Enterasys 6000 用户指南

In this example, the Sales and Finance workstations have been placed on two separate VLANs. In 
a plain Ethernet environment, the entire network is a broadcast domain, and the SmartSwitches 
follow the IEEE 802.1D bridging specification to send data between stations. A broadcast or 
multicast transmission from a Sales workstation in Building One would propagate to all the switch 
ports on SmartSwitch A, cross the high speed link to SmartSwitch B, and then propagated out all 
switch ports on SmartSwitch B. The SmartSwitches treat each port as being equivalent to any other 
port, and have no understanding of the departmental memberships of each workstation.

In a VLAN environment, each SmartSwitch understands that certain individual ports or frames are 
members of separate workgroups. In this environment, a broadcast or multicast data transmission 
from one of the Sales stations in Building One would reach SmartSwitch A, be sent to the ports 
connected to other local members of the Sales VLAN, cross the high speed link to SmartSwitch B, 
and then be sent to any other ports and workstations on SmartSwitch B that are members of the 
Sales VLAN.

1

6

7

8

9

10

Building One

Building Two

SmartSwitch

SmartSwitch

trunk

22631-01

Member of Sales Network

Member of Finance Network