Getting To Know Your Switch; Introduction; Software Features - ZyXEL Communications ZyXEL Dimension ES-2048 User Manual

Getting to Know Your Switch

This chapter introduces the main features and applications of the switch.

1.1 Introduction

The ES-2048 is a stand-alone layer 2 Ethernet switch with 48 10/100Mbps ports, 2 dual
personality interfaces for uplink as well as a console port and a management port for local
management. A dual personality interface includes one Gigabit port and one slot for mini-
GBIC transceiver (SFP module) with one port active at a time.
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.
Three scheduling services are supported: Strict Priority Queuing (SPQ), Weighted Round
Robin (WRR) and Weighted Fair Schedule (WFS). This allows the switch to maintain separate
queues for packets from each individual source or flow and prevent a source from
monopolizing the bandwidth.
Chapter 1 Getting to Know Your Switch
C
H A P T E R
ES-2048 User's Guide
1
29