Cisco Systems 3.6 specifications 10.200.1.2

Page 31

Chapter 4 Advanced Correlation Scenarios

IP Interface Failure Scenarios

•An ip interface status down alarm is generated on the PE. The following correlation information is provided:

•The root cause is device unreachable:

–The ip interface status down alarm is correlated to the device unreachable alarm.

–The syslogs and traps for the related subinterfaces are correlated to the ip interface status down alarm.

Interface Example 3

In this example there is a failure of multiple IP interfaces above the same physical port (mixed point-to-point and multipoint Frame Relay connectivity). CE1 (Router2) has a point-to-point connection to PE1 (Router10). CE1 and CE2 (Router3) have multipoint connections to PE1. The IP interfaces on PE1 that are connected to CE1, and CE2 are all configured above Serial0/0. The “keep alive” option is enabled. A link is disconnected inside the unmanaged network that has caused all the CEs to become unreachable.

Figure 4-5 Interface Example 3

unreachable

interface Serial0/0.100

Router2

point-to-point

10.222.1.2

10.200.1.2

 

 

interface Serial0/0.101

 

point-to-point

unreachable

10.200.1.3

Router2

 

10.222.1.3

 

 

interface Serial0/0.100

 

point-to-point

 

10.200.3.3

Mixed Multipoint and

Point-to-point

connectivity

 

interface Serial0/0.55

 

 

 

multipoint

 

 

Frame-Relay

10.200.1.10

Router10

 

cloud

 

10.222.1.10

 

interface Serial0/0.100

 

 

 

point-to-point

 

 

 

10.200.3.10

 

 

 

All IP interface

180436

 

state to "down"

 

above Serial0/0 change

 

The following failures are identified in the network:

•All the CEs become unreachable.

•An ip interface status down alarm is generated for each IP interface above Serial0/0 that has failed. The following correlation information is provided:

•The root cause is All IP interfaces down on Serial0/0 port:

–The ip interface status down alarms are correlated to the All IP interfaces down alarm.

–The device unreachable alarms are correlated to the All IP interfaces down alarm.

–The syslogs and traps for the related subinterfaces are correlated to the All IP interfaces down alarm.

Interface Example 4

In this example there is a link down. In a situation where a link down occurs, whether it involves a cloud or not, the link failure is considered to be the most probable root cause for any other failures. In this example, a link is disconnected between the unmanaged network and the PE.

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

 

OL-14284-01

4-7

 

 

 

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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 Alarm Integrity Sources of Alarms On a DeviceIntegrity Service Fault Detection and Isolation Integrity Service Cisco ANA Event Correlation and Suppression Event SuppressionCisco ANA Root-Cause Correlation ProcessCorrelation by Flow Root-Cause AlarmsCorrelation Flows Correlation by KeyDC Model Correlation Cache Using WeightsCorrelating TCA Advanced Correlation Scenarios Device Unreachable AlarmConnectivity Test 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 Mpls Interface Removed Alarm BGP Process Down AlarmLDP Neighbor Down Alarm OL-14284-01 Cloud VNE Correlation Over Unmanaged SegmentsTypes of Unmanaged Networks Supported Supported When Logical Inventory Physical Inventory Cloud Correlation Example Cloud Problem AlarmOL-14284-01 Alarm Type Definition Event and Alarm Configuration ParametersRoot Cause Configuration Parameters Event Sub-Type Configuration ParametersGeneral Event 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 AnalysisAccumulating the Affected Parties In the Correlation Tree Accumulating the Affected Parties In an AlarmUpdating Affected Severity Over Time 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 Tx Dormant Rx DormantLink Over Utilized OL-14284-01 Event and Alarm Correlation Flow Figure B-1 Event Correlation Flow VNE level Software Function ArchitectureEvent Creation VNE level Event Correlation FlowEvent Correlation Correlation Logic Event Correlator Alarm Sending Event CorrelatorPost-Correlation Rule 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.

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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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