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Forwarding
Database (FDB)
This chapter describes the contents of the forwarding database (FDB),
how the FDB works, and how to configure the FDB.
Overview of the FDB
The Intel
®
NetStructure
™
480T Routing 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 Contents
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.
FDB Entry Types
The following are four types of entries in the FDB:
•
Dynamic entries
— Initially, all entries in the database are dynamic.
Entries in the database are removed (aged-out) if, after a period of time
(aging time), the device has not transmitted. This prevents the database
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Содержание 480T
Страница 16: ...14 P R E F A C E...
Страница 88: ...86 C H A P T E R 4 Configuring Switch Ports...
Страница 112: ...110 C H A P T E R 5 Virtual LANs VLANs...
Страница 152: ...150 C H A P T E R 8 Quality of Service QoS...
Страница 166: ...164 C H A P T E R 9 Enterprise Standby Router Protocol...
Страница 198: ...196 C H A P T E R 1 0 IP Unicast Routing...
Страница 228: ...226 C H A P T E R 1 1 RIP and OSPF...
Страница 254: ...252 C H A P T E R 1 3 IPX Routing...
Страница 274: ...272 C H A P T E R 1 4 Access Policies...
Страница 296: ...294 C H A P T E R 1 6 Using Web Device Manager...
Страница 320: ...318 A P P E N D I X A...
Страница 328: ...326 A P P E N D I X B...
Страница 346: ...344 A P P E N D I X C...
Страница 358: ...356 I N D E X...
Страница 366: ...364 I N D E X...