3com 4210 PWR 9-Port 3CR17341-91-ME 用户手册

After you specify a VLAN interface as a DHCP client, the device can use DHCP to 
obtain parameters such as IP address dynamically from the DHCP server, which 
facilitates user configuration and management.

“Obtaining IP Addresses Dynamically” on page 282 for the process of how a 
DHCP client dynamically obtains an IP address through DHCP.

After you specify an interface as a bootstrap protocol (BOOTP) client, the interface 
can use BOOTP to get information (such as IP address) from the BOOTP server, 
which simplifies your configuration.

Before using BOOTP, an administrator needs to configure a BOOTP parameter file 
for each BOOTP client on the BOOTP server. The parameter file contains 
information such as MAC address and IP address of a BOOTP client. When a 
BOOTP client sends a request to the BOOTP server, the BOOTP server will search 
for the BOOTP parameter file and return it to the client.

A BOOTP client dynamically obtains an IP address from a BOOTP server in the 
following way:

1 The BOOTP client broadcasts a BOOTP request, which contains its own MAC 

address.

2 The BOOTP server receives the request and searches for the corresponding IP 

address according to the MAC address of the BOOTP client and sends the 
information in a BOOTP response to the BOOTP client.

3 The BOOTP client obtains the IP address from the received response.

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Table 215   Configure a DHCP/BOOTP client

Enter system view

-

Enter VLAN interface view

interface Vlan-interface 
vlan-id

-