Learning; Independent Vlan Learning; Static And Dynamic Mac Address Tables; Static Mac Filtering - Fujitsu PSWITCH 2048T User Manual

User's Guide
parameter and represents time in seconds. Aging is controlled by microcode. An
address aging time-out parameter is user configurable. The parameter minimum
and maximum values may be bounded by networking device implementation.

Learning

Learning and managing MAC addresses is according to the IEEE 802-1D-1998 and
802-1Q-1998 standards. This software supports Independent VLAN Learning (IVL).
All learning takes place in the underlying device. The forwarding database is
populated from messages received from the platform.

Independent VLAN Learning

Independent VLAN Learning (IVL) allows unicast address-to-port mappings to be
created based on a MAC Address in conjunction with a VLAN ID.
This arrangement associates the MAC Address only with the VLAN on which the
frame was received. Therefore, frames are forwarded based on their unicast
destination address as well as their VLAN membership. This configuration affords
multiple occurrences of an address in the forwarding database. Each address
associates with a unique VLAN. Care must be taken in the administration of
networks, as multiple instances of a MAC address, each on a different VLAN, can
quickly eat up address entries.
Each VLAN is associated with its own forwarding database. Hence the number of
forwarding databases equals the number of VLANs supported.
The MAC address stored is supplemented by a 2-byte VLAN ID. The first 2 bytes of a
forwarding database entry contain the VLAN ID associated, and the next 6 bytes
contain the MAC address. There is a one-to-one relationship between VLAN ID and
FID (forwarding database ID)

3.1.2.4.2. Static and Dynamic MAC Address Tables

You can add static entries to the switch's MAC address table and configure the
aging time for entries in the dynamic MAC address table. Currently static entries
could be added by Port Security and EVB VDP components. You can also search for
entries in the dynamic table based on several different criteria.

3.1.2.4.3. Static MAC Filtering

Static MAC Filtering allows you to add a number of unicast or multicast MAC
addresses directly to the forwarding database. This is typically a small number
relative to the total size of the database. Associated with each static MAC address is
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