3Com 3C17300A Implementation Guide - Page 49

Using the Switch Database, What is the Switch Database?, How Switch Database Entries Get Added

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5 USING THE SWITCH DATABASE What is the Switch Database? The Switch Database is used by the Switch to determine where a packet should be forwarded to, and which port should transmit the packet if it is to be forwarded. The database contains a list of entries - each entry contains three items: ■ MAC (Ethernet) address information of the endstation that sends packets to the Switch. ■ Port identifier, that is the port attached to the endstation that is sending the packet. ■ VLAN ID of the VLAN to which the endstation belongs. For details of the number of addresses supported by your Switch database, please refer to Chapter 1 of the Getting Started Guide that accompanies your Switch. For detailed descriptions of the web interface operations and the command line interface (CLI) commands that you require to manage the Switch please refer to the Management Interface Reference Guide supplied in HTML format on the CD-ROM that accompanies your Switch. How Switch Database Entries Get Added Entries are added to the Switch Database in one of two ways: ■ The Switch can learn entries. The Switch updates its database with the source MAC address of the endstation that sent the packet, the VLAN ID, and the port identifier on which the packet is received. ■ You can enter and update entries using the bridge addressDatabase CLI command, the Bridge > Address Database Web Interface operation, or an SNMP Network Manager, for example 3Com Network Supervisor.

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5
U
SING
THE
S
WITCH
D
ATABASE
What is the Switch
Database?
The Switch Database is used by the Switch to determine where a packet
should be forwarded to, and which port should transmit the packet if it is
to be forwarded.
The database contains a list of entries — each entry contains three items:
■
MAC (Ethernet) address information of the endstation that sends
packets to the Switch.
■
Port identifier, that is the port attached to the endstation that is
sending the packet.
■
VLAN ID of the VLAN to which the endstation belongs.
For details of the number of addresses supported by your Switch
database, please refer to Chapter 1 of the Getting Started Guide that
accompanies your Switch.
For detailed descriptions of the web interface operations and the
command line interface (CLI) commands that you require to manage the
Switch please refer to the Management Interface Reference Guide
supplied in HTML format on the CD-ROM that accompanies your Switch.
How Switch
Database Entries
Get Added
Entries are added to the Switch Database in one of two ways:
■
The Switch can learn entries. The Switch updates its database with the
source MAC address of the endstation that sent the packet, the VLAN
ID, and the port identifier on which the packet is received.
■
You can enter and update entries using the
bridge addressDatabase
CLI command, the
Bridge > Address Database
Web Interface
operation, or an SNMP Network Manager, for example 3Com
Network Supervisor.