HPE 3100 Configuration Manual page 83

DHCP snooping fills the VLAN ID field of sub-option 1 with outer VLAN tag.inter VLAN tag. For
example, if the outer VLAN tag is 10 (a in hexadecimal) and the inner VLAN tag is 20 (14 in
hexadecimal), the VLAN ID is 000a.0014.
To configure DHCP snooping to support Option 82:
Step
1. Enter system
view.
2. Enter interface
view.
3. Enable DHCP
snooping to
support Option 82.
4. Configure the
handling strategy
for requests
containing Option
82.
5. Configure Option
82 in the
non-user-defined
padding format.
Command
system-view
interface interface-type
interface-number
dhcp-snooping information enable
dhcp-snooping information strategy
{ append | drop | keep | replace }
•
Configure the padding format for
Option 82:
dhcp-snooping information
format { normal | private private |
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
73
Remarks
N/A
N/A
Disabled by default.
Optional.
replace by default.
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
Hex configuration applies to private
padding format only.
The code type configuration for the
circuit ID sub-option and remote ID
sub-option apply to non-user-defined
Option 82 only.
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.