11 configuring dns client, Overview, Dns client support – Avaya 580 User Manual
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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 on the Avaya Multiservice Switch
■
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 master 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 name 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.