Enabling Checking Of Dhcp Request Messages - Huawei Quidway S3700 Series Configuration Manual

Quidway S3700 Series Ethernet Switches
Configuration Guide - Security
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3.5.3 Enabling Checking of DHCP Request Messages

To prevent unauthorized users from sending DHCP Request messages to request IP address
renewal, the S3700 matches the received DHCP Request messages to determine whether to
forward the DHCP Request messages.
Context
Binding entries of DHCP users are created automatically after DHCP snooping is enabled. If a
user uses a static IP address, you need to configure the binding entry of the user manually.
Procedure
Step 1 Run:
system-view
The system view is displayed.
Step 2 Run:
interface interface-type interface-number
The interface view is displayed.
Issue 01 (2011-07-15)
interface interface-type interface-number
The interface view is displayed.
8. (Optional) Run:
dhcp snooping disable
DHCP snooping is disabled on the specified interface in the VLAN.
To disable DHCP snooping on a specified interface in a VLAN, perform steps 6 and
7.
Enabling DHCP snooping in the interface view
1. Run:
system-view
The system view is displayed.
2. Run:
dhcp enable
DHCP is enabled globally.
3. Run:
dhcp snooping enable
DHCP snooping is enabled globally.
4. Run:
interface interface-type interface-number
The interface view is displayed.
5. Run: dhcp snooping enableDHCP snooping is enabled on an interface.
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