3Com 9000 SX User Manual page 79

For example, in Figure 5-1, the VLANs are configured as followings:
Ports 1, 2, and 5 are part of VLAN Marketing
Ports 3, 4, and 6 are part of VLAN Sales
Ports 7 and 8 are part of VLAN Finance
Marketing
Sales
Figure 5-1 Example of a port-based VLAN
Even though they are physically connected to the same Switch, in order
for the members of the different VLANs to communicate, the traffic
must go through the IP routing functionality provided in the
Switch 9000. This means that each VLAN must be configured as a
router interface with a unique IP address.
Overview of Virtual LANs
Finance
5-3