User's Manual

The unique DHCP configuration is required to allow the DHCP server to respond with a unique
Option 66 parameter to the IP Deskphone with SIP Software.
Note:
The DHCP standard defines Option 66 as the bootp server address in a string. The meaning
of the bootp server address is extended in Avaya IP Deskphone with SIP Software to include
the provisioning server address. The string in the DHCP offer for Option 66 can be the
numeric IP address or name of the Provisioning server or the URI (if FTP, HTTP, or HTTPS
protocol is used) of the provisioning server in the form of <protocol>://<provisioning
server URL>. For example, http://mydomain.com/SIP_phone.
If provisioning server authentication is required, the user credential must be embedded in
the URI in the form of <protocol>://<userid>;<password>@<provisioning
server URL>[:port][/path]. For example, ftp://www.mydomain.com/ABC or
ftp://myuserid:[e-mail]:21/ABC
Requested Device Settings parameters
SIP IP Deskphone-aware DHCP server can automatically configure SIP IP Deskphones by
requesting a list of configuration parameters. The IP Deskphone uses DHCP to request and
receive the information.
The following table lists the Device Settings parameters requested by the IP Deskphone in the
Parameter Request List option (Option Code 55) in the DHCPDISCOVER and
DHCPREQUEST messages. The DHCPOFFER and the DHCPACK reply messages from the
DHCP server must contain the options in the following table.
Table 6: DHCP options
Parameter requested by the
IP Deskphone
Description DHCP server option
Subnet mask This is the subnet mask of the
IP Deskphone.
1
Router and gateways IP address of the default
gateway of the IP
Deskphone.
3
DNS server DNS Server address; only
the first one from the list is
used.
6
Broadcast address This is the Broadcast
address of the subnet. The IP
Deskphone automatically
calculates the Broadcast
address if it is not provided.
28
Configure the DHCP Server
110 SIP Software for Avaya 1100 Series IP Deskphones-Administration November 2012
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