OSPF-TE Link Availability Extension for Links with Variable Discrete Bandwidth

The information below is for an old version of the document
Document Type None Internet-Draft (ccamp WG)
Last updated 2016-11-03 (latest revision 2016-10-23)
Replaces draft-long-ccamp-ospf-availability-extension
Stream IETF
Intended RFC status Proposed Standard
Expired & archived
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Stream WG state (None)
Document shepherd Fatai Zhang
Shepherd write-up Show (last changed 2016-08-25)
IESG IESG state Unknown state
Consensus Boilerplate Yes
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Responsible AD Deborah Brungard
Send notices to "Fatai Zhang" <zhangfatai@huawei.com>

This Internet-Draft is no longer active. A copy of the expired Internet-Draft can be found at


A network may contain links with variable discrete bandwidth, e.g., copper, radio, etc. The bandwidth of such links may change discretely in reaction to changing external environment. Availability is typically used for describing such links during network planning. This document introduces an optional Interface Switching Capability Descriptor (ISCD) Availability sub-TLV to extend the Generalized Multi-Protocol Label Switching (GMPLS) Open Shortest Path First (OSPF) routing protocol. This extension can be used for route computation in a network that contains links with variable discrete bandwidth. Note, this document only covers the mechanisms by which the availability information is distributed. The mechanisms by which availability information of a link is determined and the use of the distributed information for route computation are outside the scope of this document. It is intended that technology- specific documents will reference this document to describe specific uses.


Hao Long (longhao@huawei.com)
Min Ye (amy.yemin@huawei.com)
Gregory Mirsky (gregimirsky@gmail.com)
Alessandro D'Alessandro (alessandro.dalessandro@telecomitalia.it)
Himanshu Shah (hshah@ciena.com)

(Note: The e-mail addresses provided for the authors of this Internet-Draft may no longer be valid.)