dhcp snooping over-vpls enable

Function

The dhcp snooping over-vpls enable command enables DHCP snooping on the device on a Virtual Private LAN Service (VPLS) network.

The undo dhcp snooping over-vpls enable command disables DHCP snooping on the device on a VPLS network.

By default, DHCP snooping is disabled on the device on a VPLS network.

Only the S5720-HI, S5731-H, S5731S-H, S5732-H, S6730-H, S6730S-H, S5730-HI, and S6720-HI support this command.

Format

dhcp snooping over-vpls enable

undo dhcp snooping over-vpls enable

Parameters

None

Views

System view

Default Level

2: Configuration level

Usage Guidelines

Usage Scenario

The DHCP packets on a VPLS network are different from common DHCP packets. Therefore, DHCP snooping cannot take effect for the device on the VPLS network even if the function is enabled globally using the dhcp snooping enable command in the system view. To make DHCP snooping take effect for the device applied to the VPLS network, run the dhcp snooping over-vpls enable command to enable the function.

To enable DHCP snooping for the device on the VPLS network, enable it on the device closed to the user side so that the DHCP packets from the user side to the VPLS network can be controlled.

Prerequisites

DHCP has been enabled globally using the dhcp enable command in the system view.

Precautions

The device management interfaces do not support DHCP snooping on a VPLS network.

After you run the dhcp snooping over-vpls enable command, the maximum number of concurrent users is 50 in the default CPCAR configuration.

When the device is applied to a VPLS network, you only need to run the dhcp snooping over-vpls enable command to enable DHCP snooping on the device and other DHCP snooping command have no changes.

Example

# Enable DHCP snooping on the device on a VPLS network.

<HUAWEI> system-view
[HUAWEI] dhcp enable
[HUAWEI] dhcp snooping enable
[HUAWEI] dhcp snooping over-vpls enable