Chapter 2 Fault Detection and Isolation

Sources of Alarms On a Device

Sources of Alarms On a Device

The following basic sources of alarms exist in the system which indicate a problem in the network:

•Service Alarms—Alarms generated by the VNE as a result of polling (for example SNMP, Telnet). Usually such alarms (for example link down, card out, device unreachable and so on) are configured in such a way that they can become root cause alarms, according to the correlation algorithms.

Service alarms can also be generated by the gateway, for example. the vpn leak alarm.

•SNMP Traps—Traps sent by the network elements and captured by the Cisco ANA platform. The platform supports SNMP v1, v2 and v3 traps. The traps are then forwarded to the specific VNEs for further processing and correlation logic. In addition, reliable traps (inform commands) are supported, when configured in the registry, where the VNE acknowledges that a trap was received.

•Syslogs—Syslog messages sent by the network elements and captured by the Cisco ANA platform. The Syslogs are then forwarded to the specific VNEs for further processing and correlation logic.

•TCA—Cisco ANA can be used to set a TCA for soft properties. The TCA can be enabled to assign a condition to the property which will trigger an alarm when violated. The alarm conditions could be:

–Equal or not equal to a target value.

–Exceeding a defined value range (defined by maximum and minimum thresholds, including hysteresis), for example CPU level of a device.

–Exceeding a defined rate (calculated across time), for example bandwidth or utilization rate of a link.

•System Alarms—Alarms generated by the gateway and/or the units, for example, disk full, database full, unit unreachable and so on. For more information see Integrity Service.

For information about TCAs see the Cisco Active Network Abstraction Customization User Guide.

Alarm Integrity

When the VNE shuts down while it still has open alarms associated with it, “fixing” events which occur during the down period will be consolidated when the VNE is reloaded.

Integrity Service

The integrity service is an internal service that runs on the gateway and/or the units, which is responsible for the stability of the system by running integrity tests in order to maintain the database and eliminate clutter in the system. In order to prevent the session from stopping, the integrity service tests are run on a different thread in a separate directory called integrity.

The service integrity tests are run:

•Manually—The integrity service tests are accessed as part of the Cisco ANA Shell management services, and they can be accessed by telneting the gateway.

To run a test, the user should cd to the integrity dir, and then enter executeTest followed by the test name. The user can pass parameters to the tests using Cisco ANA Shell.

•Automatically—The integrity service tests are scheduled as crontab commands, to run specific tests at specific intervals. By default the integrity service tests run automatically every 12 hours.

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Cisco Systems 3.6 specifications Sources of Alarms On a Device, Alarm Integrity, Integrity Service
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3.6 specifications

Cisco Systems 3.6 marks a significant advancement in network technology, presenting an innovative suite of features and capabilities designed to enhance performance, security, and flexibility for modern networks. As a leader in networking solutions, Cisco continues to evolve its offerings, ensuring they meet the demands of businesses operating in increasingly complex environments.

One of the standout features of Cisco Systems 3.6 is the introduction of enhanced automation capabilities. Automation reduces the manual effort required for network management, allowing IT teams to focus on strategic initiatives rather than routine maintenance. The system leverages advanced machine learning algorithms to analyze network behavior, detect anomalies, and suggest optimizations, which enhances operational efficiency and uptime.

In terms of security, Cisco Systems 3.6 integrates robust cybersecurity measures directly into its architecture. It incorporates Cisco's SecureX framework, which provides centralized visibility and control across the entire security stack. This feature allows organizations to respond rapidly to threats, leveraging threat intelligence and automated response mechanisms to mitigate risks effectively.

Another notable characteristic is improved compatibility with cloud environments. With the rise of hybrid cloud models, Cisco Systems 3.6 offers seamless integration capabilities that enable businesses to connect their on-premises networks with public and private cloud infrastructures. This ensures greater flexibility and enhanced performance for cloud-based applications.

Cisco also emphasizes software-defined networking (SDN) with its updated platform. This approach allows for greater agility, enabling network administrators to programmatically manage resources through a centralized interface. SDN facilitates rapid deployment of services and applications, optimizing the overall user experience.

Cisco Systems 3.6 also boasts enhanced collaboration tools, fostering improved communication across teams. Featuring advanced video conferencing and messaging capabilities, it enhances productivity and streamlines processes, regardless of employee location. These tools are designed to support remote work environments, which have become increasingly important in today's business landscape.

Furthermore, energy efficiency is a core aspect of Cisco Systems 3.6. The system is designed to optimize power consumption and reduce overall operating costs, aligning with global sustainability goals. The efficient design prioritizes environmentally friendly practices while still delivering high performance.

In conclusion, Cisco Systems 3.6 represents a comprehensive evolution in networking technology, focusing on automation, security, cloud integration, SDN, collaboration, and energy efficiency. These features position Cisco as a pivotal player in supporting organizations as they navigate the complexities of digital transformation and the future of networking.
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