--- 1/draft-ietf-ccamp-flexi-grid-fwk-06.txt 2015-08-31 00:15:00.997901179 -0700 +++ 2/draft-ietf-ccamp-flexi-grid-fwk-07.txt 2015-08-31 00:15:01.073902968 -0700 @@ -1,20 +1,20 @@ CCAMP Working Group O. Gonzalez de Dios, Ed. Internet-Draft Telefonica I+D Intended status: Informational R. Casellas, Ed. -Expires: February 26, 2016 CTTC - August 25, 2015 +Expires: March 2, 2016 CTTC + August 30, 2015 Framework and Requirements for GMPLS-based control of Flexi-grid DWDM networks - draft-ietf-ccamp-flexi-grid-fwk-06 + draft-ietf-ccamp-flexi-grid-fwk-07 Abstract To allow efficient allocation of optical spectral bandwidth for high bit-rate systems, the International Telecommunication Union Telecommunication Standardization Sector (ITU-T) has extended its Recommendations G.694.1 and G.872 to include a new dense wavelength division multiplexing (DWDM) grid by defining a set of nominal central frequencies, channel spacings and the concept of "frequency slot". In such an environment, a data plane connection is switched @@ -37,21 +37,21 @@ Internet-Drafts are working documents of the Internet Engineering Task Force (IETF). Note that other groups may also distribute working documents as Internet-Drafts. The list of current Internet- Drafts is at http://datatracker.ietf.org/drafts/current/. Internet-Drafts are draft documents valid for a maximum of six months and may be updated, replaced, or obsoleted by other documents at any time. It is inappropriate to use Internet-Drafts as reference material or to cite them other than as "work in progress." - This Internet-Draft will expire on February 26, 2016. + This Internet-Draft will expire on March 2, 2016. Copyright Notice Copyright (c) 2015 IETF Trust and the persons identified as the document authors. All rights reserved. This document is subject to BCP 78 and the IETF Trust's Legal Provisions Relating to IETF Documents (http://trustee.ietf.org/license-info) in effect on the date of publication of this document. Please review these documents @@ -866,29 +866,28 @@ 4.5. Media Layer Resource Allocation Considerations A media channel has an associated effective frequency slot. From the perspective of network control and management, this effective slot is seen as the "usable" end-to-end frequency slot. The establishment of an LSP is related to the establishment of the media channel and the configuration of the effective frequency slot. A "service request" is characterized (at a minimum) by its required - effective frequency slot width. This does not preclude that the - request may add additional constraints such as also imposing the - nominal central frequency. A given effective frequency slot may be - requested for the media channel in the control plane LSP setup - messages, and a specific frequency slot can be requested on any - specific hop of the LSP setup. Regardless of the actual encoding, - the LSP setup message specifies a minimum effective frequency slot - width that needs to be fulfilled in order to successful establish the - requsted LSP. + effective slot width. This does not preclude that the request may + add additional constraints such as also imposing the nominal central + frequency. A given effective frequency slot may be requested for the + media channel in the control plane LSP setup messages, and a specific + frequency slot can be requested on any specific hop of the LSP setup. + Regardless of the actual encoding, the LSP setup message specifies a + minimum effective frequency slot width that needs to be fulfilled in + order to successful establish the requsted LSP. An effective frequency slot must equally be described in terms of a central nominal frequency and its slot width (in terms of usable spectrum of the effective frequency slot). That is, it must be possible to determine the end-to-end values of the n and m parameters. We refer to this by saying that the "effective frequency slot of the media channel/LSP must be valid". In GMPLS the requested effective frequency slot is represented to the TSpec present in the RSVP-TE Path message, and the effective