8)
option 54
：
Server Identifier option. DHCP servers include option 54 in the DHCP-OFFER
message in order to allow the client to distinguish between lease offers. DHCP clients use
the option in a DHCP-REQUEST message to indicate which lease offers is being accepted.
9)
option 55
：
Parameter Request List option. This option is used by a DHCP client to request
values for specified configuration parameters.
10)
option 61
：
Client hardware address.
11)
option 66
：
TFTP server name option. This option is used to identify a TFTP server.
12)
option 67
：
Boot-file name option. This option is used to identify a boot-file.
13)
option 150
：
TFTP server address option. This option is used to specify the address of the
TFTP server which assigns the boot-file to the client.
For particulars of DHCP option, please refer to RFC 2132. In the next section, DHCP Server and
DHCP Relay function on this switch will be introduced in detail.
Application Environment of DHCP Server
DHCP Server assigns IP address to the client efficiently in the following environment.
1)
More and more device proliferates in the network, and it is a hard work to configure the IP
parameter for every device manually.
2)
There are not enough network resources to assign to every device exclusively.
3)
Only a little device need static IP address to connect the network.
Details of DHCP Server on T3700G-52TQ
A typical application of
T3700G-52TQ
working at DHCP Server function is shown below. It can
be altered to meet the network requirement.
Figure 10-10
DHCP Server Application
To guarantee the process of assigning IP address fluency and in safety, and to keep the
network run steadily, the DHCP Server function on T3700G-52TQ performs the following tasks.
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