CCNP Route - track 2 ip sla 11 state | reachability ?

Node Man

Hi Everyone,
The Route study guide specifies the command:

track object-number ip sla sla-ops-number [state|rechability]

My problem is that i can not find a single IOS that supports this command. Can anyone suggest a IOS that supports this? I am worried I will buy yet another router that doesn't support it.

Thanks!

joetest

From FLG:
Note
Effective with Cisco IOS Release 12.4(20)T, 12.2(33)SXI1, 12.2(33)SRE and Cisco IOS XE Release 2.4, the track rtr command is replaced by the track ip sla command.