dhcp option82 rebuild send-to-server
Function
The dhcp option82 rebuild send-to-server command enables a device to encapsulate the Option 82 attribute into a message to be sent to the DHCP server based on the fixed OSP format. In this format, self-defined character strings can be encapsulated into the Option 82 attribute.
The undo dhcp option82 rebuild send-to-server command disables the function.
By default, the device is disabled from encapsulating the Option 82 attribute into a message to be sent to the DHCP server based on the fixed OSP format.
This command is supported only on the NetEngine 8000 F1A.
Format
dhcp option82 rebuild self-define { circuit-id circuit-id-value | out-vlan out-vlan-value | inner-vlan inner-vlan-value | remote-id remote-id-value } * send-to-server
undo dhcp option82 rebuild self-define { circuit-id [ circuit-id-value ] | out-vlan [ out-vlan-value ] | inner-vlan [ inner-vlan-value ] | remote-id [ remote-id-value ] } * send-to-server
undo dhcp option82 rebuild all send-to-server
Parameters
| Parameter | Description | Value |
|---|---|---|
| circuit-id circuit-id-value |
Specifies a user-defined circuit ID, which carries access location information. |
The value is a string of 1 to 64 characters. |
| out-vlan out-vlan-value |
Specifies the outer VLAN ID. |
The value is an integer ranging from 1 to 4094. |
| inner-vlan inner-vlan-value |
Specifies the inner VLAN ID. |
The value is an integer ranging from 1 to 4094. |
| remote-id remote-id-value |
Specifies a user-defined remote ID, which identifies a remote host. |
The value is a string of 1 to 64 characters. |
| self-define |
Specifes a user-defined format. |
- |
| all |
All. |
- |
Usage Guidelines
Usage Scenario
When IP addresses are assigned from a remote address pool to Layer 2 access users, the DHCP server identifies a carrier based on the remote ID carried in the Option 82 attribute of a DHCP message. To allow a device to insert Sub-option 2 (remote ID) into the Option 82 attribute or replace Sub-option 2 carried in the Option 82 attribute of a message to be sent to the DHCP server based on the fixed OSP format, run the dhcp option82 rebuild send-to-server command. Self-defined character strings can be encapsulated into Sub-option 2. In actual applications, you can also run this command to define other sub-attributes of the Option 82 attribute.
Prerequisites
DHCP proxy has been enabled on the BAS interface.
Precautions
In VS mode, this command is supported only by the admin VS.
- If the dhcp option82 rebuild version3 send-to-server command has been run, running the undo dhcp option82 rebuild all send-to-server command can cancel the configuration of the former command.
- The dhcp option82 rebuild send-to-server and dhcp option82 rebuild version3 send-to-server commands are mutually exclusive.
- The dhcp option82 rebuild send-to-server and ipoe-server multi-sessions per-mac enable commands are mutually exclusive.
Example
<HUAWEI> system-view [~HUAWEI] interface GigabitEthernet0/1/1.1 [*HUAWEI] commit [~HUAWEI-interface GigabitEthernet0/1/1.1] bas [~HUAWEI-interface GigabitEthernet0/1/1.1-bas] dhcp option82 rebuild self-define circuit-id huawei out-vlan 200 inner-vlan 100 remote-id huawei send-to-server