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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.
IP FDB Performance
The IP FDB handling is enhanced so that only relevant IP FDB entries are
flushed when entries are modified in the system routing table.
As a result, you will see a significant performance improvement in
situations where there are frequent route changes. Performance is
improved because route changes do not affect traffic that is not relevant
to the route change.
The 480T routing switch supports 256K entries in the forwarding
database. These can be Layer 2 or Layer 3 addresses.
Up to 256 static MAC entries are supported.
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