Manuals / Nortel Networks / Computer Equipment / Switch

Nortel Networks 42C4911 manual Setting the Failover Limit, L2 Failover with Other Features

Models: 42C4911

1 260
Download 260 pages 54.2 Kb
Page 219
Image 219

Alteon OS Application Guide

Setting the Failover Limit

The failover limit lets you specify the minimum number of operational links required

within each trigger before the trigger initiates a failover event. For example, if the limit is two (/cfg/l2/failovr/trigger x/limit 2), a failover event occurs when the number of operational links in the trigger is two or fewer. When you set the limit to zero, the switch triggers a failover event only when no links in the trigger are operational.

L2 Failover with Other Features

L2 Failover works together with Link Aggregation Control Protocol (LACP) and with Spanning Tree Protocol (STP), as described below.

LACP

Link Aggregation Control Protocol allows the switch to form dynamic trunks.

You can use the admin key to add LACP trunks to a failover trigger. When you add an admin key to a trigger (/cfg/failovr/trigger x/amon/addkey), any LACP trunk with that admin key becomes a member of the trigger.

Spanning Tree Protocol

If Spanning Tree Protocol (STP) is enabled on the ports in a failover trigger, the switch moni- tors the port STP state rather than the link state. A port failure results when STP is not in a For- warding state (that is, Listening, Learning, Blocking, or No Link). The switch automatically disables the appropriate internal ports, based on the VLAN monitor.

When the switch determines that ports in the trigger are in STP Forwarding state, then it auto- matically enables the appropriate internal ports, based on the VLAN monitor. The switch fails back to normal operation.

42C4911, January 2007

Chapter 13: High Availability „ 219

Page 218 Page 220
Page 219
Image 219
Nortel Networks 42C4911 manual Setting the Failover Limit, L2 Failover with Other Features, Spanning Tree Protocol
Page 218 Page 220

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.