User guide
E
XTREME
W
ARE
S
OFTWARE
U
SER
G
UIDE
7-1
7
Forwarding Database (FDB)
This chapter describes the following topics:
• Overview of the FDB on page 7-1
• Configuring FDB Entries on page 7-3
• Displaying FDB Entries on page 7-5
O
VERVIEW
OF
THE
FDB
The switch maintains a database of all media access control (MAC) addresses received
on all of its ports. It uses the information in this database to decide whether a frame
should be forwarded or filtered.
FDB C
ONTENTS
Each FDB entry consists of the MAC address of the device, an identifier for the port on
which it was received, and an identifier for the VLAN to which the device belongs.
Frames destined for devices that are not in the FDB are flooded to all members of the
VLAN.