Sun Microsystems Gigabit Ethernet MMF/UTP Adapter 1 shows an example network that uses VLANs

Although VLANs are commonly used to create individual broadcast domains and/or separate IP subnets, it can be 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.

	Main Server
Accounting	Adapter
Server	Gigabit/Tagged
(VLAN 3)	(All VLANs)

VLAN 1

VLAN 2

VLAN 3

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.

58 Sun PCI-Express Dual Gigabit Ethernet MMF/UTP Adapter Installation and User’s Guide • June 2006