Dell PowerConnect 5548P System User's Manual page 591

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Configuring Option 82 Using CLI Commands
The following table summarizes the CLI commands for defining fields
displayed in the Option 82 page.
Table 19-6. CLI Option 82 Commands
CLI Command
ip dhcp information option
no ip dhcp information option
The following is an example of the CLI command:
console(config)# ip dhcp information option
Global Settings
To set the DHCP Relay global settings:
1 Click Switching > DHCP Relay > Global Settings in the tree view to
display the Global Settings: Summary page.
Figure 19-6. Global Settings: Summary
The currently-define DHCP servers are displayed.
2 Enable/disable DHCP relay.
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Dell PowerConnect 55xx Systems User Guide
Contax\CxUGSwitching_DHCP.fm
Description
Enables DHCP option-82 data insertion.
Use the no form of this command to
disable DHCP option-82 data insertion.