Administrator Guide

down number Enter a number for the DOWN threshold to be applied to the scaled metric of an
IPv4 or IPv6 route. The default DOWN threshold is255. The routing state is DOWN
if the scaled route metric is greater than or equal to the DOWN threshold.
Defaults none
Command Modes OBJECT TRACKING (conf_track_object-id)
Command
History
Version Description
9.7(0.0) Introduced on the S6000-ON.
8.3.12.0 Introduced on the S4810.
8.4.1.0 Introduced.
Usage
Information
Use this command to configure the UP and/or DOWN threshold for the scaled metric of a tracked IPv4 or
IPv6 route.
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 – configures object tracking on the threshold of an IPv4 route metric.
● track resolution ip route – configures 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 slot/port information.
● For a 40-Gigabit Ethernet interface, enter the keyword fortyGigE then the
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 VLAN interface, enter the keyword vlan then a number from 1 to 4094.
Object Tracking 835