HP 6125G HP 6125G & 6125G/XG Blade Switches Layer 3 - IP Services Conf - Page 49

Configuring the DHCP relay agent to support Option 82, Configuration prerequisites

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Step 1. Enter system view. 2. Configure the DHCP relay agent to release an IP address. Command system-view dhcp relay release ip client-ip Remarks N/A The IP address must be in a dynamic client entry. Configuring the DHCP relay agent to support Option 82 Configuration prerequisites Before you perform this configuration, complete the following tasks: • Enable DHCP. • Enable the DHCP relay agent on the specified interface. • Correlate a DHCP server group with relay agent interfaces. Configuration guidelines • To support Option 82, perform related configuration on both the DHCP server and relay agent. • If the handling strategy of the DHCP relay agent is configured as replace, you must configure a padding format for Option 82. If the handling strategy is keep or drop, you need not configure any padding format. • If sub-option 1 (node identifier) of Option 82 is padded with the device name (sysname) of a node, the device name must contain no spaces. Otherwise, the DHCP relay agent will drop the message. Configuration procedure To configure the DHCP relay agent to support Option 82: Step Command 1. Enter system view. system-view 2. Enter interface view. interface interface-type interface-number 3. Enable the relay agent to support Option 82. dhcp relay information enable 4. Configure the handling strategy for requesting messages containing Option dhcp relay information strategy { drop | keep | replace } 82. Remarks N/A N/A Disabled by default. Optional. replace by default. 41

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41
Step
Command
Remarks
1.
Enter system view.
system-view
N/A
2.
Configure the DHCP relay agent to
release an IP address.
dhcp relay release ip
client-ip
The IP address must be in a
dynamic client entry.
Configuring the DHCP relay agent to support
Option 82
Configuration prerequisites
Before you perform this configuration, complete the following tasks:
•
Enable DHCP.
•
Enable the DHCP relay agent on the specified interface.
•
Correlate a DHCP server group with relay agent interfaces.
Configuration guidelines
•
To support Option 82, perform related configuration on both the DHCP server and relay agent.
•
If the handling strategy of the DHCP relay agent is configured as
replace
, you must configure a
padding format for Option 82. If the handling strategy is
keep
or
drop
, you need not configure any
padding format.
•
If sub-option 1 (node identifier) of Option 82 is padded with the device name (sysname) of a node,
the device name must contain no spaces. Otherwise, the DHCP relay agent will drop the message.
Configuration procedure
To configure the DHCP relay agent to support Option 82:
Step
Command
Remarks
1.
Enter system view.
system-view
N/A
2.
Enter interface view.
interface
interface-type
interface-number
N/A
3.
Enable the relay
agent to support
Option 82.
dhcp relay information enable
Disabled by default.
4.
Configure the
handling strategy for
requesting messages
containing Option
82.
dhcp relay information strategy
{
drop
|
keep
|
replace
}
Optional.
replace
by default.