Users Guide

Determine the UP/DOWN state of a tracked route by the threshold for the current value of the route
metric in the routing table. To provide a common tracking interface for different clients, route metrics are
scaled in the range 0 to 255, where 0 is connected and 255 is inaccessible. The scaled metric value
communicated to a client always considers a lower value to have priority over a higher value.
The resulting scaled value is compared against the configured threshold values to determine the state of
a tracked route as follows:
● If the scaled metric for a route entry is less than or equal to the UP threshold, the state of a route is
UP.
● If the scaled metric for a route is greater than or equal to the DOWN threshold or the route is not
entered in the routing table, the state of a route is DOWN.
Configure the UP and DOWN thresholds for each tracked route with the threshold metric
command. The default UP threshold is 254; the default DOWN threshold is 255. The notification of a
change in the state of a tracked object is sent when a metric value crosses a configured threshold.
The tracking process uses a protocol-specific resolution value to convert the actual metric in the routing
table to a scaled metric in the range 0 to 255. You can configure the resolution value used to scale route
metrics for supported protocols with the track resolution ip route and track resolution
ipv6 route commands.
Related
Commands
● track ip route metric threshold – configure object tracking on the threshold of an IPv4 route metric.
● track resolution ip route – configure the protocol-specific resolution value used to scale an IPv4 route
metric.
track interface ip routing
Configure object tracking on the routing status of an IPv4 Layer 3 interface.
Syntax
track object-id interface interface ip routing
To return to the default setting, use the no track object-id command.
Parameters
object-id Enter the ID number of the tracked object. The range is 1 to 500.
interface Enter one of the following values:
● For a 10-Gigabit Ethernet interface, enter the keyword
TenGigabitEthernet then the stack/slot/port/subport information.
● For a 25-Gigabit Ethernet interface, enter the keyword twentyFiveGigE
then the stack/slot/port/subport information.
● For a 40-Gigabit Ethernet interface, enter the keyword fortyGigE then the
stack/slot/port[/subport] information.
● For a 50-Gigabit Ethernet interface, enter the keyword fiftyGigE then the
stack/slot/port/subport information.
● For a 100-Gigabit Ethernet interface, enter the keyword hundredGigE then
the stack/slot/port information.
● For a Loopback interface, enter the keyword loopback then a number from 0
to 16383.
● For a port channel interface, enter the keywords port-channel then a
number.
● For a tunnel interface, enter the keyword tunnel.
● For a VLAN interface, enter the keyword vlan then a number from 1 to 4094.
Defaults None
Command Modes CONFIGURATION
Command
History
This guide is platform-specific. For command information about other platforms, see the relevant Dell
Networking OS Command Line Reference Guide.
878 Object Tracking