Editing Open Shortest Path First (section)

===Traffic engineering===
OSPF-TE is an extension to OSPF extending the expressivity to allow for traffic engineering and use on non-IP networks.<ref>{{cite IETF
  | last = Katz
  | first = D
  | author2 = D. Yeung
  | title = Traffic Engineering (TE) Extensions to OSPF Version 2
  | publisher = The Internet Society
  | date = September 2003
  | url = http://datatracker.ietf.org/doc/rfc3630/
  | id = OSPF-TEextensions
  | rfc = 3630
  | access-date = 2007-09-28
  }} {{Webarchive|url=https://web.archive.org/web/20120214103941/http://datatracker.ietf.org/doc/rfc3630/ |date=February 14, 2012 }}</ref> Using OSPF-TE, more information about the topology can be exchanged using opaque LSA carrying [[type–length–value]] elements. These extensions allow OSPF-TE to run completely out of band of the data plane network. This means that it can also be used on non-IP networks, such as optical networks.

OSPF-TE is used in [[GMPLS]] networks as a means to describe the topology over which GMPLS paths can be established. GMPLS uses its own path setup and forwarding protocols, once it has the full network map.

In the [[Resource Reservation Protocol]] (RSVP), OSPF-TE is used for recording and flooding RSVP signaled bandwidth reservations for [[label-switched path]]s within the link-state database.