Dell S4048-ON, Configuration Manual

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Figure 100. Object Tracking Example
When you configure a tracked object, such as an IPv4/IPv6 a route or interface, you specify an object number 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 client.
Track Layer 2 Interfaces
You can create an object to track the line-protocol state of a Layer 2 interface. In this type of object tracking, 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 the link-level status goes up, the
tracked resource status is considered to be UP. For logical interfaces, such as port-channels or virtual local area networks (VLANs),
the link-protocol status is considered to be UP if any physical interface under the logical interface is UP.
Track Layer 3 Interfaces
You can create an object that tracks the Layer 3 state (IPv4 or IPv6 routing status) of an interface.
• The Layer 3 status of an interface is UP only if the Layer 2 status of the interface is UP and the interface has a valid IP address.
• The Layer 3 status of an interface goes DOWN when its Layer 2 status goes down or the IP address is removed from the routing
table.
Track IPv4 and IPv6 Routes
You can create an object that tracks an IPv4 or IPv6 route entry in the routing table.
Specify a tracked route by its IPv4 or IPv6 address and prefix-length. Optionally specify a tracked route by a virtual routing and
forwarding (VRF) instance name if the route to be tracked is part of a VRF. The next-hop address is not part of the definition of the
tracked object.
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Object Tracking