Mac Address Learning - Buffalo BSL-WS-G2108M User Manual

Chapter 1 Product Overview

MAC Address Learning

The switch uses IVL to learn MAC addresses.
IVL is a method that retains a MAC address table for each VLAN. It differs from SVL, which retains a
shared MAC address table for the entire device.
Be sure you understand how IVL works before you create a VLAN with the switch.
Differences between Operation of IVL and SVL
Port 1
VLAN 1,3
Switch 1
Switch 2
VLAN 1
Port 1
IVL
When PC 1 and PC 3 communicate,
PC 3 is learned by both VLAN 1 and
VLAN 2 so PC 2 and PC 3 can
communicate. However, frames
sent from PC 3 to PC 1 are also
delivered to PC 2.
PC3
Port 2 Port 3
VLAN 2,3 VLAN 1,2,3
VLAN 2 VLAN 1
Port 2 Port 3
PC 1
SVL
When PC 1 and PC 3 communicate,
PC 3 is learned by Port 1 on Switch
2 so PC 2 and PC 3 cannot
communicate.
Port 4
VLAN 3
VLAN 2
Port 4
PC 2
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