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C H A P T E R 5
Sales
Virtual LANs (VLANs)
For example, on the switch in Figure 5, ports 1 through 4 are part of
VLAN Marketing; ports 9 through 12 are part of VLAN Sales; and
ports 5 through 8 and 15 and 16 are in VLAN Finance.
Marketing
1
2
3
4
9
10
11
12
Figure 5: Example of a port-based VLAN on the switch
For the members of the different IP VLANs to communicate, the
traffic must be routed by the switch or external router. This means
that each VLAN must be configured as a router interface with a
unique IP address.
Spanning Switches with Port-Based VLANs
To create a port-based VLAN that spans two switches, you must do
two things:
•
Assign the port on each switch to the VLAN.
•
Cable the two switches together using one port on each switch per
VLAN.
Finance
5
6
7
13
14
15
8
16
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