H3C S3100 Series Operation Manual page 540

Only the S3100-EI series among S3100 series switches support the DHCP-snooping Option 82
support feature.
Enable DHCP snooping and specify trusted ports on the switch before configuring DHCP snooping
to support Option 82.
Table 3-1 DHCP-snooping Option 82 support configuration task list
Enable DHCP-snooping Option 82 support
Follow these steps to configure a handling policy for DHCP packets with
Option 82
Configure the storage format of Option 82
Configure the circuit ID sub-option
Configure the remote ID sub-option
Configure the padding format for Option 82
Enable DHCP-snooping Option 82 support
Follow these steps to enable DHCP-snooping Option 82 support:
Operation
Enter system view
Enable DHCP-snooping Option
82 support
Configure a handling policy for DHCP packets with Option 82
Follow these steps to configure a handling policy for DHCP packets with Option 82:
Operation
Enter system view
Configure a global handling
policy for requests that contain
Option 82
Enter Ethernet port view
Configure a handling policy for
requests that contain Option 82
received on the specified
interface
Task
Command
system-view
dhcp-snooping information
enable
Command
system-view
dhcp-snooping information
strategy { drop | keep |
replace }
interface interface-type
interface-number
dhcp-snooping information
strategy { drop | keep |
replace }
3-8
Remarks
Required
Optional
Optional
Optional
Optional
Optional
Description
—
Required
By default, DHCP snooping
Option 82 support is disabled.
Description
Optional
Optional
The default handling policy is
replace.
—
Optional
The default policy is replace.