Sun Microsystems X1150A manual 1shows an example network that uses VLANs

Although VLANs are commonly used to create individual broadcast domains and/ or separate IP subnets, it is sometimes useful for a server to have a presence on more than one VLAN simultaneously. Several Sun products support multiple VLANs on a per port or per interface basis, allowing very flexible network configurations.

FIGURE 5-1shows an example network that uses VLANs

.

VLAN 1

VLAN 2

VLAN 3

Accounting

Server

(VLAN 3)

Main Server

Adapter

Gigabit/Tagged

(All VLANs)

1	2	3	4	5	6	7	8
							1	2	3	4	5	6	7	8
														9
			10/100 Base - TX											Gigabit Ethernet

Shared Media Segment

Software	Software	Engineering	Accounting	Engineering/
PC 1	PC 2	PC 3	PC 4	Software PC 5
(VLAN 2)	(VLAN 2)	(VLAN 1)	(VLAN 3)	Adapter
				Gigabit/Tagged
				(VLAN 1 & 2)

FIGURE 5-1Example of Servers Supporting Multiple VLANs with Tagging Adapters

The example network has the following features:

■The physical LAN network consists of a switch, two servers, and five clients.

■The LAN is logically organized into three different VLANs, each representing a different IP subnet.

■VLAN 1 is an IP subnet consisting of the Main Server, Client 3, and Client 5. This represents an engineering group.

■VLAN 2 includes the Main Server, Clients 1 and 2 via shared media segment, and Client 5. This is a software development group.

■VLAN 3 includes the Main Server, the Accounting Server and Client 4. This is an accounting group.

64 Sun GigaSwift Ethernet Adapter Installation and User’s Guide • February 2003