Huawei Quidway S2700 Series Configuration Manual page 99

Quidway S2700 Series Ethernet Switches
Configuration Guide - Security
Procedure
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Issue 01 (2011-07-15)
In the interface view:
1. Run:
system-view
The system view is displayed.
2. Run:
interface interface-type interface-number
The interface view is displayed.
The interface is the user-side interface.
3. Run:
dhcp option82 insert enable
The Option 82 is appended to DHCP messages.
Or, run:
dhcp option82 rebuild enable
The Option 82 is forcibly appended to DHCP messages.
– After the dhcp option82 insert enable command is used, the Option 82 is
appended to DHCP messages if original DHCP messages do not carry the Option
82 field; If the DHCP message contains an Option 82 field previously, the
S2700 checks whether the Option 82 field contains the Remote-id. If the Option
82 field contains the Remote-id, the S2700 retains the original Option 82 field. If
not, the S2700 inserts the Remote-id to the Option 82 field. By default, the Remote-
id is the MAC address of the S2700.
– After the dhcp option82 rebuild enable command is used, the Option 82 field is
appended to DHCP messages if original DHCP messages do not carry the Option
82 field; the original Option 82 field is removed and a new one is appended if the
original DHCP messages carry the Option 82 field.
In the VLAN view:
1. Run:
system-view
The system view is displayed.
2. Run:
vlan vlan-id
The VLAN view is displayed.
3. Run:
dhcp option82 insert enable interface { interface-name | interface-type
interface-number } [ to interface-number ]
The Option 82 is appended to DHCP messages.
Or, run:
dhcp option82 rebuild enable interface { interface-name | interface-type
interface-number } [ to interface-number ]
The Option 82 is forcibly appended to DHCP messages.
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3 DHCP Snooping Configuration
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