Example 4, Isolating Network Traffic According to Protocol

Two 1Q Trunk ports must be activated and configured on Switch 3, and one 1Q Trunk port must be activated and configured on Switch 4.

Ports 2, 3, 4, 5, 6, 7, and 8 of Switch 5 are connected to the Publication Department devices. These ports will be configured to classify all AppleTalk frames into the AppleTalk VLAN (Grey). The same ports will also be configured to classify all other protocol frames into a second VLAN (Yellow). Port 1 will be assigned to the Yellow VLAN to handle the traffic between Switch 3 and 5.

Switch 3

Switch 3 is set as follows:

1.One VLAN is added to the list of VLANs in the Device/VLAN Configuration screen. In this example, Switch 3 is set as follows:

VLAN ID 5, FID 5, with a VLAN Name of Yellow

2.The Forward Default VLAN Out All Ports is set to YES using the Device/VLAN Configuration screen. This adds the Default VLAN to the Port VLAN List of every switch port and all VLANs become members of FID 1.

3.A Port VLAN ID is assigned to Port 3 using the Port Assignment screen, as follows:

Port 3, VLAN ID: 5, FID 5

4.The port mode of Ports 2 and 4 are set using the Port Assignment screen:

Port 2, Port Mode: 1Q Trunk

Port 4, Port Mode: 1Q Trunk

Ports 2, and 4 are set as 802.1Q Trunk ports, which makes these ports eligible to transmit frames of all VLANs, and sets all frames forwarded out these ports as tagged frames. This allows traffic from Switch 4 to reach Switch 2 on the network backbone.

Switch 5

Switch 5 is set as follows:

1.Two VLANs are added to the list of VLANs in the Device/VLAN Configuration screen. In this example, it is set as follows:

VLAN ID 5, FID 5, with a VLAN Name of Yellow

VLAN ID 6, FID 6, with a VLAN Name of Grey

2.The Forward Default VLAN Out All Ports is set to YES using the Device/VLAN Configuration screen. This adds the Default VLAN to the Port VLAN List of every switch port.

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Enterasys Networks 802.1Q manual 16Examples

802.1Q specifications

Enterasys Networks, a subsidiary of the Siemens Group, is widely recognized for its comprehensive networking solutions, with a strong emphasis on security, reliability, and performance. One of the key technologies offered by Enterasys is 802.1Q, a critical component of Ethernet networking that establishes standards for VLAN (Virtual Local Area Network) tagging. This technology is essential for enhancing network performance and managing traffic efficiently.

The primary feature of 802.1Q is its ability to create VLANs, which segment a physical network into multiple logical networks. This segmentation improves network security by isolating sensitive data and restricting access to specific users or devices. With VLANs, organizations can reduce broadcast traffic, thereby enhancing overall network efficiency. Different departments within an organization can operate on their own VLAN, ensuring that their traffic is kept separate from others.

One significant technological aspect of 802.1Q is its tagging method. When a frame passes through a switch port configured for IEEE 802.1Q, the switch appends a VLAN tag to the frame. This tag contains important information, such as the VLAN ID, enabling switches and devices throughout the network to identify which VLAN the frame belongs to. This tagging is especially critical in environments where multiple VLANs share the same physical infrastructure.

Another characteristic of Enterasys Networks' implementation of 802.1Q is interoperability with existing network standards and protocols. This means that organizations can implement VLAN tagging without requiring major upgrades or replacements of their switch hardware. Enterasys ensures that its switches are compliant with various industry standards, making it easier for enterprises to integrate these solutions into their existing network settings.

Security is another vital feature of Enterasys Networks’ 802.1Q offering. By leveraging VLANs, organizations can enforce stricter access controls and policies, reducing the risk of unauthorized access to sensitive network segments. This is particularly beneficial for industries with stringent compliance requirements, such as finance and healthcare.

In summary, Enterasys Networks' 802.1Q technology plays a pivotal role in modern networking by facilitating VLAN creation, enabling efficient traffic management, ensuring interoperability, and bolstering network security. As organizations increasingly rely on connected devices and data-driven processes, technologies like 802.1Q are essential for building robust, scalable, and secure networking environments.