Alcatel-Lucent 6850-48 参考指南

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页码 3444
DHCP Relay Commands
OmniSwitch CLI Reference Guide
September 2009
page 36-25
ip helper dhcp-snooping option-82 data-insertion
Globally enables or disables DHCP Option-82 data insertion for DHCP packets. When this feature is 
enabled, the relay agent inserts the Option-82 field into DHCP packets before forwarding them to the 
DHCP server.
ip helper dhcp-snooping option-82 data-insertion {enable | disable}
Syntax Definitions
enable
Enables inserting the DHCP Option-82 field into DHCP packets. 
disable
Disables inserting the DHCP Option-82 field into DHCP packets.
Defaults
By default, this feature is disabled. 
Platforms Supported
OmniSwitch 6400, 6850, 6855, 9000, 9000E
Usage Guidelines
• When DHCP Snooping is enabled at the switch level, Option-82 data insertion and MAC address veri-
fication are enabled by default. In addition, the trust mode for all ports is set to the DHCP client only 
mode. 
• Using this command to change the operational status for Option-82 data insertion is only allowed when 
DHCP Snooping is globally enabled for the switch.
• Note that disabling the Option-82 data insertion operation is not allowed when the binding table func-
tionality is enabled.
Examples
-> ip helper dhcp-snooping option-82 data-insertion enable
-> ip helper dhcp-snooping option-82 data-insertion disable
Release History
Release 6.1.2; command was introduced.
Related Commands
Configures the type of information that is inserted in both the Circuit ID 
and Remote ID suboption of the Option-82 field.
.Globally enables or disables DHCP Snooping for the switch.
Enables or disables the DHCP Snooping binding table functionality
Displays the current DHCP configuration for the switch.