Track Route Reachability - Dell C9000 Series Networking Configuration Manual

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5 (Optional) Configure the metric threshold for the UP and/or DOWN routing status to be tracked for the
specified route.
OBJECT TRACKING mode
threshold metric {[up number] [down number]}
The default UP threshold is 254. The routing state is UP if the scaled route metric is less than or equal to
the UP threshold.
The defult DOWN threshold is 255. The routing state is DOWN if the scaled route metric is greater than
or equal to the DOWN threshold.
6 (Optional) Display the tracking configuration.
EXEC Privilege mode
show track object-id
Example of IPv4 and IPv 6 Tracking Metric Thresholds
The following example configures object tracking on the metric threshold of an IPv4 route.
Dell(conf)#track 6 ip route 2.1.1.0/24 metric threshold
Dell(conf-track-6)#delay down 20
Dell(conf-track-6)#delay up 20
Dell(conf-track-6)#description track ip route metric
Dell(conf-track-6)#threshold metric down 40
Dell(conf-track-6)#threshold metric up 40
Dell(conf-track-6)#exit
Dell(conf)#track 10 ip route 3.1.1.0/24 metric threshold
vrf vrf1
The following example configures object tracking on the metric threshold of an IPv6 route.
Dell(conf)#track 8 ipv6 route 2::/64 metric threshold
Dell(conf-track-8)#threshold metric up 30
Dell(conf-track-8)#threshold metric down 40

Track Route Reachability

If you configure the reachability of an IP route entry as a tracked object, the UP/DOWN state of the route is
determined by the entry of the next-hop address in the ARP cache.
A tracked route is considered to be reachable if there is an address resolution protocol (ARP) cache entry for
the route's next-hop address. If the next-hop address in the ARP cache ages out for a route tracked for its
reachability, an attempt is made to regenerate the ARP cache entry to see if the next-hop address appears
before considering the route DOWN.
Object Tracking 733