Root Cause and Impact Analysis

This section provides information on root cause and impact analysis for various events.

Following table lists the root-cause problem diagnosed and the impacted classes.

Table 1. Root-cause problems for VIO management classes

Class	Root Casue	Event (symptoms) of root cause	Impacted System
Host	Down	Down	Hypervisor
		DownOrImpaired	VirtualMachines
		Unresponsive	Host
		InterfaceLostConnection	Interface
		ServiceAffected	ControllerService ComputeService
		AtRisk ReducedRedendancy AllComponentsDown	ControllerServiceCluster
Hypervisor	Down	DownOrImpaired	VirtualMachines
		HostLostConnection	Hypervisor
		PowerOff	Hypervisor
		InterfaceLostConnection	Interface
		ServiceAffected	ControllerService ComputeService
		AtRisk ReducedRedendancy AllComponentsDown	ControllerServiceCluster
VirtualMachine	Down	DownOrImpaired	VirtualMachine
		ServiceAffected	ControllerService ComputeService
		AtRisk ReducedRedendancy AllComponentsDown	ControllerServiceCluster

The Server Manager provides:

• Impact analysis and diagnosis when a hypervisor server is down. For example, it diagnoses when a VMware hypervisor host goes down (Host Down) and identifies the impact to a virtual machine (Down).
• Impact analysis and diagnosis when a physical switch is down. For example, it diagnoses when a physical switch goes down and identifies the impact to the hypervisor and virtual machines.
• Impact analysis and diagnosis when a hypervisor server is down. For example, it diagnoses when a hypervisor host goes down (Host Down) and identifies the impact to ComputeService or ControllerService (Service Affected).
• Impact analysis and diagnosis when a Virtual Machine is down. For example, it diagnoses when a Virtual Machine goes down (Host Down) and identifies the impact to ComputeService or ControllerService (Service Affected).
• Impact analysis and diagnosis when a Virtual Machine is down. For example, it diagnoses when a Virtual Machine goes down (Host Down) and identifies the impact to ClusterManager (Service Affected).
• Impact analysis and diagnosis when a logical/tap interface is down. For example, it diagnoses when a logical interface goes down (Interface Down) and identifies the impact to a virtual machine (VMLostConnection).
• Impact analysis and diagnosis when a vRouter is down. For example, it diagnoses when a vRouter goes down and identifies the impact to a virtual machine.
• Impact analysis and diagnosis when a virtual interface is down. For example, it diagnoses when the virtual interface of a vRouter or virtual machine goes down and identifies the impact to a virtual machine.
• Impact analysis and diagnosis when the physical interface of the hypervisor is down. For example, it diagnoses when a physical interface goes down and identifies the impact to a virtual machine.
• Impact analysis and diagnosis when a host hosting OpenStack service is down. For example, it diagnoses when a host hosting OpenStack service goes down and identifies the impact to CloudController and VMs.

Physical Hypervisor hosting Host Down

Hypervisor Down

Compute VirtualMachine PoweredOff