dhcp through-nak

Function

The dhcp through-nak command enables a device to transparently transmit NAK messages sent by the DHCP server in response to the Discover messages to DHCP clients in DHCP remote address pool scenarios.

The undo dhcp through-nak command disables the function.

By default, a device is disabled from transparently transmitting NAK messages sent by the DHCP server in response to the Discover messages to DHCP clients in DHCP remote address pool scenarios.

This command is supported only on the NetEngine 8000 F1A.

Format

dhcp through-nak

undo dhcp through-nak

Parameters

None

Views

System view

Default Level

2: Configuration level

Task Name and Operations

Task Name	Operations
dhcp	write

Usage Guidelines

Usage Scenario

In scenarios where IP addresses are assigned from a DHCP remote address pool, if a DHCP client sends a Discover message to the DHCP server through a BRAS and the BRAS receives a NAK message from the DHCP server, the BRAS discards the NAK message by default. To prevent this problem, run the dhcp through-nak command to enable the BRAS to transparently transmit NAK messages to the clients.

Precautions

In VS mode, this command is supported only by the admin VS.

Example

# Enable the device to transparently transmit NAK messages sent by the DHCP server in response to the Discover messages to DHCP clients in DHCP remote address pool scenarios.

<HUAWEI> system-view
[~HUAWEI] dhcp through-nak