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S
A
WITCH
RCHITECTURE
N
M
ETWORK
ANAGEMENT
P
-
-E
OWER
OVER
THERNET
The switch employs a wire-speed, non-blocking switching fabric. This
permits simultaneous wire-speed transport of multiple packets at low
latency on all ports. The switch also features full-duplex capability on all
ports, which effectively doubles the bandwidth of each connection.
This switch uses store-and-forward switching to ensure maximum data
integrity. With store-and-forward switching, the entire packet must be
received into a buffer and checked for validity before being forwarded. This
prevents errors from being propagated throughout the network.
O
PTIONS
With a comprehensive array of LEDs, the switch provides "at a glance"
monitoring of network and port status. The switch can be managed over
the network with a web browser or Telnet application, or via a direct
connection to the console port. The switch includes a built-in network
management agent that allows it to be managed in-band using SNMP or
RMON (Groups 1, 2, 3, 9) protocols. It also has an RJ-45 serial port (DB-9
connector) for out-of-band management. A PC may be connected to this
port for configuration and monitoring out-of-band via the supplied RJ-45 to
RS232 (DB-9 connector) serial cable.
For a detailed description of the management features, refer to the User
Manual.
The first six ports (ports 1~6) of the ES-3024GP's 24 10/100/1000 Mbps
ports support the IEEE802.3at Draft standard version that enables DC
power to be supplied to attached devices using wires in the connecting
Ethernet cable. The rest of the ES-3024GP's 24 10/100/1000 Mbps ports
(ports 7~24) support the normal PoE (802.3af). The total PoE power
delivered by all ports cannot exceed 185W power budget.
Any PoE-compliant device attached to a port can directly draw power from
the switch over the Ethernet cable without requiring its own separate
power source. This capability gives network administrators centralized
power control for devices such as IP phones and wireless access points,
which translates into greater network availability.
For each attached PoE-compliant device, the switch automatically senses
the load and dynamically supplies the required power. The switch delivers
power to a device using the wire pairs in UTP or STP cable. The first six
ports on the switch can provide up to 30 W of power, while the remaining
ports (ports 7~24) can provide 15.4W of power.
– 17 –
| Introduction
C
1
HAPTER
Switch Architecture
ES-3024G/3024GP
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