Cisco Systems Version 3.6 Service Pack 1 Instrukcja Użytkownika Pobierz pdf (Strona 39)

4-15

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

OL-14284-01

Chapter 4 Advanced Correlation Scenarios

Generic Routing Encapsulation (GRE) Tunnel Down/Up

GRE Tunnel Down Correlation Example 2

This example provides a real world scenario, whereby multiple GRE tunnels cross through a physical

link. When this link is shut down by an administrator, many alarms are generated. All the alarms are

correlated to the root cause ticket "Link down due to admin down”, as illustrated in Figure 4-15.

Figure 4-15 GRE Tunnel Down Example 2 (Multiple GRE Tunnels)

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Fault Management User Guide 1
Version 3.6 Service Pack 1 1
CONTENTS 3
Contents 4
7 Impact Analysis 7-1 5
About This Guide 7
Fault Management Overview 9
Basic Concepts and Terms 10
Event Sequence 11
Repeating Event Sequence 12
Flapping Events 12
Correlation By Root Cause 13
Severity Propagation 14
Event Processing Overview 15
OL-14284-01 16
Event Processing Overview 16
Fault Detection and Isolation 17
Alarm Integrity 19
Integrity Service 19
Event Suppression 21
Root-Cause Alarms 23
Correlation Flows 23
DC Model Correlation Cache 24
Using Weights 24
Correlating TCA 24
Device Unreachable Alarm 25
Device Fault Identification 26
All IP Interfaces Down Alarm 29
IP Interface Failure Examples 29
Interface Example 1 30
Interface Example 2 30
Interface Example 3 31
Interface Example 4 31
Interface Example 5 32
ATM Examples 33
Interface Registry Parameters 34
Multi Route Correlation 35
Multi Route Correlation 36
GRE Tunnel Down/Up Alarm 37
BGP Process Down Alarm 41
MPLS Interface Removed Alarm 41
LDP Neighbor Down Alarm 41
LDP Neighbor Down Alarm 42
Cloud VNE 43
Cloud VNE 44
Cloud Problem Alarm 45
Cloud Problem Alarm 46
Alarm Type Definition 47
General Event Parameters 48
Impact Analysis 51
Impact Report Structure 52
Affected Severities 52
Impact Analysis GUI 53
Impact Analysis GUI 54
Disabling Impact Analysis 56
Accumulating Affected Parties 56
Supported Service Alarms 59
• Port down card 61
• Port down 61
Shelf Out 62
Rx Dormant 63
Tx Dormant 63
Link Over Utilized 63
Link Over Utilized 64
APPENDIX 65
Event Correlation Flow 67
Event Correlation Flow 68

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