User Guide for the Avaya P580 and P882 Multiservice Switches, v6.1 11-1
11 Configuring DNS Client
Overview
This chapter provides an overview of the Domain Naming System (DNS)
Client support and procedures for configuring DNS client support on the
Avaya Multiservice switch:
■DNS Client Support
■DNS Client on the Avaya Multiservice Switch
■Configuring the DNS Client

DNS Client Support

Overview
DNS is a distributed database of name servers which supply name-to-
address translations for DNS clients. The DNS servers collectively direct
DNS Clients to the DNS Server responsible for a Name to Address
mapping; and that Server provides the specific mapping being requested.
There are three types of DNS servers:
■The root name server — Located at the top of the DNS database
tree. It contains pointers to the mas t e r name servers for each of the
top-level domains. The root name servers handle the domains such
as .COM, .EDU, .GOV, etc.
■The master name server — Located in the middle of the DNS
database tree. It contains pointers to the individual n ame servers for
each of the subdomains within its top-level domain.
■The individual name server — Located at the bottom of the DNS
database tree. It contains detailed address information for the local
hosts in the subdomain.