ZyXEL Communications ZyAir G-2000 PlusV2 User Manual page 42

ZyXEL G-2000 Plus v2 User's Guide
DHCP (Dynamic Host Configuration Protocol)
DHCP (Dynamic Host Configuration Protocol) allows the individual clients (computers) to
obtain the TCP/IP configuration at start-up from a centralized DHCP server. The ZyXEL
device has built-in DHCP server capability enabled by default. It can assign IP addresses, an
IP default gateway and DNS servers to DHCP clients. The ZyXEL device also acts as a
surrogate DHCP server (DHCP Relay) where it relays IP address assignment from the actual
real DHCP server to the clients.
Multicast
Traditionally, IP packets are transmitted in two ways - unicast or broadcast. Multicast is a third
way to deliver IP packets to a group of hosts. IGMP (Internet Group Management Protocol) is
the protocol used to support multicast groups. The latest version is version 2 (see RFC 2236).
The ZyXEL device supports versions 1 and 2.
IP Alias
IP Alias allows you to partition a physical network into logical networks over the same
Ethernet interface. The ZyXEL device supports three logical LAN interfaces via its single
physical Ethernet LAN interface with the ZyXEL device itself as the gateway for each LAN
network.
IP Policy Routing
IP Policy Routing provides a mechanism to override the default routing behavior and alter
packet forwarding based on the policies defined by the network administrator.
SNMP
SNMP (Simple Network Management Protocol) is a protocol used for exchanging
management information between network devices. SNMP is a member of the TCP/IP
protocol suite. Your ZyXEL device supports SNMP agent functionality, which allows a
manger station to manage and monitor the ZyXEL device through the network. The ZyXEL
device supports SNMP version one (SNMPv1) and version two c (SNMPv2c).
Full Network Management
The embedded web configurator is an all-platform web-based utility that allows you to easily
access the ZyXEL device's management settings. Most functions of the ZyXEL device are
also software configurable via the SMT (System Management Terminal) interface. The SMT
is a menu-driven interface that you can access from a terminal emulator over a telnet
connection.
Logging and Tracing
• Built-in message logging and packet tracing.
• Unix syslog facility support.
42 Chapter 1 Getting to Know Your Device