TP-Link T2600G-28MPS T2600G-28MPSUN V1 User Guide - Page 209

Application Environment of DHCP Server, Details of DHCP Server

Page 209 highlights

6) option 51:Lease Time option. In DHCP-OFFER and DHCP-ACK message, the DHCP server uses this option to specify the lease time in which the clients can use the IP address legally. 7) option 53:Message Type option. This option is used to convey the type of the DHCP message. Legal values for this option show in Table 10-2: Value 1 2 3 4 5 6 7 8 Message Type DHCP-DISCOVER DHCP-OFFER DHCP-REQUEST DHCP-DECLINE DHCP-ACK DHCP-NAK DHCP-RELEASE DHCP-INFORM Table 10-2 Option 53 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 A typical application of the switch working at DHCP Server function is shown below. It can be altered to meet the network requirement. 198

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6)
option 51
Lease Time option. In DHCP-OFFER and DHCP-ACK message, the DHCP server
uses this option to specify the lease time in which the clients can use the IP address legally.
7)
option 53
Message Type option. This option is used to convey the type of the DHCP
message. Legal values for this option show in Table 10-2:
Value
Message Type
1
DHCP-DISCOVER
2
DHCP-OFFER
3
DHCP-REQUEST
4
DHCP-DECLINE
5
DHCP-ACK
6
DHCP-NAK
7
DHCP-RELEASE
8
DHCP-INFORM
Table 10-2 Option 53
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
A typical application of the switch working at DHCP Server function is shown below. It can be
altered to meet the network requirement.
198