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

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

8-4 OL-19192-01