Alteon OS Application Guide

„Access Control Groups

An Access Control Group (ACL Group) is a collection of ACLs. For example:

ACL Group 1

ACL 1:

VLAN = 1

SIP = 10.10.10.1 (255.255.255.0)

Action = permit

ACL 2:

VLAN = 2

SIP = 10.10.10.2 (255.255.255.0)

Action = deny

ACL 3:

Priority = 7

DIP = 10.10.10.3 (255.255.255.0)

Action = permit

In the example above, each ACL defines a filter rule. ACL 3 has a higher precedence than ACL 1, based on its number.

Use ACL Groups to create a traffic profile by gathering ACLs into an ACL Group, and assigning the ACL Group to a port. The GbESM supports up to 384 ACL Groups.

ACL Metering and Re-marking

You can define a profile for the aggregate traffic flowing through the GbESM ports, by config- uring a QoS meter (if desired), and assigning ACL Groups to ports. When you add ACL Groups to a port, make sure they are ordered correctly in terms of precedence.

For example, consider two ACL Groups, ACL Group 1 and ACL Group 2. Each contains three levels of precedence. If you add ACL Group 1 to a port, then add ACL Group 2 to the port, the port’s ACL filters contain a total of six precedence levels. ACL Group 1 has precedence over ACL Group 2.

Each port supports up to seven precedence levels.

Actions taken by an ACL are called In-Profileactions. You can configure additional In-Profile and Out-of-Profile actions on a port. Data traffic can be metered, and re-marked to ensure that the traffic flow provides certain levels of service in terms of bandwidth for different types of network traffic.

130 „ Chapter 7: Quality of Service

42C4911, January 2007

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Nortel Networks 42C4911 manual ACL Metering and Re-marking, „ Access Control Groups
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42C4911 specifications

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.

The 42C4911 is known for its robust performance and reliability. It is designed to operate continuously under demanding conditions, which is essential for organizations that rely on constant connectivity for their operations. Its built-in redundancy features help safeguard against potential failures, thus enhancing the overall stability of the network. This reliability is further complemented by Nortel's commitment to high-quality manufacturing standards, ensuring that users receive a durable and efficient product.

Security is another major consideration for any networking device, and the 42C4911 provides advanced security features to protect sensitive data. With increasing cybersecurity threats, organizations prioritize devices that offer strong encryption and access control mechanisms. The 42C4911 addresses these needs while facilitating secure communication channels for users, which is essential in today's increasingly interconnected world.

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.
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