Cisco Cisco Clean Access 3.5

The Global Options tab (

) allows advanced users to modify the DHCP configuration directly.

DHCP options can be specified as follows: 

Root global options appear at the root level or top of the DHCP configuration file and apply to all 
DHCP subnet declarations. Root global options are inherited by everything in the file. 

Scoped global options are added to each subnet definition, but you can enable whether or not a 
subnet inherits the option. When DHCP options are enabled, an “Inherit Scoped Global Option” 
enable appears on the forms used to add or edit manually-created or automatically-generated 
subnets. Note that the “Inherit Scoped Global Option” checkbox appears only while customized 
DHCP options are enabled and only for subnets created after the options are enabled. 

Local options apply only to the subnet for which they are entered. Local DHCP options can be added 
to an individual subnet using the Subnet List > Edit form described in 

The DHCP configuration file should not be modified under most circumstances.

See 

 for additional details. 

Go to the Network > DHCP > Global Options tab and click the Enable button. 

Click the New Option link at the top right-hand corner of the Root Global Option List to open the 
root global options form (

). This form allows you to enter text directly into the DHCP 

configuration file at the root level.