ZyXEL Communications Dimension ES-3148, User Manual, Page: 29 / 282

Dimension ES-3148 User’s Guide
Chapter 1 Getting to Know Your Switch 27
C
H A P T E R
1
Getting to Know Your Switch
This chapter introduces the main features and applications of the switch.
1.1 Introduction
The ES-3148 is a stand-alone layer 2 Ethernet switch with 48 10/100Mbps ports, two RJ-45
Gigabit (1Gbps or 1000Mbps)/mini-GBIC (Gigabit Interface Converter) combo ports for
uplink, two RJ-45 Gigabit ports and a console port and a management port for local
management. A combo port contains one Gigabit port and one slot for mini-GBIC transceiver
(SFP module).
With its built-in web configurator, managing and configuring the switch is easy. In addition,
the switch can also be managed via Telnet, any terminal emulator program on the console port,
or third-party SNMP management.
1.2 Software Features
This section describes the general software features of the switch.
DHCP Client
DHCP (Dynamic Host Configuration Protocol RFC 2131 and RFC 2132) allows individual
computers to obtain TCP/IP configuration at start-up from a server. You can configure the
switch as a DHCP client to obtain TCP/IP information (such as the IP address and subnet
mask) from a DHCP server. If you disable the DHCP service, you must manually enter the
TCP/IP information.
VLAN
A VLAN (Virtual Local Area Network) allows a physical network to be partitioned into
multiple logical networks. Devices on a logical network belong to one group. A device can
belong to more than one group. With VLAN, a device cannot directly talk to or hear from
devices that are not in the same group(s); the traffic must first go through a router.
Queuing
Queuing is used to help solve performance degradation when there is network congestion.
Two scheduling services are supported: Strict Priority and Weighted Fair Scheduling. This
allows the switch to maintain separate queues for packets from each individual source or flow
and prevent a source from monopolizing the bandwidth.