Enabling DHCP Snooping

To configure Dynamic Host Configuration Protocol (DHCP) snooping functions, enable DHCP snooping first.

Context

Enable DHCP snooping in the following sequence:

Enable DHCP globally.
Enable DHCP snooping globally.
Enable DHCP snooping in an interface, BD, or VLAN view.

Procedure

Enable DHCP snooping for a VLAN.
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 vlan vlan-id
  The VLAN view is displayed.
5. Run dhcp snooping enable
  DHCP snooping is enabled for the VLAN.
6. Run quit
  The system view is displayed.
7. Run commit
  The configuration is committed.
Enable DHCP snooping in the BD 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 bridge-domain bd-id
  The BD view is displayed.
5. Run dhcp snooping enable
  DHCP snooping is enabled in a BD.
6. Run commit
  The configuration is committed.
Enable DHCP snooping for an interface.
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 enable
  DHCP snooping is enabled for the interface.
6. Run commit
  The configuration is committed.

Parent Topic: Preventing DoS Attacks by Changing the CHADDRField

Copyright © Huawei Technologies Co., Ltd.

Copyright © Huawei Technologies Co., Ltd.