H3C Technologies H3C S12500 Series Switches User Manual
Page 93
79
Step Command
Remarks
1.
Enter system view.
system-view
N/A
2.
Enter interface view.
interface interface-type interface-number
N/A
3.
Enable DHCP
snooping to support
Option 82.
dhcp-snooping information enable
Disabled by default.
4.
Configure the
handling strategy for
requesting messages
containing Option 82.
dhcp-snooping information strategy
{ append | drop | keep | replace }
Optional.
replace by default.
5.
Configure Option 82
in the
non-user-defined.
•
Configure the padding format for
Option 82:
dhcp-snooping information format
{ normal | private <1-1> | standard |
verbose [ node-identifier { mac |
sysname | user-defined
node-identifier } ] }
•
Configure the code type for the circuit
ID sub-option:
dhcp-snooping information circuit-id
format-type { ascii | hex }
•
Configure the code type for the remote
ID sub-option:
dhcp-snooping information remote-id
format-type { ascii | hex }
•
Enable sub-option 9:
dhcp-snooping information [ vlan
vlan-id ] sub-option sub-option-code
Optional.
By default:
•
The padding format for Option
82 is normal.
•
The code type for the circuit ID
sub-option depends on the
padding format of Option 82.
Each field has its own code
type.
•
The code type for the remote ID
sub-option is hex.
•
Sub-option 9 is not enabled.
The code type configuration for the
circuit ID sub-option and the remote
ID sub-option apply to
non-user-defined Option 82 only.
The private padding format
supports only the hex code type.
For sub-option 9, when append
strategy is adopted, the sysname
and the primary IP address of the
Loopback0 interface are padded.
When some other strategy is
adopted, only the sysname is
padded.