3Com 10014298 manual Configuring a Dhcp Server IP Address in a Dhcp Server Group, Ipaddress2

Figure 20 DHCP Relay Schematic Diagram
	t
	ne
	er
clientsDHCP	Eth	Ethernet
	Intranet

Switch

DHCP Relay 73

DHCP client

DHCP server

When the DHCP Client performs initialization, it broadcasts the request packet on the local network segment. If there is a DHCP server on the local network segment (e.g. the Ethernet on the right side of the figure), then the DHCP can be configured directly without the relay. If there is no DHCP server on the local network segment, DHCP relay will process the received broadcast packets and forward them to remote DHCP servers. The server configures the clients based on the information provided in the DHCP request packet and in the server setup. Then the server transmits the configuration information to the clients through the DHCP relay, thereby, completing the dynamic configuration of the client.

Configuring DHCP is described in the following sections:

■Configuring DHCP Relay

■Troubleshooting a DHCP Relay Configuration

Configuring DHCP Relay DHCP relay configuration includes tasks described in the following sections:

■Configuring a DHCP Server IP Address in a DHCP Server Group

■Configuring the DHCP Server Group for the VLAN Interface

■Configuring the Address Table Entry

■Enabling/Disabling DHCP Security Features

■Displaying and Debugging DHCP Relay

The server IP address is associated , through its DHCP server group, with a specific VLAN interface. This implementation differs from others in which the server IP is a global parameter.

Configuring a DHCP Server IP Address in a DHCP Server Group

Perform the following configuration in System view.

Table 69 Configure/Delete the IP Address of the DHCP Server

Operation	Command
Configure the IP address for a DHCP Server	dhcp-servergroupNo ip ipaddress1
	[ ipaddress2 ]