VLAN MAC-layer Filtering Database and MAC Security

Table 1. FDB Protected by Port product support

Feature

Product

Release introduced

FDB protected by port (MAC security limit-learning)

5320 Series

Fabric Engine 8.6

5420 Series

VOSS 8.4

5520 Series

VOSS 8.3

5720 Series

Fabric Engine 8.7

To perform MAC-layer bridging, the device must know the destination MAC-layer address of each device on each attached network to forward packets to the appropriate destination. The system stores MAC-layer addresses in the bridge forwarding database (FDB) table, and can forward packet traffic based on the destination MAC-layer address information.

MAC security

Use MAC security to control traffic from specific number of MAC addresses. You can also limit the number of allowed MAC addresses. You can enable this feature at the port level.

Port-level security applies to traffic for all VLANs received on that port.

Port-level MAC security provides limit—learning option:

Restrictions

The following list identifies restrictions to MAC security limit-learning: