Cisco Systems 3.6 specifications Fault Detection and Isolation, Unreachable Network Elements

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C H A P T E R 2

Fault Detection and Isolation

This chapter describes unreachable network elements and the sources of alarms on devices. In addition, it describes alarm integrity and the integrity service:

•Unreachable Network Elements—Describes how the various VNEs use reachability to check connectivity with the NEs.

•Sources of Alarms On a Device—Describes the four basic alarm sources that indicate problems in the network.

•Alarm Integrity—Describes what happens when a VNE with associated open alarms shuts down.

•Integrity Service—Describes the integrity service tests that run on the gateway and/or the units.

Unreachable Network Elements

Reachability used by the VNEs (checks the reachability between the VNEs and NEs) depends on the configuration of the VNE, and involves multiple connectivity tests, using SNMP, Telnet/SSH and/or ICMP, as appropriate.

The table describes the various situations below when a NE fails to respond to the protocols:

Table 2-1

Unreachable Network Elements

 

 

 

 

 

VNE Type

Checks reachability using

When the NE fails to respond

When the NE is reachable

 

 

 

 

ICMP VNE

ICMP only. During the ICMP

ICMP ping is suspended, and a VNE

ICMP ping is restarted, and the

 

test the unit pings the NE

Unreachable alarm is sent to the

alarm is cleared.

 

every configured interval.

Cisco ANA Gateway. Only the

 

 

 

reachability tests are executed thereafter to

 

 

 

detect when the device is reachable again.

 

 

 

 

 

Cisco Active Network Abstraction Fault Management User Guide, Version 3.6 Service Pack 1

 

OL-14284-01

2-1

 

 

 

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Contents Americas Headquarters Page N T E N T S Multi Route Correlation Cloud VNE Alarm Sending Event Correlator Vii About This GuideViii Managing Events Fault Management OverviewBasic Concepts and Terms AlarmEvent Sequence EventFlapping Events Repeating Event SequenceTicket Correlation By Root CauseSequence Association and Root Cause Analysis Severity PropagationEvent Processing Overview OL-14284-01 Unreachable Network Elements Fault Detection and IsolationVNE Integrity Service Sources of Alarms On a DeviceAlarm Integrity Fault Detection and Isolation Integrity Service Cisco ANA Event Correlation and Suppression Event SuppressionCisco ANA Root-Cause Correlation ProcessCorrelation Flows Root-Cause AlarmsCorrelation by Key Correlation by FlowCorrelating TCA Using WeightsDC Model Correlation Cache Connectivity Test Device Unreachable AlarmAdvanced Correlation Scenarios Device Unreachable Example Device Fault IdentificationIP Interface Failure Scenarios IP Interface Status Down AlarmCorrelation of Syslogs and Traps IP Interface Failure Examples All IP Interfaces Down AlarmInterface Example 10.200.1.2 General Interface Example Ethernet, Fast Ethernet, Giga Ethernet Examples ATM ExamplesIp interface status down Parameters Interface Registry ParametersMulti Route Correlation Example Multi Route Correlation11 Multi Route Correlation Example Generic Routing Encapsulation GRE Tunnel Down/Up GRE Tunnel Down/Up Alarm14 GRE Tunnel Down Example 1 Single GRE Tunnel GRE Tunnel Down Correlation Example15 GRE Tunnel Down Example 2 Multiple GRE Tunnels 16 Alarms Correlation to GRE Tunnel Down Ticket LDP Neighbor Down Alarm BGP Process Down AlarmMpls Interface Removed Alarm OL-14284-01 Types of Unmanaged Networks Supported Correlation Over Unmanaged SegmentsCloud VNE Supported When Logical Inventory Physical Inventory Cloud Correlation Example Cloud Problem AlarmOL-14284-01 Alarm Type Definition Event and Alarm Configuration ParametersGeneral Event Parameters Event Sub-Type Configuration ParametersRoot Cause Configuration Parameters Network Correlation Parameters Correlation Configuration ParametersFlapping Event Definitions Parameters System Correlation Configuration ParametersImpact Analysis Options Impact AnalysisAffected Severities Impact Report StructureAffected Parties Tab Impact Analysis GUIViewing a Detailed Report For the Affected Pair Detailed Report For the Affected Pair Accumulating Affected Parties Disabling Impact AnalysisUpdating Affected Severity Over Time Accumulating the Affected Parties In an AlarmAccumulating the Affected Parties In the Correlation Tree OL-14284-01 BGP process up Shut down on a device Supported Service AlarmsAll ip interfaces Sent when all IP interfaces True Warnin Shelf Out Link Over Utilized Rx DormantTx Dormant OL-14284-01 Event and Alarm Correlation Flow Figure B-1 Event Correlation Flow VNE level Software Function ArchitectureEvent Correlation Event Correlation FlowEvent Creation VNE level Post-Correlation Rule Event Correlator Alarm Sending Event CorrelatorCorrelation Logic Event Correlator
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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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