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54 9600 Series SIP IP Telephones Administrator Guide SIP Release 2.0
!
Important:
Important: An IP telephone cannot function without an IP Address. The failure of a DHCP
server at boot time leaves all the affected telephones unusable. A user can
manually assign an IP Address to an IP telephone. When the DHCP server finally
returns, the telephone never looks for a DHCP server unless the static IP data is
unassigned manually. In addition, manual entry of IP data is an error-prone
process.
Avaya recommends that:
● A minimum of two DHCP servers be available for reliability.
● A DHCP server be available when the IP telephone reboots.
● A DHCP server be available at remote sites if WAN failures isolate IP telephones from the
central site DHCP server(s).
The file server provides the 9600 Series SIP IP Telephone with a script file and, if appropriate,
new or updated binary software. See Step
4: Telephone and File Server on page 22 under
Telephone Initialization Process
. In addition, you can edit an associated settings file to
customize telephone parameters for your specific environment. For more information, see
Chapter 8:
Administering Telephone Options.
DHCP Server Administration
This document concentrates on the simplest case of the single LAN segment. Information
provided here can be used for more complex LAN configurations.
!
Important:
Important: Before you start, understand your current network configuration. An improper
installation will cause network failures or reduce the reliability and performance of
your network.
Configuring DHCP for 9600 Series SIP IP Telephones
To administer DHCP option 242, make a copy of an existing option 176 for your 46xx IP
Telephones. You can then either:
● leave any parameters the 9600 Series SIP IP Telephones do not support for setting via
DHCP in option 242 to be ignored, or
● delete unused or unsupported 9600 IP Series Telephone parameters to shorten the DHCP
message length.
Only the following parameters can be set in the DHCP site-specific option for 96xx telephones,
although most of them can be set in a 46xxsettings.txt file as well.