Mac Table; Overview; What You Can Do; What You Need To Know - ZyXEL Communications GS2200-24 User Manual

C
H A P T E R

37.1 Overview

This chapter introduces the MAC Table screen.
The MAC Table screen (a MAC table is also known as a filtering database) shows
how frames are forwarded or filtered across the Switch's ports. It shows what
device MAC address, belonging to what VLAN group (if any) is forwarded to which
port(s) and whether the MAC address is dynamic (learned by the Switch) or static
(manually entered in the Static MAC Forwarding screen).

37.2 What You Can Do

Use the MAC Table screen
dynamic or static
address is

37.3 What You Need to Know

The Switch uses the MAC table to determine how to forward frames. See the
following figure.
The Switch examines a received frame and learns the port on which this source
1
MAC address came.
The Switch checks to see if the frame's destination MAC address matches a source
2
MAC address already learned in the MAC table.
• If the Switch has already learned the port for this MAC address, then it forwards
the frame to that port.
• If the Switch has not already learned the port for this MAC address, then the
frame is flooded to all ports. Too much port flooding leads to network
congestion.
GS2200-24 User's Guide
(Section 37.4 on page
.
37

MAC Table

316) to check
whether the MAC
315