ip address dhcp-alloc

Function

The ip address dhcp-alloc command enables the DHCP client function on an interface.

The undo ip address dhcp-alloc command disables the DHCP client function on an interface.

By default, the DHCP client function is disabled on an interface.

Format

ip address dhcp-alloc [ unicast ]

undo ip address dhcp-alloc

Parameters

Parameter	Description	Value
unicast	Indicates that the client requests the server to unicast response packets.	-

Views

Interface view

Default Level

2: Configuration level

Usage Guidelines

Usage Scenario

To enable an interface of the Switch to obtain IP addresses using DHCP, enable the DHCP client function on the interface. A BOOTP client applies for an IP address from the server using DHCP. The DHCP client has two functions:

Sends DHCP Request messages to the server.
Processes DHCP Reply messages from the server.

To obtain an IP address, the DHCP client sends a DHCP Request message to the server. After the server receives the DHCP Request message, it sends a DHCP response message to the DHCP client. The DHCP client obtains the assigned IP address from the response message.

Precautions

Interfaces of the device can have IP addresses statically configured using the ip address command or dynamically obtain IP addresses using the ip address dhcp-alloc command. A static IP address takes precedence over a dynamic IP address. If the interface has dynamically obtained an IP address after the ip address dhcp-alloc command is executed, running the undo ip address command deletes the IP address and the ip address dhcp-alloc command. If the interface does not obtain an IP address after the ip address dhcp-alloc command is executed, running the undo ip address command does not delete the ip address dhcp-alloc command.

Example

# Enable the DHCP client function on VLANIF100 to obtain an IP address.

<HUAWEI> system-view
[HUAWEI] interface vlanif 100
[HUAWEI-Vlanif100] ip address dhcp-alloc

# Enable the DHCP client function on GE0/0/1 to obtain an IP address.

<HUAWEI> system-view
[HUAWEI] interface gigabitethernet 0/0/1
[HUAWEI-GigabitEthernet0/0/1] undo portswitch
[HUAWEI-GigabitEthernet0/0/1] ip address dhcp-alloc