Understanding The Installation Environment; Understanding Ip Addressing - Nortel BayStack 820 Installation And Reference Manual

• Private IP addressing scheme to prevent devices on your LAN from being
access by unauthorized users from outside your network
• Password protection for the console, Telnet, and BayStack 820 ISDN Router
Manager software
• DES encryption support for inter-office, non-VPN connections
• DES encryption support with Point-to-Point Protocol/Encryption Control
Protocol (PPP/ECP) negotiation for VPN connections
• IP packet filtering allows precise control of IP traffic on a per-connection
basis

Understanding the Installation Environment

Before you begin, there are some things you should understand and decisions you
need to make to ensure a smooth and successful installation. The information in
this section will help you understand and make those decisions.

Understanding IP Addressing

An IP (Internet Protocol) address is a numeric identifier for a workstation or
device on a Transmission Control Protocol/Internet Protocol (TCP/IP) network. IP
addresses follow the format nnn.nnn.nnn.nnn where nnn is a number between 0
and 255, for example, 192.168.168.230 or 10.1.1.1. IP addresses enable devices to
talk to each other and both servers and workstations on a network must have an IP
address.
There are two types of IP addresses:
• Dynamic – A dynamic IP address may change. Dynamic IP addresses are
assigned to devices by an IP address server as the device needs it. Usually
there is a particular range (or scope) of IP addresses that your network uses.
With dynamic IP addressing, a device can have a different IP address every
time it connects to the network. Other devices need to know the device's IP
address so that they can communicate with it and the IP address server
manages the assignment of IP addresses to the devices.
206901-A
Introduction
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