User`s guide

Chapter 1: Virtual Local Area Networks
1-2 DIGITAL MultiSwitch 700 Port Based VLAN User’s Guide
Figure 1-1 Example of a VLAN
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 two switches 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 MultiSwitch A, cross the high speed
link to MultiSwitch B, and be propagated to all the switch ports on
MultiSwitch B. The switches treat each port as being equivalent to any
other port, and have no understanding of the departmental memberships
of each workstation.
In a port based VLAN environment, each MultiSwitch 700 understands
that certain individual ports 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 MultiSwitch A, be sent to the
ports connected to other local members of the Sales VLAN, cross the high
speed link to MultiSwitch B, and then be sent to any other ports and
workstations on MultiSwitch B that are members of the Sales VLAN.
1
SS
FF
A
6
SSS
FF
B
7
8
9
1
Building One Building Two
MultiSwitch MultiSwitch
trunk
2263-01
S
Member of Sales Network
Member of Finance Network
S
F