Users Guide

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 create an object that tracks the line-protocol state of a Layer 2 interface by monitoring
its operational status (UP or DOWN).
When the link-level status goes down, the tracked object status is considered to be DOWN; if the link-level
status is up, the tracked object status is considered to be UP.
Related Commands
• show track – displays information about tracked objects, including conguration, current state, and
clients which track the object.
• track interface ip routing – congures object tracking on the routing status of an IPv4 Layer 3 interface.
track ip host reachability
Congure object tracking on the reachability of an IPv4 host.
Syntax
track object-id ip host host-ip-address/prefix-len reachability [vrf vrf-
name]
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.
ip-address/ prex-
len
Enter an IPv4 address in dotted decimal format. The valid IPv4 prex lengths are
from /0 to /32.
vrf vrf-name (Optional) You can congure a VPN routing and forwarding (VRF) instance to
specify the virtual routing table to which the tracked route belongs.
Defaults none
Command Modes CONFIGURATION
Command History
Version Description
9.8(0.0P5) Introduced on the S4048-ON.
9.8(0.0P2) Introduced on the S3048-ON.
9.7(0.0) Introduced on the S4820T, S4810, S6000, S5000, Z9000, Z9500, IOA, and MXL.
track ip route metric threshold
Congure object tracking on the threshold of an IPv4 route metric.
Syntax
track object-id ip route ip-address/prefix-len metric threshold [vrf vrf-
name]
To return to the default setting, use the no track object-id command.
1018
Object Tracking