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
5-2
Cisco Active Network Abstraction Fault Management User Guide, Version 3.6 Service Pack 1
OL-14284-01
Chapter 5 Correlation Over Unmanaged Segments
Cloud VNE
Fault Correlation Across the Frame Relay or ATM or Ethernet Cloud
When a Layer 3 or Layer 2 event (for example, reachability problem, neighbor change, Frame Relay
DLCI down, ATM PVC down) occurs, it triggers a flow along the physical and logical path modeled on
the VNEs. This is done in order to correlate to the actual root cause of this fault. If the flow passes over
a cloud along the path flow, it marks it as a potential root cause for the fault. If there is no other root
cause found on the managed devices, then the cloud becomes the root cause. A ticket is then issued and
the original event correlates to it.
Table 5-1 Cloud Types Supported
Technology Type Supported When... Logical Inventory Physical Inventory
ATM An ATM cloud (representing
unmanaged network segments)
comprised of ATM switches is
connected to routers (managed
segments) with ATM interfaces.
The ATM interface or
sub-interface in the router is IP
over an ATM VC encapsulation
interface with a VC (VPI or VCI)
or VP (VPI) configuration.
The IP interface connected to a
routing entity or VRF
component, for the ATM
interface or sub-interface.
The ATM port connected to the
VC encapsulation, for the ATM
interface or sub-interface.
Frame Relay A Frame Relay cloud
(representing unmanaged
network segments) comprised of
Frame Relay switches is
connected to routers (managed
segments) with Frame Relay
interfaces. The Frame Relay
interface or sub-interface in the
router is IP over a Frame Relay
VC encapsulation interface with
a DLCI configuration.
The IP interface connected to a
routing entity or VRF
component, for the Frame Relay
interface or sub-interface.
The Frame Relay port connected
to the VC encapsulation, for the
Frame Relay interface or
sub-interface.
Ethernet A Ethernet LAN cloud
(representing unmanaged
network segments) comprised of
Ethernet LAN switches is
connected to routers (managed
segments) with Ethernet
interfaces. The ethernet interface
or sub-interface in the router can
be either native or VLAN
interfaces.
The IP interface connected to a
routing entity or bridges, for the
ethernet interface or
sub-interface.
The ethernet port connected to
the VLAN encapsulation, for the
ethernet interface or
sub-interface.