports are shut
down to maintain the 802.3 power budget (these ports will still function as standard Ethernet ports).
Speed LED mode When you select Speed mode, the port LEDs indicate the port operating speed (100
or 1000 Mbps). See "Changing the Temperature and Fan Speed Alarm Thresholds"
on page 79
PoE LED When you select PoE mode, the port LEDs indicate whether or not the port is
delivering power over Ethernet (ports 1 through 8). See
"Changing the Temperature
and Fan Speed Alarm Thresholds" on page 79 .
Ethernet ports The 24 10/100/1000-Mbps RJ45 Ethernet ports act as LAN interfaces, are compatible
with 10/100/1000Base-T/TX, and automatically negotiate half-and full-duplex
connections with the connecting device. The ports are auto-sensing and adjust to
straight-through and crossover Ethernet cables automatically.
On the SR2024 switch, ports ETH1 through ETH8 provide 802.3af and 802.3at PoE
support to powered devices. See "Ethernet Ports" on page 75 .
SFP uplink ports The SR2024 switch has four 1-Gbps SFP (small form pluggable) uplink ports that
accommodate fiber or copper industry-standard modules, which you can order
from Aerohive. See "SFP Uplink Ports" on page 77
.
Power cord The power cord allows you to connect the switch to a standard AC power source.
Because the switch does not have an on/off switch, it automatically powers on
when you connect it to a power source. A retention clip ships with the switch that
you can use to secure the power cord.
Fans The cooling fans are located on the right side panel of the device (when facing the
front panel). You can view fan status and temperature level in HiveManager. See
"Fans" on page 79 .
For PoE ports, especially with 803.2at, Aerohive recommends using cat5 or cat 6 Ethernet cable.
Table 1 SR2024 hardware component descriptions (Continued)
Component Description