--- 1/draft-ietf-isis-segment-routing-msd-12.txt 2018-07-24 16:13:37.648523309 -0700 +++ 2/draft-ietf-isis-segment-routing-msd-13.txt 2018-07-24 16:13:37.672523891 -0700 @@ -1,23 +1,23 @@ IS-IS Working Group J. Tantsura Internet-Draft Nuage Networks Intended status: Standards Track U. Chunduri -Expires: November 17, 2018 Huawei Technologies +Expires: January 25, 2019 Huawei Technologies S. Aldrin Google, Inc L. Ginsberg Cisco Systems - May 16, 2018 + July 24, 2018 Signaling MSD (Maximum SID Depth) using IS-IS - draft-ietf-isis-segment-routing-msd-12 + draft-ietf-isis-segment-routing-msd-13 Abstract This document defines a way for an IS-IS Router to advertise multiple types of supported Maximum SID Depths (MSDs) at node and/or link granularity. Such advertisements allow entities (e.g., centralized controllers) to determine whether a particular SID stack can be supported in a given network. This document only defines one type of MSD maximum label imposition, but defines an encoding that can support other MSD types. @@ -30,21 +30,21 @@ 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 https://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 November 17, 2018. + This Internet-Draft will expire on January 25, 2019. Copyright Notice Copyright (c) 2018 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 (https://trustee.ietf.org/license-info) in effect on the date of publication of this document. Please review these documents @@ -169,21 +169,21 @@ Figure 1: Node MSD Sub-TLV Type: 23 (allocated by IANA via the early assignment process) Length: variable (minimum of 2, multiple of 2 octets) and represents the total length of value field. Value: field consists of one or more pairs of a 1 octet MSD-Type and 1 octet MSD-Value. - MSD-Type is one of the values defined in the MSD Types registry + MSD-Type is one of the values defined in the IGP MSD Types registry created by the IANA Section of this document. MSD-Value is a number in the range of 0-255. For all MSD-Types, 0 represents lack of the ability to support SID stack of any depth; any other value represents that of the node. This value MUST represent the lowest value supported by any link configured for use by the advertising IS-IS instance. This sub-TLV is optional. The scope of the advertisement is specific to the deployment. @@ -297,22 +297,22 @@ TLV 22 23 25 141 222 223 --- -------------------- y y y y y y Figure 5: TLVs where LINK MSD Sub-TLV can be present This document requests creation of an IANA managed registry under a new category of "Interior Gateway Protocol (IGP) Parameters" IANA registries to identify MSD types as proposed in Section 2 and Section 3. The registration procedure is "Expert Review" as defined - in [RFC8126]. Suggested registry name is "MSD types". Types are an - unsigned 8 bit number. The following values are defined by this + in [RFC8126]. Suggested registry name is "IGP MSD Types". Types are + an unsigned 8 bit number. The following values are defined by this document Value Name Reference ----- --------------------- ------------- 0 Reserved This document 1 Base MPLS Imposition MSD This document 2-250 Unassigned This document 251-254 Experimental This document 255 Reserved This document @@ -371,22 +371,22 @@ [I-D.ietf-isis-mpls-elc] Xu, X., Kini, S., Sivabalan, S., Filsfils, C., and S. Litkowski, "Signaling Entropy Label Capability and Readable Label-stack Depth Using IS-IS", draft-ietf-isis- mpls-elc-03 (work in progress), January 2018. [I-D.ietf-pce-segment-routing] Sivabalan, S., Filsfils, C., Tantsura, J., Henderickx, W., and J. Hardwick, "PCEP Extensions for Segment Routing", - draft-ietf-pce-segment-routing-11 (work in progress), - November 2017. + draft-ietf-pce-segment-routing-12 (work in progress), June + 2018. [RFC7752] Gredler, H., Ed., Medved, J., Previdi, S., Farrel, A., and S. Ray, "North-Bound Distribution of Link-State and Traffic Engineering (TE) Information Using BGP", RFC 7752, DOI 10.17487/RFC7752, March 2016, . [RFC8126] Cotton, M., Leiba, B., and T. Narten, "Guidelines for Writing an IANA Considerations Section in RFCs", BCP 26, RFC 8126, DOI 10.17487/RFC8126, June 2017,