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Dell Configuration Guide for the S4048–ON System 9.14.2.6

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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.

A tracked route matches a route in the routing table only if the exact address and prefix length match an entry in the routing table. For example, when configured as a tracked route, 10.0.0.0/24 does not match the routing table entry 10.0.0.0/8. If no route-table entry has the exact address and prefix length, the tracked route is considered to be DOWN.

In addition to the entry of a route in the routing table, you can configure how the status of a route is tracked in either the following ways:
  • By the reachability of the route's next-hop router.
  • By comparing the UP or DOWN threshold for a route’s metric with current entries in the route table.

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