Table Of Contents

Local Switching

Technology Description

Local Switching

Inventory and Information Model Objects (IMOs)

Local Switching Entity

Local Switching Entry

Vendor-Specific Inventory and Information Model Objects

Network Topology

Service Events

Local Switching

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This chapter describes the level of support that Cisco ANA provides for Local Switching, as follows:

•Technology Description

•Inventory and Information Model Objects (IMOs)

•Vendor-Specific Inventory and Information Model Objects

•Network Topology

•Service Events

Technology Description

Local Switching

Local switching allows switching of Layer 2 data between two attachment circuits on the same device. Local switching operates in several modes and technologies.

In local switching (also known as "hairpin connection"), frames from one attachment circuit are switched to another attachment circuit on the same router. The attachment interfaces can be on the same line card or on two different cards. During these kinds of switching, no address information is used at all; it is merely a "tube" between the two interfaces.

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Note ANA 3.6 SP4 and later provides support for local switching only in Ethernet and VLAN modes on CRS-1 devices running IOS-XR.

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Inventory and Information Model Objects (IMOs)

This section describes the following IMOs:

•Local Switching Entity

•Local Switching Entry

Local Switching Entity

The Local Switching Entity is the container for Local Switching Entry objects.

Table 18-1 Local Switching Entity Interface (ILocalSwitchingEntity)

Attribute Name	Attribute Description	Scheme1	Polling Interval
Local Switching Table	A set of ILocalSwitchingEntry objects	IPCore	Configuration

1 Supported for IOS-XR devices in IPCore scheme only.

Local Switching Entry

Each Local Switching Entry describes a single locally switched cross-connect entry.

Table 18-2 Local Switching Entry Interface (ILocalSwitchingEntry)

Attribute name	Attribute Description	Scheme1	Polling Interval
Local Switching Group	Name of the cross-connect group	IPCore	Configuration
Local Switching Name	Name of the cross-connect	IPCore	Configuration
Local Switching Status	Status of the cross-connect	IPCore	Configuration
Segment 1 Oid	OID of first cross-connect endpoint	IPCore	Configuration
Segment 1 Status	Status of first cross-connect endpoint	IPCore	Configuration
Segment 2 Oid	OID of second cross-connect endpoint	IPCore	Configuration
Segment 2 Status	Status of second cross-connect endpoint	IPCore	Configuration

1 Supported for IOS-XR devices in IPCore scheme only.

Vendor-Specific Inventory and Information Model Objects

There are no vendor-specific inventory or IMOs for local switching. Currently, only the Cisco CRS-1 device running IOS-XR is supported.

Network Topology

There is no network topology to be discovered specifically for local switching. Local switching is viewable from the Cisco ANA logical inventory through an appropriate cross-connect container. This modeling enables flow functions to operate according to the cross-connect, permitting correlation and path-tracing.

Service Events

The following alarms are supported for this technology:

•Local Switching Entry down

•Local Switching Entry unresolved

•Local Switching Entry up

Both the "Local Switching Entry down" and "Local Switching Entry unresolved" alarms are cleared by the "Local Switching Entry up" alarm.

For detailed information about alarms and correlation, see the Cisco Active Network Abstraction 3.6.5 User Guide.