You can use the Feature Navigator to determine which IOS version would alllow you to run any specific feature on a given platform. Please use the following link, select search by feature and use "IS-IS" as the feature name.
http://tools.cisco.com/ITDIT/CFN/jsp/index.jsp
Hope this helps,
Harold Ritter
Sr Technical Leader
CCIE 4168 (R&S, SP)
harold@cisco.com
México móvil: +52 1 55 8312 4915
Cisco México
Paseo de la Reforma 222
Piso 19
Cuauhtémoc, Juárez
Ciudad de México, 06600
México