Aastra Telecom CT9143i manual Dhcp Option 77 User Class for the Configuration Server

IP Phone Release Notes 2.3

New Features in Release 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.

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.

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.

Parameter–	Configuration Files	aastra.cfg, <mac>.cfg
dhcp userclass	IP Phone UI	Options->Administrator Menu->
		Network Settings->DHCP Settings->
DHCP User Class		DHCP User Class
(in Web UI)	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

18 RN-001029-02, Release 2.3, Rev 00