L2 Failover Configurations, InternetI t t

Alteon OS Application Guide

Configuration Guidelines

This section provides important information about configuring L2 Failover:

A failover trigger can monitor multiple static trunks or a single LACP key, but not both.

With VLAN Monitor on, the following additional guidelines apply:

All external ports in all trunks that are added to a single failover trigger must have the same VLAN membership and have the same PVID.

Each failover trigger must operate on a different VLAN membership.

Multiple failover triggers cannot operate on the same internal port.

For each port in each trunk in a failover trigger, the trigger monitors the STP state only on the default PVID.

L2 Failover Configurations

Figure 13-1is a simple example of Layer 2 Failover. One GbE Switch Module is the primary, and the other is used as a backup. In this example, all external ports on the primary switch belong to a single trunk group, with Layer 2 Failover enabled, and Failover Limit set to 2. If two or fewer links in trigger 1 remain active, the switch temporarily disables all internal server- blade ports that reside in VLAN 1. This action causes a failover event on Server 1 and Server 2.

Trigger 1

InternetI t t

Trigger 1

Enterprise

Routing Switch

Primary
GbESM	Server 1
	Server 2
	Server 3
Backup
GbESM	Server 4
	Server 4
	BladeCenter

VLAN 1:

VLAN 2:

VLAN Monitor = On

Figure 13-1Basic Layer 2 Failover

220 Chapter 13: High Availability

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 L2 Failover Configurations, InternetI t t

Models: 42C4911