DHCP Server Administration
Issue 5 April 2010 45
Any other DHCP application might work. It is the responsibility of the customer to install and
configure the DHCP server correctly.
DHCP server setup involves:
1. Installing the DHCP server software according to vendor instructions.
2. Configuring the DHCP server with:
●IP addresses available for the 1600 Series IP Telephones.
●The following DHCP options:
-Option 1 - Subnet mask.
As described in Table3, item 3.
-Option 3 - Gateway (router) IP address(es).
As described in Table3, item 1. If using more than one address, the total list can
contain up to 255 total ASCII characters. You must separate IP addresses with
commas with no intervening spaces.
-Option 6 - DNS server(s) address list.
If using more than one address, the total list can contain up to 127 total ASCII
characters. You must separate IP addresses with commas with no intervening spaces.
At least one address in Option 6 must be a valid, non zero, dotted decimal address.
-Option 12 - Host Name.
Value is AVohhhhhh, where: o is “A” if the OID (first three octets) of the MAC address
for the telephone is 00-04-0D. “E” if the OID is 00-09-6E, “L” if the OID is 00-60-1D,
and “X” if the OID is anything else and where hhhhhh are ASCII characters for the
hexadecimal representation of the last three octets of the MAC address for the
telephone.
-Option 15 - DNS Domain Name.
This string contains 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 1600 IP Telephone attempts to resolve the DNS address.
Option 15 is necessary if you want to use a DNS name for the HTTP server.
Otherwise, you can specify a DOMAIN as part of customizing HTTP as indicated in
DNS Addressing on page 76.
-Option 51 - DHCP lease time.
If this option is not received, the DHCPOFFER is not be accepted. Avaya
recommends a lease time of six weeks or greater. If this option has a value of
FFFFFFFF hex, the IP address lease is assumed to be infinite as per RFC 2131,
Section 3.3, so that renewal and rebinding procedures are not necessary even if
Options 58 and 59 are received. Expired leases cause Avaya IP Telephones to reboot.
Avaya recommends providing enough leases so an IP address for an IP telephone
does not change if it is briefly taken offline.