2Port-based Vlan assignment | Nortel Networks 42C4911 specification

Nortel Networks 42C4911 manual 2Port-based Vlan assignment

Figure 3-2Port-based VLAN assignment

Figure 3-3802.1Q tagging (after port-based VLAN assignment)

42C4911 specifications

Models: 42C4911

Figure 3-2Port-based VLAN assignment

Figure 3-3802.1Q tagging (after port-based VLAN assignment)

42C4911 specifications

Alteon OS Application Guide

42C4911, January 2007

Alteon OS Application Guide

After

42C4911, January 2007

NOTE – The port assignments in the following figures are not meant to match the GbE Switch Module.

		PVID = 2
Untagged packet
				4
CRC	Data	SA	DA	Port
CRC	Data	SA	DA

Before

Port 1		Port 2	Port 3
	802.1Q Switch

Port 6		Port 7	Port 8

Port 5

Tagged member of VLAN 2

Untagged member of VLAN 2

BS45011A

As shown in Figure 3-3, the untagged packet is marked (tagged) as it leaves the switch through port 5, which is configured as a tagged member of VLAN 2. The untagged packet remains unchanged as it leaves the switch through port 7, which is configured as an untagged member of VLAN 2.

PVID = 2

Port 4

Port 1		Port 2	Port 3
	802.1Q Switch

Port 6		Port 7	Port 8

Tagged member of VLAN 2

	Untagged memeber	CRC
	of VLAN 2	CRC
	of VLAN 2
		Data

Outgoing SA

8100	Priority	CFI	VID = 2

16 bits	3 bits	1 bits	12 bits
16 bits	3 bits	1 bits	12 bits
	After

untagged packet (unchanged)

Key
Priority	- User_priority
CFI	- Canonical format indicator
VID	- VLAN identifier

BS45012A

82 Chapter 3: VLANs

Nortel Networks 42C4911 is a key hardware component designed to meet the needs of modern telecommunications infrastructure. As part of Nortel's extensive portfolio, the 42C4911 has made a significant impact on network design and operation, particularly in enterprises requiring reliable and efficient communication solutions.

One of the standout features of the 42C4911 is its modularity. This allows for flexible configurations and upgrades, enabling organizations to adapt to changing technology requirements and business demands. The design philosophy behind the 42C4911 emphasizes scalability, allowing users to start with a basic setup and expand it as their networking needs grow. This feature is particularly appealing to medium and large enterprises that anticipate increased data and communication requirements over time.

In terms of technology, the 42C4911 supports various telecommunications standards, making it versatile for multiple applications. It typically integrates with other Nortel equipment and can work with third-party devices, ensuring seamless interoperability across different platforms. This is critical as organizations look to create unified communications systems that can handle voice, data, and video traffic efficiently.

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Overall, the Nortel Networks 42C4911 stands out as a versatile and powerful component in the telecommunications landscape. Its modular design, compatibility with diverse technologies, reliability, and emphasis on security make it an appealing choice for organizations looking to enhance their networks. As companies continue to navigate the complexities of communication, devices like the 42C4911 play a crucial role in ensuring that they remain connected and efficient.

(*Recalculated)