Hi,
according to the command reference you need at least 12.3(4)T:
track rtr
To track the state of a Service Assurance Agent (SAA) operation and to enter tracking configuration mode, use the track rtr command in global configuration mode. To remove the tracking, use the no form of this command.
track object-number rtr saa-id {state | reachability}
no track object-number rtr saa-id {state | reachability}
Syntax Description
object-number
Object number representing the object to be tracked. The range is from 1 to 500.
saa-id
Service Assurance Agent router ID number.
state
Tracks operation return code.
reachability
Tracks whether the route is reachable.
Defaults
SAA tracking is disabled.
Command Modes
Global configuration
Command HistoryRelease Modification
12.3(4)T
This command was introduced.
12.2(25)S
This command was integrated into Cisco IOS Release 12.2(25)S.
http://www.cisco.com/en/US/products/sw/iosswrel/ps5207/products_command_reference_chapter09186a0080238b77.html#wp1109164
Hope this helps! Please use the rating system.
Regards, Martin