678 | Object Trackingw w w . d e l l . c o m | s u p p o r t . d e l l . c o m You can create a tracked object to monitor the metric of the default route 0.0.0.0/0. After you configure thedefault route as a tracked object, you can configure the VRRP group to track the state of the route. In thisway, the VRRP priority of the router with the better metric as determined by OSPF automatically becomesmaster of the VRRP group. Later, if network conditions change and the cost of the default route in eachrouter changes, the mastership of the VRRP group is automatically reassigned to the router with the bettermetric.Figure 31-1. Object Tracking ExampleWhen you configure a tracked object, such as an IPv4/IPv6 a route or interface, you specify an objectnumber to identify the object. Optionally, you can also specify:• UP and DOWN thresholds used to report changes in a route metric• A time delay before changes in a tracked object’s state are reported to a clientTracking Layer 2 InterfacesYou can create an object to track the line-protocol state of a Layer 2 interface. In this type of objecttracking, the link-level operational status (UP or DOWN) of the interface is monitored.When the link-level status goes down, the tracked resource status is considered to be DOWN; if thelink-level status goes up, the tracked resource status is considered to be UP. For logical interfaces, such asport-channels or VLANs, the link-protocol status is considered to be UP if any physical interface under thelogical interface is UP.
