mac-forced-forwarding dumb-terminal-compatible

Function

The mac-forced-forwarding dumb-terminal-compatible command configures a device to forward the ARP packets from the gateway to dumb terminals.

The undo mac-forced-forwarding dumb-terminal-compatible command disables a device from forwarding the ARP packets from the gateway to dumb terminals.

By default, a device does not forward the ARP packets from gateway to dumb terminals.

Format

mac-forced-forwarding dumb-terminal-compatible

undo mac-forced-forwarding dumb-terminal-compatible

Parameters

None

Views

VLAN view

Default Level

2: Configuration level

Usage Guidelines

Usage Scenario

When the MFF device connects to dumb terminals (which do not actively send ARP request packets or send ARP request packets at a long interval), the MFF device must transparently transmit the ARP packets from gateway to dumb terminals after the MFF entries are aged out; otherwise, the user ARP entries on gateway are aged out and user services are interrupted. Therefore, when the MFF device connects to dumb terminals, the MFF device needs to be configured to transparently transmit the ARP packets from gateway to dumb terminals.

Prerequisites

Global MFF has been enabled using the mac-forced-forwarding enable command.

Precautions

After the MFF device is configured to transparently transmit ARP packets to dumb terminals, run the mac-forced-forwarding static-gateway command to configure an IP address for the static gateway; otherwise, this function does not take effect.

After this function is enabled, the MFF device searches the static binding table when receiving ARP request packets from the gateway (configured using the user-bind static command):

If the outbound interface is found in the static binding table, the device forwards the ARP request packets through this interface.
If the outbound interface is not found in the static binding table, the device broadcasts the ARP request packets in the VLAN. In this situation, all users in the VLAN can receive the ARP packets.

Example

# Configure a device to transparently transmit ARP packets from gateway to dumb terminals in VLAN 100.

<HUAWEI> system-view
[HUAWEI] mac-forced-forwarding enable
[HUAWEI] vlan 100
[HUAWEI-vlan100] mac-forced-forwarding enable
[HUAWEI-vlan100] mac-forced-forwarding dumb-terminal-compatible