Clavister cOS Core Administration Guide

Chapter 5: DHCP Services
Comments:
5. The assignment could be changed later to IP address 192.168.1.12 with the following
command:
Device:/DHCPServer1> set DHCPServerPoolStaticHost 1
Host=192.168.1.12
MACAddress=00-90-12-13-14-15
InControl
Follow the same steps used for the Web Interface below.
Web Interface
1. Go to: Network > DHCP Services > DHCP Servers > DHCPServer1 > Static Hosts > Add >
Static Host Entry
2. Now enter:
• Host: 19.168.1.1
• MAC: 00-90-12-13-14-15
3. Click OK
5.2.2. Custom Options
Adding a Custom Option to the DHCP server definition allows the administrator to send specific
pieces of information to DHCP clients in the DHCP leases that are sent out.
An example of this is certain switches that require the IP address of a TFTP server from which
they can get certain extra information.
Custom Option Parameters
The following parameters can be set for a custom option:
Code
Type
Data
This is the code that describes the type of information being sent to the client. A large
list of possible codes exists.
This describes the type of data which will be sent. For example, if the type is String then
the data is a character string.
This is the actual information that will be sent in the lease. This can be one value or a
comma separated list.
The meaning of the data is determined by the Code and Type. For example, if the code is
set to 66 (TFTP server name) then the Type could be String and the Data would then be a
site name such as tftp.mycompany.com.
There is a large number of custom options which can be associated with a single DHCP server
and these are described in:
341