Table Of Contents
Information About Object Tracking
Licensing Requirements for Object Tracking
Prerequisites for Object Tracking
Configuring Object Tracking for an Interface
Configuring Object Tracking for Route Reachability
Field Descriptions for Object Tracking
Object Tracking: Details Tab: Object Tracking Details Section
Object Tracking: Details Tab: Client Details Section
Configuring Object Tracking
This chapter describes how to configure object tracking on Cisco NX-OS devices.
This chapter includes the following sections:
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Information About Object Tracking
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Information About Object Tracking
Object tracking allows you to track specific objects on the network, such as the interface line protocol state, IP routing, and route reachability, and take action when the tracked object's state changes. This feature allows you to increase the availability of the network and shorten recovery time if an object state goes down.
This section includes the following topics:
Object Tracking Overview
The object tracking feature allows you to create a tracked object that multiple clients can use to modify the client behavior when a tracked object changes. Several clients register their interest with the tracking process, track the same object, and each take different actions when the object state changes.
Clients include the following features:
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The object tracking monitors the status of the tracked objects and communicates any changes made to interested clients. Each tracked object is identified by a unique number that clients can use to configure the action to take when a tracked object changes state.
Cisco NX-OS tracks the following object types:
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For example, you can configure HSRP to track the line protocol of the interface that connects one of the redundant routers to the rest of the network. If that link protocol goes down, you can modify the priority of the affected HSRP router and cause a switchover to a backup router that has better network connectivity
High Availability
Object tracking supports high availability through stateful restarts. A stateful restart occurs when the object tracking process crashes. Object tracking also supports stateful switchover on a dual supervisor system. Cisco NX-OS applies the runtime configuration after the switchover.
You can also use object tracking to modify the behavior of a client to improve overall network availability.
Virtualization Support
Object tracking supports Virtual Routing and Forwarding (VRF) instances. VRFs exist within virtual device contexts (VDCs). By default, Cisco NX-OS places you in the default VDC and default VRF unless you specifically configure another VDC and VRF. By default, Cisco NX-OS tracks the route reachability state of objects in the default VRF. If you want to track objects in another VRF, you must configure the object to be a member of that VRF.
For more information, see the Cisco NX-OS Virtual Device Context Configuration Guide.
Licensing Requirements for Object Tracking
The following table shows the licensing requirements for this feature:
Prerequisites for Object Tracking
Object tracking has the following prerequisites:
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logging event link-status defaultlogging level track 5logging logfile messages 5•
Guidelines and Limitations
Object tracking has the following guidelines and limitations:
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Configuring Object Tracking
You can access object tracking from the Routing feature selection. Figure 5-1 shows how to configure object tracking.
Figure 5-1 Configuring Object Tracking
For more information about the Data Center Network Manager features, see the Cisco Data Center Network Manager Fundamentals Guide
This section includes the following topics:
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Configuring Object Tracking for an Interface
You can configure Cisco NX-OS to track the line protocol or IP routing state of an interface.
BEFORE YOU BEGIN
Ensure that you configure the logging level for object tracking to 5 (Notify) or a higher level. To configure the device with the minimal required logging level, log into the command-line interface of the device and use the following command:
logging event link-status defaultlogging level track 5logging logfile messages 5DETAILED STEPS
To create a tracked object for an interface, follow these steps:
Step 1
The available devices appear in the Summary pane.
Step 2
Step 3
The system highlights the new tracked object row in the Summary pane, and tabs update in the Details pane.
Step 4
Step 5
The Object Tracking Details tab appears.
Step 6
Step 7
Step 8
Step 9
Configuring Object Tracking for Route Reachability
You can configure Cisco NX-OS to track the existence and reachability of an IP route.
BEFORE YOU BEGIN
Ensure that you configure the logging level for object tracking to 5 (Notify) or a higher level. To configure the device with the minimal required logging level, log into the command-line interface of the device and use the following command:
logging event link-status defaultlogging level track 5logging logfile messages 5DETAILED STEPS
To create a tracked object for route reachability, follow these steps:
Step 1
The available devices appear in the Summary pane.
Step 2
Step 3
The system highlights the new tracked object row in the Summary pane, and tabs update in the Details pane.
Step 4
Step 5
The Object Tracking Details tab appears.
Step 6
Step 7
The format is A.B.C.D/length.
Step 8
The default is the default VRF.
Step 9
Viewing Client Details
You can view the clients that are using a tracked object.
DETAILED STEPS
To view client details for a tracked object, follow these steps:
Step 1
The available devices appear in the Summary pane.
Step 2
Step 3
The system highlights the tracked object row in the Summary pane, and tabs update in the Details pane.
Step 4
The Object Tracking Details tab appears.
Step 5
The client details appear.
Related Topics
See the following topics for information related to object tracking:
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Field Descriptions for Object Tracking
This section includes the following field descriptions for Object Tracking:
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Object Tracking: Details Tab: Object Tracking Details Section
Object Tracking: Details Tab: Client Details Section
Additional References
For additional information related to implementing object tracking, see the following sections:
Related Documents
Standards
No new or modified standards are supported by this feature, and support for existing standards has not been modified by this feature.
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