Cisco Systems network hardware 3.6 Manual

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Cisco Systems network hardware 3.6
CHAPTER
3-1
Cisco Active Network Abstraction Fault Management User Guide, Version 3.6 Service Pack 1
OL-14284-01
3
Cisco ANA Event Correlation and Suppression
This chapter describes how Cisco ANA performs correlation logic decisions:
• Event Suppression—Describes enabling or disabling port-down, port-up, link-down and link-up
alarms on a selected port.
• Root-Cause Correlation Process—Describes the root-cause correlation concept.
• Root-Cause Alarms—Describes the root-cause alarm and weights concepts.
• Correlation Flows—Describes correlation by flow and correlation by key. In addition, it describes
the DC model correlation cache.
Event Suppression
The user can enable or disable the port-down, port-up, link-down, and link-up alarms on a selected port.
By default, alarms are enabled on all ports except for xDSL. When the alarms are disabled on a port, no
alarms will be generated for the port, and they will not be displayed in the ticket pane. Using the Registry
Editor advanced tool, it is possible to enable or disable service alarms on network entities other than
ports, such as the MPBGP (for enabling or disabling BGP neighbor down events), or the MPLS TE
Tunnel (for TE-Tunnel down service alarm). It is also possible to enable or disable alarm specific types
without regard to a specific network entity.
By default, port-down alarms are suppressed on xDSL ports. Cisco ANA supports selectively enabling
sending of port-down alarms on xDSL ports. This can be done by:
• Using a command available in the GUI, right-click on the port in the inventory, select Enable
Sending Alarms.
or
• Setting a flag in the registry under the OID of the port. Changes to the registry should only be carried
out with the support of Cisco Professional Services.
Refer to the Cisco Active Network Abstraction NetworkVision User Guide for information about
disabling or enabling a port alarm.
Events can also be filtered according to their DC type source, for example, all the events that come from
any ATM DC can be filtered by configuring the registry. The following alarm under DC types is filtered
by default:
• VRF—duplicate ip on vpn
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