dhcp user offline

Function

The dhcp discover user offline command enables a device to log out an online user when a Discover message from a client with the same MAC address as the online user is received.

The undo dhcp discover user offline command disables a device from logging out an online user when a Discover message from a client with the same MAC address as the online user is received.

The dhcp reboot-request user offline command enables a device to log out an online user when a Request message from a client with the same MAC address as the online user is received.

The undo dhcp reboot-request user offline command disables a device from logging out an online user when a Request message from a client with the same MAC address as the online user is received.

By default, a device responds with an ACK message when a Discover or Request message from a client with the same MAC address as an online user is received so that the user goes online from the initial domain.

This command is supported only on the NetEngine 8000 F1A.

Format

dhcp { discover | reboot-request } ^* user offline

undo dhcp { discover | reboot-request } ^* user offline

Parameters

None

Views

AAA domain view

Default Level

3: Management level

Task Name and Operations

Task Name	Operations
aaa	write

Usage Guidelines

Usage Scenario

When an STB is quickly powered off and then restarted, the device cannot detect the user logout, and the user entry is still available. After the STB restarts, the user goes online again. The STB obtains a new account from the NMS in which the online domain may have changed and sends a Discover or Request message to the device. Upon receipt of the Discover or Request message, the device does not check the Option 60 field because a user entry with the same MAC address already exists. The device responds with an ACK message. As a result, the user always goes online from the initial domain and cannot access the network normally.

Configuration Impact

After the dhcp discover user offline or dhcp reboot-request user offline command is run, the device logs out an online user and deletes the user entry when a Discover or Request message from a client with the same MAC address as the online user is received. The user can go online again by sending a Discover or Request message.

Precautions

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

Example

# Enable the device to log out an online user when a Discover message from a client with the same MAC address as the online user is received.

<HUAWEI> system-view
[~HUAWEI] aaa
[~HUAWEI-aaa] domain huawei
[*HUAWEI-aaa-domain-huawei] commit
[~HUAWEI-aaa-domain-huawei] dhcp discover user offline