Avaya 9608 - Setting up the DHCP Server

Administering the DHCP Server
Issue 1 May 2011 67
Setting up the DHCP server
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 9600 Series IP Deskphones.
● The following DHCP options:
- Option 1 - Subnet mask.
As described in Required network information before installation - per DHCP server
.
- Option 3 - Gateway (router) IP Address(es).
As described in Required network information before installation - per DHCP server
,
item . 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.
- Option 6 - DNS server(s) address list.
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. 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 has one of the following values based on the OID (first
three octets) of the deskphone’s MAC address: “A” if the OID is 00-04-0D, “B” if the
OID is 00-1B-4F, (SIP software Release 2.0+), “E” if the OID is 00-09-6E, “L” if the
OID is 00-60-1D, “T” if the OID is 00-07-3B, (SIP software Release R2.0+) 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 deskphone’s MAC address.
- 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 9600 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
About DNS addressing
on page 117.
- Option 42 - SNTP Server.
This option specifies a list of IP Addresses indicating NTP servers available to the
deskphone. List servers in the order of preference.The minimum length is 4, and the
length must be a multiple of 4.
- 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