Dhcp Software Alternatives; Dhcp Generic Setup - Avaya 4600 Series Administrator's Manual

Server Administration
DHCP

DHCP Software Alternatives

Two DHCP software alternatives are common to Windows operating systems:
•
Windows NT
•
Windows 2000
Any other DHCP application may work.
It is the customer's responsibility to install and configure the DHCP server correctly. This document is
limited to describing a generic administration that will work with the 4600 Series IP Telephones.

DHCP Generic Setup

Set up of a DHCP server involves the following phases:
1
Installing the DHCP server software according to vendor instructions.
2
Configuring the DHCP server with the following information:
•
IP addresses available for the 4600 Series IP Telephones.
•
The following DHCP options:
NOTE:
The DHCP standard states that when a DHCP lease expires, the device should
immediately cease using its assigned IP Address. This is not necessarily the desired
behavior for telephones, especially if a user is on a call. If the network has problems and
the only DHCP server is centralized, not accessible to the given telephone, the telephone
is no longer usable until the server can be reached.
42
®
4.0 DHCP Server
®
DHCP Server
—
Option 1 (Subnet mask)
Installation - Per DHCP Server,
—
Option 3 (Gateway [router] IP address[es])
Information Before Installation - Per DHCP Server,
than one address is listed, the total list may contain up to 127 total ASCII
characters, with IP addresses separated by commas with no intervening spaces.
—
Option 6 (DNS server[s] address list). If more than one address is listed, the total
list may contain up to 127 total ASCII characters, with IP addresses separated by
commas with no intervening spaces. At least one address in Option 6 must be a
valid, non-zero, dotted decimal address - otherwise, DNS will fail.
—
Option 15 (DNS Domain Name). This string should contain the domain name to be
used when DNS names in system parameters are resolved into IP addresses. This
domain name is appended to the DNS name before the 4600 IP Telephone attempts
to resolve the DNS address. Option 15 is necessary if you wish to use a DNS name
for the TFTP server; otherwise, you may specify a DOMAIN as part of TFTP
customization, as indicated in
—
Option 51 (DHCP lease time), if desired. Six weeks or greater is recommended.
Expired leases will cause Avaya IP Telephones to reboot. It is highly desirable to
provide enough leases so that an IP Telephone's IP Address does not change if it is
briefly taken off-line.
4600 Series IP Telephone Release 2.1 LAN Administrator's Guide
(Table 2, Required Network Information Before
on page 41, item 3).
(Table 2, Required Network
DNS Addressing on page 69.
on page 41, item 1). If more
July 2004