Reference Guide

Object tracking monitors the status of tracked objects and communicates any changes made to interested client applications.
OTM client applications are VRRP and PBR. Each tracked object has a unique identifying number that clients use to configure
the action to take when a tracked object changes state. You can also optionally specify a time delay before changes in a tracked
object's state are reported to a client application.
VRRP can subscribe to a track object which tracks the interface line protocol state. It can use the tracked object status to
determine the priority of the VRRP router in a VRRP group. If a tracked state, or interface goes down, VRRP updates the
priority based on what you configure the new priority to be for the tracked state. When the tracked state comes up, VRRP
restores the original priority for the virtual router group.
Figure 4. Object tracking
Interface tracking
You can create an object that tracks the line-protocol state of a Layer 2 interface, and monitors its operational status (Up or
Down). You can configure up to 500 objects. Each object is assigned a unique ID. The no version of this command deletes the
tracked object from an interface.
When the link-level status goes down, the tracked resource status is also considered Down. If the link-level status goes up,
the tracked resource status is also considered Up. For logical interfaces (port-channels or VLANs), the link-protocol status is
considered to be Up if any physical interface under the logical interface is Up.
The list of available interfaces include:
● ethernet — Physical interface
● port-channel — Port-channel identifier
Layer 3
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