waht's up with RFC 3101 vs 1587 OSPF story
"OSPF NSSA feature is described by RFC 3101. In Cisco IOS Release 15.1(2)S and later releases, RFC 3101 replaces RFC 1587. RFC 3101 is backward compatible with RFC 1587. For a detailed list of differences between them, see Appendix F of RFC 3101."
from Cisco Config guide for IOS 15 MT
Problem Appendix F is missing; anyone has better explanation?