Configuring The Dhcp Client; Enabling The Dhcp Client On An Interface; Configuring A Dhcp Client Id For An Interface - HP 5920 Series Configuration Manual

Configuring the DHCP client

With DHCP client enabled, an interface uses DHCP to obtain configuration parameters from the DHCP
server, for example, an IP address.
The DHCP client configuration is supported only on VLAN interfaces.
When multiple VLAN interfaces with the same MAC address use DHCP for IP address acquisition
through a relay agent, the DHCP server cannot be a Windows Server 2000 or Windows Server 2003.

Enabling the DHCP client on an interface

Follow these guidelines to enable the DHCP client on an interface:
A DHCP client enabled interface uses a default IP address if an IP address request fails several
•
times.
An interface can be configured to acquire an IP address in multiple ways. The new configuration
•
overwrites the old.
Secondary IP addresses cannot be configured on an interface that is enabled with the DHCP client.
•
• If the interface obtains an IP address on the same segment as another interface on the device, the
interface does not use the assigned address. Instead, it requests a new IP address from the DHCP
server.
To enable the DHCP client on an interface:
Step
1. Enter system view.
2. Enter interface view.
3. Configure an interface to use
DHCP for IP address
acquisition.

Configuring a DHCP client ID for an interface

A DHCP client ID is added to the DHCP option 61. A DHCP server can specify IP addresses for specified
clients based on the DHCP client ID.
DHCP client ID includes type and value.
If an ASCII string is used as the client ID value, the type value is 00.
•
If a hex string is used as the client ID value, the type value is the first two characters in the string.
•
If the MAC address of a specific interface is used as the client ID value, the type value is 01.
•
Whichever type you use, make sure the IDs for different DHCP clients are unique.
To configure a DHCP client ID for an interface:
Command
system-view
interface interface-type
interface-number
ip address dhcp-alloc
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Remarks
N/A
N/A
By default, an interface does not
use DHCP for IP address
acquisition.