Chapter 8 Impact Analysis in MPLS Networks

Supported Fault Scenarios

Link Down Scenario

Table 8-1shows the impact calculations and reported affected severities for a link down fault scenario.

Table 8-1 Link Down Scenario

Impact and Affected Severity

Description

 

 

Impact calculation

Initiates an affected flow to determine the affected parties using the

 

LSPs traversing the link.

 

 

Reported affected severity

The Link Down alarm creates a series of affected severity updates

 

over time. These updates are added to the previous updates in the

 

system database. In this case, the system provides the following

 

reports:

 

The first link down report shows “X<->Y” as Potentially

 

Affected.

 

Over time, the VNE identifies that this service is Real

 

Affected or Recovered and generates an updated report (this

 

applies only to cross-MPLS networks).

 

The Affected Parties tab of the Ticket Properties dialog box

 

displays the latest severity, for example, Real Affected.

 

The Affected Parties Destination Properties dialog box

 

displays both reported severities.

 

This functionality is currently supported for Link Down only.

 

 

Link Overutilized/Data Loss Scenario

Table 8-2shows the impacted calculations and reported affected severities for a link overutilized/data loss fault scenario.

Table 8-2 Link Overutilized/Data Loss Scenario

Impact and Affected Severity

Description

 

 

Impact calculation

Initiates an affected flow to determine the affected parties using the

 

LSPs traversing the link.

 

 

Reported affected severity

Only reports on potentially affected.

 

 

Cisco Active Network Abstraction 3.6.6 MPLS User Guide

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Cisco Systems 3.6.6 manual Link Down Scenario, Link Overutilized/Data Loss Scenario

3.6.6 specifications

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