--- 1/draft-ietf-isis-segment-routing-extensions-24.txt 2019-05-19 21:13:14.151169285 -0700 +++ 2/draft-ietf-isis-segment-routing-extensions-25.txt 2019-05-19 21:13:14.211170798 -0700 @@ -1,26 +1,26 @@ IS-IS for IP Internets S. Previdi, Ed. Internet-Draft Huawei Intended status: Standards Track L. Ginsberg, Ed. -Expires: October 19, 2019 C. Filsfils +Expires: November 20, 2019 C. Filsfils Cisco Systems, Inc. A. Bashandy Arrcus H. Gredler RtBrick Inc. B. Decraene Orange - April 17, 2019 + May 19, 2019 IS-IS Extensions for Segment Routing - draft-ietf-isis-segment-routing-extensions-24 + draft-ietf-isis-segment-routing-extensions-25 Abstract Segment Routing (SR) allows for a flexible definition of end-to-end paths within IGP topologies by encoding paths as sequences of topological sub-paths, called "segments". These segments are advertised by the link-state routing protocols (IS-IS and OSPF). This draft describes the necessary IS-IS extensions that need to be introduced for Segment Routing operating on an MPLS data-plane. @@ -41,21 +41,21 @@ 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 October 19, 2019. + This Internet-Draft will expire on November 20, 2019. 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 @@ -599,21 +599,22 @@ +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ Figure 1: SID/Label Binding TLV format o Type: 149 o Length: variable. o 1 octet of flags - o 1 octet of RESERVED + o 1 octet of RESERVED (SHOULD be transmitted as 0 and MUST be + ignored on receipt) o 2 octets of Range o 1 octet of Prefix Length o 0-16 octets of Prefix o sub-TLVs, where each sub-TLV consists of a sequence of: * 1 octet of sub-TLV type @@ -789,32 +790,32 @@ | 1 | 1 |Prefix-SID Type| sub-TLV Length| +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | Flags | Algorithm | | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | 51 | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ Example-3: If the following IPv6 prefixes need to be mapped into the corresponding Prefix-SID indexes: - 2001:DB8:1/48, Prefix-SID: Index 151 - 2001:DB8:2/48, Prefix-SID: Index 152 - 2001:DB8:3/48, Prefix-SID: Index 153 - 2001:DB8:4/48, Prefix-SID: Index 154 + 2001:db8:1/48, Prefix-SID: Index 151 + 2001:db8:2/48, Prefix-SID: Index 152 + 2001:db8:3/48, Prefix-SID: Index 153 + 2001:db8:4/48, Prefix-SID: Index 154 0 1 2 3 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | Type | Length |1|0|0|0|0| | RESERVED | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | Range = 4 | 48 | 0x20 | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ - | 0x01 | 0x0D | 0xB8 | 0x00 | + | 0x01 | 0x0d | 0xb8 | 0x00 | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | 0x01 |Prefix-SID Type| sub-TLV Length| Flags | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | Algorithm | 0 | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | 151 | +-+-+-+-+-+-+-+-+ It is not expected that a network operator will be able to keep fully continuous Prefix / SID/Index mappings. In order to support @@ -1310,22 +1311,22 @@ [I-D.ietf-spring-segment-routing-ldp-interop] Bashandy, A., Filsfils, C., Previdi, S., Decraene, B., and S. Litkowski, "Segment Routing interworking with LDP", draft-ietf-spring-segment-routing-ldp-interop-15 (work in progress), September 2018. [I-D.ietf-spring-segment-routing-mpls] Bashandy, A., Filsfils, C., Previdi, S., Decraene, B., Litkowski, S., and R. Shakir, "Segment Routing with MPLS - data plane", draft-ietf-spring-segment-routing-mpls-21 - (work in progress), April 2019. + data plane", draft-ietf-spring-segment-routing-mpls-22 + (work in progress), May 2019. [ISO10589] International Organization for Standardization, "Intermediate system to Intermediate system intra-domain routeing information exchange protocol for use in conjunction with the protocol for providing the connectionless-mode Network Service (ISO 8473)", ISO/ IEC 10589:2002, Second Edition, Nov 2002. [RFC2119] Bradner, S., "Key words for use in RFCs to Indicate