Manuals / D-Link / Computer Equipment / Switch

D-Link DES-3225G Sharing Resources Across 802.1Q VLANs, 802.1Q VLANs Spanning Multiple Switches

Models: DES-3225G

1 175
Download 175 pages 12 Kb
Page 33
Image 33

24-port NWay Ethernet Switch User’s Guide

Sharing Resources Across 802.1Q VLANs

Network resources such as printers and servers however, can be shared across 802.1Q VLANs. This is achieved by setting up overlapping VLANs as shown in the diagram below.

VLAN 3

 

 

VLAN 1

 

VLAN 2

 

 

 

 

 

 

 

 

 

 

1

2

3

4

5

6

7

8

9 10 11 12

 

 

 

 

 

 

 

 

P o rt

 

 

 

 

 

 

 

 

V I Ds = 2

P o rt

P ort

V ID s = 1

P V ID = 3

 

 

 

 

 

 

 

 

 

Workstations

Network

Graphics

 

Server

Workstations

Figure 5-4. Example of typical VLAN configuration

In the above example, there are three different 802.1Q VLANs and each port can transmit packets on one of them according to their Port VLAN ID (PVID). However, a port can receive packets on all VLANs (VID) that it belongs to. The assignments are as follows:

PVID

 

Ports

(Port VLAN

 

 

ID)

 

 

1

 

Port 1

1

 

Port 2

1

 

Port 3

2

 

Port 11

2

 

Port 12

3

 

Port 7

 

 

 

VID

 

Member

(VLAN ID)

 

Ports

11,2,3,7

27,11,12

31,2,3,7,11,12

Table 5-2. VLAN assignments for Figure 5-4

The server attached to Port 7 is shared by VLAN 1 and VLAN 2 because Port 7 is a member of both VLANs (it is listed as a member of VID 1 and 2). Since it can receive packets from both VLANs, all ports can successfully send packets to it. Ports 1, 2 and 3 send these packets on VLAN 1 (their PVID=1), and Ports 11 and 12 send these packets on VLAN 2 (PVID=2). The third VLAN (PVID=3) is used by the server to transmit files that had been requested on VLAN 1 or 2 back to the computers. All computers that use the server will receive transmissions from it since they are all located on ports which are members of VLAN 3 (VID=3).

802.1Q VLANs Spanning Multiple Switches

802.1Q VLANs can span multiple switches as well as your entire network. Two considerations to keep in mind while building VLANs of this sort are whether the switches are IEEE 802.1Q-compliant and whether VLAN packets should be tagged or untagged.

Definitions of relevant terms are as follows:

Switch Management Concepts

23

Page 32 Page 34
Page 33
Image 33
D-Link DES-3225G manual Sharing Resources Across 802.1Q VLANs, 802.1Q VLANs Spanning Multiple Switches
Page 32 Page 34

DES-3225G specifications

The D-Link DES-3225GF and DES-3225G are both robust Ethernet switches designed to meet the networking needs of small to medium-sized enterprises and organizations. These devices are part of D-Link's comprehensive range of unmanaged layer 2 switches, known for their reliability and ease of use.

The DES-3225GF features a total of 25 Ethernet ports, including 24 10/100Base-TX ports and 1 Gigabit SFP slot, while the DES-3225G also comes with 25 ports but includes 24 10/100/1000 Mbps copper ports. Both models support Auto-MDI/MDI-X for seamless connection setup without the need for crossover cables, simplifying the deployment process.

One of the standout features of these switches is their wire-speed performance that enables high-speed data transfers and efficient traffic management. Each port is designed to provide non-blocking switching, which ensures that the bandwidth is fully utilized without any packet loss. The switches support IEEE 802.3x flow control, which helps to manage data flow and prevent overflow during heavy traffic periods.

The DES-3225GF and DES-3225G offer users a simple yet efficient way to expand their network. With a plug-and-play design, they require minimal configuration, allowing for quick integration into existing network infrastructures. These switches are equipped with a durable chassis, ensuring they can withstand the rigors of a busy IT environment.

Both models boast energy-efficient technologies that comply with IEEE 802.3az, which helps in reducing power consumption during periods of inactivity. By detecting link status and adjusting power accordingly, these switches contribute to a more sustainable networking solution.

In terms of form factor, the DES-3225GF and DES-3225G are rack-mounted, making them suitable for integration into standard network cabinets. This design ensures that the devices can be efficiently managed alongside other network equipment.

For management and security, the switches support features such as VLAN tagging and port security, allowing network administrators to segment traffic and protect the network from unauthorized access. With their sturdy build, innovative features, and straightforward implementation, the D-Link DES-3225GF and DES-3225G are ideal choices for organizations looking to enhance their network performance while keeping costs manageable.