Editing IS-IS (section)

== History ==
The IS-IS protocol was developed by a team of people working at [[Digital Equipment Corporation]] as part of [[DECnet]] Phase V.

The [[Internet Engineering Task Force]] (IETF) published IS-IS in 1990{{Ref RFC|1142}}, but that RFC was later retracted and marked as ''historic''{{Ref RFC|7142}} because it republished a draft rather than a final version of the [[International Organization for Standardization]] (ISO) standard, causing confusion.

The protocol was standardized by ISO in 1992 as ISO 10589, for communication between network devices that are termed Intermediate Systems (as opposed to end systems or hosts) by the ISO. The purpose of IS-IS was to make the routing of datagrams possible using the ISO-developed [[Open Systems Interconnection|OSI]] [[protocol stack]] called [[Connectionless-mode Network Service]] (CLNS).
IS-IS was developed at roughly the same time that the Internet Engineering Task Force [[IETF]] was developing a similar protocol called [[OSPF]]. IS-IS was later extended to support routing of ''datagrams'' in the [[Internet Protocol]] (IP), the [[network-layer protocol]] of the global Internet. This version of the IS-IS ''routing'' protocol was then called ''Integrated IS-IS''.{{Ref RFC|1195}}