user manual
Table Of Contents
- Cisco Active Network Abstraction Fault Management User Guide Version 3.6 Service Pack 1
- Contents
- About This Guide
- Fault Management Overview
- Fault Detection and Isolation
- CiscoANA Event Correlation and Suppression
- Advanced Correlation Scenarios
- Device Unreachable Alarm
- IP Interface Failure Scenarios
- Multi Route Correlation
- Generic Routing Encapsulation (GRE) Tunnel Down/Up
- BGP Process Down Alarm
- MPLS Interface Removed Alarm
- LDP Neighbor Down Alarm
- Correlation Over Unmanaged Segments
- Event and Alarm Configuration Parameters
- Impact Analysis
- Supported Service Alarms
- Event and Alarm Correlation Flow
CHAPTER
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Cisco Active Network Abstraction Fault Management User Guide, Version 3.6 Service Pack 1
OL-14284-01
5
Correlation Over Unmanaged Segments
This chapter describes how Cisco ANA performs correlation decisions over unmanaged segments,
namely, clouds.
• Cloud VNE—Describes managing more than one network segment that interconnects with others,
over another network segment which is not managed.
• Cloud Problem Alarm—Describes the cloud problem alarm, its correlation, and provides an
example.
Cloud VNE
In some scenarios Cisco ANA is required to manage more than one network segment that interconnects
with others over another network segment which is not managed. In such setups, faults on one device
might be correlated to faults on another device that is located on the other side of the unmanaged segment
of the network, or to unknown problems in the unmanaged segment itself.
A virtual cloud is used for representing unmanaged network segments. It represents the unmanaged
segment of the network as a single device that the two managed segments of the network are connected
to, and has that device simulate the workings of the unmanaged segment.
Virtual clouds support specific network setups. The types of unmanaged networks that are supported are:
• Frame Relay
• AT M
• Ethernet
Types of Unmanaged Networks Supported
This section describes the types of unmanaged networks that are supported when a VNE simulates an
unmanaged segment of a network.
Note The unmanaged segments referred to in this section must be pure switches, no routing can be involved
with the segment.