Service Manual

● 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
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 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 configuration, current state, and
clients which track the object.
● track interface ip routing – configures object tracking on the routing status of an IPv4 Layer 3
interface.
track ip host reachability
Configure 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/
prefix-len
Enter an IPv4 address in dotted decimal format. The valid IPv4 prefix lengths are
from /0 to /32.
vrf vrf-name (Optional) You can configure 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.
Object Tracking 981