Summary of ACL Actions

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Actions determine how the traffic is treated. The GbESM QoS actions include the following:

Pass or Drop

Re-mark a new DiffServ Code Point (DSCP)

Re-mark the 802.1p field

Set the COS queue

Understanding ACL Precedence

Each ACL has a unique precedence level, based on its number. When an incoming packet matches the highest precedence ACL, the ACL’s configured action takes place. The other assigned ACLs also are considered, in order of precedence.

ACLs are divided into seven major Precedence Groups, as shown in Table 7-4.

Table 7-4ACL Precedence Groups

Precedence Group	ACLs	Precedence Level

Precedence Group 1	ACL 1 - ACL 128	Low

Precedence Group 2	ACL 129 - ACL 256


Precedence Group 3	ACL 257 - ACL 384	High
		High

NOTE – Precedence Groups are not related to ACL Groups.

Each Precedence Group has its own precedence level, such that Precedence Group 2 has a higher precedence level than Precedence Group 1. Within each Precedence Group, the lowest- numbered ACL has the lowest precedence level, and the highest-numbered ACL has the high- est precedence level. However, the other ACLs within the Precedence Group have an unspeci- fied precedence level, as follows:

ACL 1 = lowest precedence level within Precedence Group 1

ACL 2 = unspecified precedence level within Precedence Group 1 ACL 3 = unspecified precedence level within Precedence Group 1

...

ACL 126 = unspecified precedence level within Precedence Group 1 ACL 127 = unspecified precedence level within Precedence Group 1

ACL 128 = highest precedence level within Precedence Group 1

128 Chapter 7: Quality of Service

42C4911, January 2007

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.

Nortel Networks 42C4911 manual Summary of ACL Actions, Understanding ACL Precedence

Models: 42C4911

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