Product specifications

Chapter 4: System Management Efficient Networks
®
Router family
Technical Reference Guide
Page 4-8 Efficient Networks
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To release the client lease so it becomes available for other assignments, enter:
-> dhcp clear expire <ipaddr>
Setting Option Values
Administrators can set values for global options, for options specific to a subnetwork,
or for options specific to a client lease.
NOTE:
See RFC 2131/2132 for the description of various options.
The DHCP server returns values for options explicitly requested in the client request.
It selects the values to return based on the following algorithm:
1. If the value is defined for the client, then the server returns the requested
value for an option.
2. If the value for the option has not been set for the client, then the server
returns the value option if it has been defined for the subnetwork.
3. If the value option does not exist for the client and does not exist for the
subnetwork, then the server returns the value option if it has been defined
globally.
4. If the value option is not defined anywhere, the server does not return any
value for that option in its reply to the client request.
Important: When the server replies to a client:
• It does not return any option values not requested by the client.
• It does not support the definition of a “class” of clients.
• It does not return any non-default option values unless the client requests the
option value and the server has a value defined for that option.
• It does not return any non-default values on the clients subnet unless the
client requests the value for that option.
Commands for Global Option Values
To set the value for a global option, enter:
-> dhcp set valueoption <code> <value>
The code can be a number between 1 and 61 or a <keyword>.
To see the list of predefined and user-defined options, enter:
-> dhcp list definedoptions
To clear the value for a global option, use: