Dhcp Snooping Configuration Task List; Configuring Dhcp Snooping Basic Functions - HP 830 Series Configuration Manual

If a DHCP request
has...
no Option 82
The handling strategy and padding format for Option 82 on the DHCP snooping device are the same as
those on the relay agent.

DHCP snooping configuration task list

Task

Configuring DHCP snooping basic functions

Configuring DHCP snooping to support Option 82
Configuring DHCP snooping entries backup
Enabling DHCP starvation attack protection
Enabling DHCP-REQUEST message attack protection
Configuring DHCP snooping basic functions
Follow these guidelines to configure DHCP snooping basic functions:
• You must specify the ports connected to authorized DHCP servers as trusted ports to make sure that
DHCP clients can obtain valid IP addresses. The trusted ports and the ports connected to DHCP
clients must be in the same VLAN.
You can specify Layer 2 Ethernet interfaces and Layer 2 aggregate interfaces as trusted ports. For
•
more information about aggregate interfaces, see Layer 2—LAN Switching Configuration Guide.
If a Layer 2 Ethernet interface is added to an aggregation group, the DHCP snooping configuration
•
of the interface does not take effect. After the interface quits the aggregation group, the
configuration becomes effective.
To configure DHCP snooping basic functions:
Step
1. Enter system view.
2. Enable DHCP snooping.
Handling
Padding format
strategy
N/A normal
N/A private
N/A standard
N/A verbose
N/A user-defined
Command
system-view
dhcp-snooping
55
The DHCP snooping device...
Forwards the message after adding the Option
82 padded in normal format.
Forwards the message after adding Option 82
padded in private format.
Forwards the message after adding Option 82
padded in standard format.
Forwards the message after adding the Option
82 padded in verbose format.
Forwards the message after adding the
user-defined Option 82.
Remarks
Required.
Optional.
Optional.
Optional.
Optional.
Remarks
N/A
Disabled by default.