--- 1/draft-ietf-idr-bgp-ls-sbfd-extensions-00.txt 2019-11-01 12:13:31.546450398 -0700 +++ 2/draft-ietf-idr-bgp-ls-sbfd-extensions-01.txt 2019-11-01 12:13:31.566450905 -0700 @@ -1,26 +1,26 @@ Inter-Domain Routing Z. Li Internet-Draft S. Zhuang Intended status: Standards Track Huawei -Expires: December 1, 2019 K. Talaulikar +Expires: May 4, 2020 K. Talaulikar Cisco Systems S. Aldrin Google, Inc J. Tantsura Apstra G. Mirsky ZTE Corp. - May 30, 2019 + November 1, 2019 BGP Link-State Extensions for Seamless BFD - draft-ietf-idr-bgp-ls-sbfd-extensions-00 + draft-ietf-idr-bgp-ls-sbfd-extensions-01 Abstract Seamless Bidirectional Forwarding Detection (S-BFD) defines a simplified mechanism to use Bidirectional Forwarding Detection (BFD) with large portions of negotiation aspects eliminated, thus providing benefits such as quick provisioning as well as improved control and flexibility to network nodes initiating the path monitoring. The link-state routing protocols (IS-IS and OSPF) have been extended to advertise the Seamless BFD (S-BFD) Discriminators. @@ -44,21 +44,21 @@ 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 December 1, 2019. + This Internet-Draft will expire on May 4, 2020. Copyright Notice Copyright (c) 2019 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 @@ -75,21 +75,21 @@ 3. Problem and Requirement . . . . . . . . . . . . . . . . . . . 3 4. BGP-LS Extensions for S-BFD Discriminator . . . . . . . . . . 4 5. IANA Considerations . . . . . . . . . . . . . . . . . . . . . 6 6. Manageability Considerations . . . . . . . . . . . . . . . . 6 6.1. Operational Considerations . . . . . . . . . . . . . . . 6 6.2. Management Considerations . . . . . . . . . . . . . . . . 6 7. Security Considerations . . . . . . . . . . . . . . . . . . . 6 8. Acknowledgements . . . . . . . . . . . . . . . . . . . . . . 7 9. References . . . . . . . . . . . . . . . . . . . . . . . . . 7 9.1. Normative References . . . . . . . . . . . . . . . . . . 7 - 9.2. Informative References . . . . . . . . . . . . . . . . . 7 + 9.2. Informative References . . . . . . . . . . . . . . . . . 8 Authors' Addresses . . . . . . . . . . . . . . . . . . . . . . . 8 1. Introduction Seamless Bidirectional Forwarding Detection (S-BFD) [RFC7880] defines a simplified mechanism to use Bidirectional Forwarding Detection (BFD) [RFC5880] with large portions of negotiation aspects eliminated, thus providing benefits such as quick provisioning as well as improved control and flexibility to network nodes initiating the path monitoring. @@ -186,21 +186,21 @@ +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | ... | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | Discriminator n (Optional) | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ Figure 1: S-BFD Discriminators TLV where: - o Type: TBD (see IANA Considerations Section 5) + o Type: 1032 o Length: variable. Minimum of 8 octets and increments of 4 octets there on for each additional discriminator o Discriminators : multiples of 4 octets, each carrying a S-BFD local discriminator value of the node. At least one discriminator MUST be included in the TLV. The S-BFD Discriminators TLV can only be added to the BGP-LS Attribute associated with the Node NLRI that originates the @@ -216,27 +216,28 @@ When the node is not running any of the IGPs but running a protocol like BGP, then the locally provisioned S-BFD discriminators of the node MAY be originated as part of the BGP-LS attribute within the Node NLRI corresponding to the local node. 5. IANA Considerations This document requests assigning code-points from the registry "BGP- LS Node Descriptor, Link Descriptor, Prefix Descriptor, and Attribute - TLVs" based on table below. The column "IS-IS TLV/Sub-TLV" defined - in the registry does not require any value and should be left empty. + TLVs" based on table below which reflects the values assigned via the + early allocation process. The column "IS-IS TLV/Sub-TLV" defined in + the registry does not require any value and should be left empty. +---------------+--------------------------+----------+ | Code Point | Description | Length | +---------------+--------------------------+----------+ - | TBD | S-BFD Discriminators TLV | variable | + | 1032 | S-BFD Discriminators TLV | variable | +---------------+--------------------------+----------+ 6. Manageability Considerations This section is structured as recommended in [RFC5706]. The new protocol extensions introduced in this document augment the existing IGP topology information that was distributed via [RFC7752]. Procedures and protocol extensions defined in this document do not affect the BGP protocol operations and management other than as @@ -310,24 +311,24 @@ May 2017, . 9.2. Informative References [I-D.ietf-mpls-seamless-mpls] Leymann, N., Decraene, B., Filsfils, C., Konstantynowicz, M., and D. Steinberg, "Seamless MPLS Architecture", draft- ietf-mpls-seamless-mpls-07 (work in progress), June 2014. [I-D.ietf-spring-segment-routing-policy] - Filsfils, C., Sivabalan, S., daniel.voyer@bell.ca, d., - bogdanov@google.com, b., and P. Mattes, "Segment Routing - Policy Architecture", draft-ietf-spring-segment-routing- - policy-03 (work in progress), May 2019. + Filsfils, C., Sivabalan, S., Voyer, D., Bogdanov, A., and + P. Mattes, "Segment Routing Policy Architecture", draft- + ietf-spring-segment-routing-policy-03 (work in progress), + May 2019. [RFC5706] Harrington, D., "Guidelines for Considering Operations and Management of New Protocols and Protocol Extensions", RFC 5706, DOI 10.17487/RFC5706, November 2009, . [RFC5880] Katz, D. and D. Ward, "Bidirectional Forwarding Detection (BFD)", RFC 5880, DOI 10.17487/RFC5880, June 2010, .