MAC Configuration

Overview of MAC Addresses

This section briefly describes the basic concept of a MAC address table, modes for generating MAC address entries, MAC address entry classification, and MAC address-based packet forwarding.

Configuration Precautions for MAC

Configuring Static MAC Address Entries

After a static MAC address entry is configured, packets with the destination MAC address matching the entry are forwarded from the specified outbound interface. This configuration protects a device from attack packets with forged MAC addresses.

Configuring Static Blackhole MAC Address Entries

To protect a network against attacks using MAC addresses, configure static blackhole MAC address entries to discard packets with the specified destination MAC addresses.

Configuring MAC Accounting for a Broadcast Domain

MAC accounting can be enabled for a specified broadcast domain, allowing the device to collect Layer 2 traffic statistics of the target domain based on MAC addresses.

Configuring Parameters for Dynamic MAC Address Entries

Parameters that can be configured for dynamic MAC address entries include the aging time and MAC address learning limit rule.

Disabling MAC Address Learning

On a network where networking is fixed, after MAC address learning is disabled on an interface of a device, other servers or terminals cannot communicate with this device through this interface, improving the device security.

Configuring Sticky MAC

Configuring a MAC Address for a Sub-interface

Configure a MAC address for a sub-interface and bind the MAC address to a PVC to allow services to travel through a specific PVC.

Configuring the Global MAC Hopping-based Loop Detection Alarm Function

To allow network administrators to promptly detect that a loop has occurred in a forwarding domain, configure the global MAC hopping-based loop detection alarm function. If a loop occurs, an alarm will be generated.

Maintaining MAC Address Tables

You can monitor MAC address table usages on IPU and interface boards and then set a proper usage threshold for MAC address tables to improve network security and stability.

Configuration Examples for MAC Address Tables

This section describes the networking requirements, configuration roadmap, and data preparation for MAC address table configuration in a VLAN and provides configuration files.