H3C Technologies H3C S3100 Series Switches - Manual (Page 540)

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