Cabletron Systems 802.1Q manual Example 2, VLANs Across Multiple Switches

Example 2, VLANs Across Multiple Switches

Redco

Blue Industries

	Bridge 1		2	Bridge 2
User A			4 3
	Red VLAN	1		Blue VLAN
			4

Floor 4

Floor 3
Blue Industries				Redco
File Server			2	Bridge 4	File Server
	Bridge 3
			2 3
	Blue VLAN	1		Red VLAN
Floor 2

Floor 1

User

802.1D Legacy Bridge

802.1Q VLAN Aware Switch

File Server

22632_13

Figure 4-3 Example 2, VLANs Across Multiple Switches

4.2.1Solving the Problem

To solve the problem in this example, the users are assigned to VLANs using Switch 4 and Switch 2 as shown in Figure 4-3. Redco users are assigned to the Red VLAN and Blue Industries users to the Blue VLAN. The following information shows how Switch 4 and Switch 2 are configured to create the two VLANs to isolate the users of the two companies from one another on the network using the existing infrastructure.

802.1Q VLAN User’s Guide 4-5