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New Features in Release 2.3
18 RN-001029-02, Release 2.3, Rev 00
IP Phone Release Notes 2.3
DHCP Option 77 User Class for the Configuration Server
Release 2.3 includes a new DHCP Option 77 User Class, that is sent in DHCP request packets
from the phone to the configuration server. This Option 77 defines specific User Class identifiers
to convey information about a phone’s software configuration or about its user's preferences. For
example, you can use the User Class option to configure all phones in the Accounting
Department with different user preferences than the phones in the Marketing Department. A
DHCP server uses the User Class option to choose the address pool for which it allocates an
address from, and/or to select any other configuration option.
An Administrator can configure the DHCP Option 77 User Class via the configuration files, the
IP Phone UI, and the Aastra Web UI.
Configuring DHCP Option 77 User Class via the Configuration Files
Use the following parameter to configure the phone to use DHCP Option 77.
Notes:
1. If the User Class is not specified (left blank) in the DHCP request
packet, the phone does not send the User Class DHCP Option 77.
2. Multiple User Classes inside a DHCP Option 77 are not supported.
3. DHCP Option 77 may affect the precedence of DHCP Options,
dependent on the DHCP Server.
Parameter–
dhcp userclass
DHCP User Class
(in Web UI)
Configuration Files aastra.cfg, <mac>.cfg
IP Phone UI Options->Administrator Menu->
Network Settings->DHCP Settings->
DHCP User Class
Aastra Web UI Advanced Settings->Network->
Advanced Network Settings
Description Specifies the User Class DHCP Option 77 that the phone sends to the
configuration server with the DHCP Request packet.
Note: If you specify a value for this parameter, you must restart your phone
for the change to take affect. Any change in its value during start-up results
in an automatic reboot.
Format String
Default Value ““
Range Up to 64 alpha-numeric characters
Example dhcp userclass: admin