Operational, Basic, and Advanced Parameters
41-001343-02 REV05 – 07.2014
A-13
Option 120
Options 159 and 160 - DHCP Option Override
Options 132 - Transfer VLAN ID Assignment Using DHCP
Parameter
–
use dhcp option 120
Configuration Files
aastra.cfg, <model>.cfg, <mac>.cfg
Description
Enables support for DHCP Option 120 on the IP phones. DHCP Option 120 allows SIP clients
to locate a local SIP server (i.e. outbound proxy server) that can be used for all outbound SIP
requests.
Format
Boolean
Default Value
0 (disabled)
Range
0-1
0 (disabled)
1 (enabled)
Example
use dhcp option 120: 1
Parameter
–
dhcp config option override
Configuration Files
aastra.cfg, <model>.cfg, <mac>.cfg
Description
The value specified for this parameter overrides the precedence order for determining a con-
figuration server.
Note:
You must restart the IP Phone for this parameter to take affect.
Format
Integer
Default Value
0 (Any - no override - uses normal precedence order of 43, 160, 159, 66)
Range
-1 (Disabled - ignores all DHCP configuration options (43, 66, 159, 160)
0 (Any)
43
66
159
160
Example
dhcp config option override: 66
Parameter
–
dhcp option 132 vlan id enabled
Configuration Files
aastra.cfg, <model>.cfg, <mac>.cfg
Description
Enables the phone to transport the VLAN ID parameter in the DHCP protocol. When the phone
receives the VLAN ID from the DHCP and the value is different from the one used by the phone
to trigger the DHCP request, the phone reboots and then sends a new DHCP request in the
new VLAN. The phone will remember the VLAN ID obtained by DHCP options so that on a
reboot, the phone will send a DHCP request using the correct VLAN.
Format
Integer
Default value
1 (enabled)
Range
0-1
0 (disabled)
1 (enabled)
Example
dhcp option 132 vlan id enabled: 0