Aastra Telecom CT9143i manual Dhcp Options 159 and 160 for the Configuration Server

IP Phone Release Notes 2.3

New Features in Release 2.3

DHCP Options 159 and 160 for the Configuration Server

In addition to DHCP options 43 and 66 already supports on the IP Phones for setting the configuration server, Release 2.3 provides new DHCP Options 159 and 160. The IP Phones now use the following order of precedence when deriving the configuration server parameters: 43, 160, 159, 66.

In addition, an administrator can override this order of precedence by setting a configuration parameter called, dhcp config option override. You can set this parameter via the configuration files, IP Phone UI, or the Aastra Web UI. Setting this parameter results in the phone only using the chosen DHCP option and ignoring the other options.

Warning: Administrators should review the updated IP phone DHCP option precedence order and configuration options to avoid potential impact to existing Aastra IP phone deployments.

Configuring DHCP Option Override via the Configuration Files

Use the following parameter to configure DHCP option override on the IP Phones.

Parameter–	Configuration Files	aastra.cfg, <mac>.cfg
dhcp config option	IP Phone UI	Options->Administrator Menu->
override		Network Settings->DHCP Settings->
		Option Override
DHCP Option Override	Aastra Web UI	Advanced Settings->Network->
(in Web UI)		Advanced Network Settings
Description	The value specified for this parameter overrides the precedence order for
	determining a configuration server.
	Note: You must restart the IP Phone for this parameter to take affect.
Format	Integer
Default Value	0 (None - no override - uses normal precedence order of 43, 160, 159, 66)
Range	0
	43
	66
	159
	160
Example	dhcp config option override: 66

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