{ unknown-multicast | unknown-unicast } discard (Bridge domain view)

Function

The unknown-multicast discard command disables interfaces in a BD from forwarding unknown multicast packets.

The undo unknown-multicast discard command restores the default configuration.

The unknown-unicast discard command disables interfaces in a BD from forwarding unknown unicast packets.

The undo unknown-unicast discard command restores the default configuration.

By default, interfaces in a BD forward unknown multicast, and unknown unicast packets.

Format

unknown-multicast discard

unknown-unicast discard

undo unknown-multicast discard

undo unknown-unicast discard

Parameters

None

Views

Bridge domain view

Default Level

2: Configuration level

Task Name and Operations

Task Name	Operations
mac	write

Usage Guidelines

Usage Scenario

When interfaces in a BD receive unknown unicast packets, or unknown unicast packets, the interfaces broadcast these packets in the BD. If the interfaces broadcast a large number of attack packets, the forwarding and security of other packets are threatened.

To disable interfaces in a BD from forwarding unknown unicast packets, or unknown unicast packets, run this command.

Example

# Configure interfaces in a BD to discard unknown unicast packets.

<HUAWEI> system-view
[~HUAWEI] bridge-domain 3
[*HUAWEI-bd3] unknown-unicast discard