• Example of Servers Supporting Multiple VLANs with Tagging

"• Example of Servers Supporting Multiple VLANs with Tagging" (Jpg.113)" shows an example network that uses VLANs. In this example network, the physical LAN consists of a switch, two servers, and five clients. The LAN is logically organized into three different VLANs, each representing a different IP subnet. The features of this network are described in "• Example VLAN Network Topology" (Jpg.113).

• Example VLAN Network Topology

Component

Description

VLAN #1

An IP subnet consisting of the Main Server, PC #3, and PC #5. This subnet

 

represents an engineering group.

 

 

VLAN #2

Includes the Main Server, PCs #1 and #2 via shared media segment, and PC

 

#5. This VLAN is a software development group.

 

 

VLAN #3

Includes the Main Server, the Accounting Server and PC #4. This VLAN is

 

an accounting group.

 

 

Main Server

A high-use server that needs to be accessed from all VLANs and IP subnets.

 

The Main Server has a Broadcom adapter installed. All three IP subnets are

 

accessed via the single physical adapter interface. The server is attached to

 

one of the switch ports, which is configured for VLANs #1, #2, and #3. Both

 

the adapter and the connected switch port have tagging turned on. Because of

 

the tagging VLAN capabilities of both devices, the server is able to

 

communicate on all three IP subnets in this network, but continues to

 

maintain broadcast separation between all of them.

 

 

Accounting

Available to VLAN #3 only. The Accounting Server is isolated from all traffic

Server

on VLANs #1 and #2. The switch port connected to the server has tagging

 

turned off.

 

 

PCs #1 and #2

Attached to a shared media hub that is then connected to the switch. PCs #1

 

and #2 belong to VLAN #2 only, and are logically in the same IP subnet as

 

the Main Server and PC #5. The switch port connected to this segment has

 

tagging turned off.

 

 

E

1 1 Gbit/s Ethernet I/O Module 113

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Fujitsu PG-FCS102, PG-FCS103, BX620 manual Component Description