Redundancy

Managing CMM Directory Content	CMM Files

CMM software redundancy is one of the switch’s most important fail over features. For CMM software redundancy, at least two fully-operational OmniSwitches must be linked together as a stack. In addition, the CMM software must be synchronized. (Refer to “Synchronizing the Primary and Secondary CMMs” on page 4-26for more information.)

When two OmniSwitches are running in a stack, one switch has the primary role and one switch has the secondary role at any given time. (The primary and secondary roles are determined by the switch number indicated on the LED on the front panel; the lowest number switch becomes the primary switch in the stack.) The primary switch manages the current switch operations while the secondary switch provides backup (also referred to as “fail over”).

Additional OmniSwitches in a stack are set to “idle” for the purposes of redundancy. For more informa- tion on managing a stack of switches, see “Managing Stacks” in the OmniSwitch 6600 Family Hardware Users Guide.

Note. A redundant stacking cable is required to fully support redundancy.

Redundancy Scenarios

The following scenarios demonstrate how the CMM software is propagated to other switches in a stack for the purposes of coherent redundancy. In the examples below W represents the working directory and C represents the certified directory.

Scenario 1: Booting the Stack

The following diagram illustrates what occurs when a stack powers up. The stack displayed is a three switch stack.

Switch #1		Switch #2
W	C	W	C

Switch #3

1.Stack is pow- ered up and boots from the certified directory.

2.The contents of the certified direc- tory of the primary CMM switch are copied to the working directory of the secondary CMM switch. The working directory is then copied to the certified direc- tory.

3.The contents of the certified direc- tory of the pri- mary CMM switch are copied to the working directory of additional switches. The working directory is then copied to the certified direc- tory.

Powering Up a Stack

This process occurs automatically when the switch boots. The working and certified directory relationship described above in “Software Rollback Feature” on page 4-4still apply to the primary CMM switch.

OmniSwitch 6600 Family Switch Management Guide March 2005

page 4-9

omniswitch specifications

Alcatel Carrier Internetworking Solutions offers the OmniSwitch series, renowned for its robust capabilities in delivering high-performance networking solutions tailored for a variety of enterprise and service provider environments. The OmniSwitch series is particularly recognized for its scalability, flexibility, and the depth of its feature set, making it a popular choice for organizations that demand reliable and efficient networking solutions.

One of the standout features of the OmniSwitch series is its advanced Layer 2 and Layer 3 switching capabilities, providing organizations with essential support for IP routing and robust Ethernet networking. This versatility ensures that the switch can seamlessly integrate into existing network architectures, facilitating smooth upgrade paths in response to evolving business needs. The OmniSwitch includes support for multiple protocols like RIP, OSPF, and BGP, making it suitable for complex networking topologies.

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Security is another key characteristic of the OmniSwitch series. It includes advanced security features such as robust access control lists (ACLs), port security, and built-in support for IEEE 802.1X authentication. These features collectively enhance the security posture of the network, protecting sensitive data and ensuring that only authorized devices can access the network resources.

The OmniSwitch is also designed with redundancy and reliability in mind. Features like Rapid Spanning Tree Protocol (RSTP) and Virtual Router Redundancy Protocol (VRRP) ensure that network uptime is maximized and that failover is swift in the event of a hardware failure. This makes it a viable option for organizations that cannot afford downtime.

In addition to these features, Alcatel's OmniSwitch series comes equipped with a user-friendly management interface. This interface simplifies the setup, configuration, and monitoring of the network, making it accessible even to those with limited networking expertise. Through intuitive dashboards and support for SNMP, administrators can manage their networks effectively.

In conclusion, Alcatel Carrier Internetworking Solutions' OmniSwitch series offers a comprehensive suite of features tailored to meet the needs of modern networks. With its blend of performance, scalability, security, and ease of management, the OmniSwitch stands out as a preferred choice for businesses seeking to enhance their networking infrastructure.

Alcatel Carrier Internetworking Solutions omniswitch manual Redundancy Scenarios

Models: omniswitch

Managing CMM Directory Content