OSPF Topology-Transparent Zone
RFC 8099
Document | Type |
RFC - Experimental
(February 2017; No errata)
Was draft-ietf-ospf-ttz (ospf WG)
|
|
---|---|---|---|
Authors | Huaimo Chen , Richard Li , Alvaro Retana , Yi Yang , Vic Liu | ||
Last updated | 2017-02-28 | ||
Replaces | draft-chen-ospf-ttz | ||
Stream | IETF | ||
Formats | plain text html pdf htmlized bibtex | ||
Reviews | |||
Stream | WG state | Submitted to IESG for Publication | |
Document shepherd | Padma Pillay-Esnault | ||
Shepherd write-up | Show (last changed 2016-03-17) | ||
IESG | IESG state | RFC 8099 (Experimental) | |
Consensus Boilerplate | Yes | ||
Telechat date | |||
Responsible AD | Alia Atlas | ||
Send notices to | "padma.ietf@gmail.com" <padma.ietf@gmail.com> | ||
IANA | IANA review state | Version Changed - Review Needed | |
IANA action state | RFC-Ed-Ack |
Internet Engineering Task Force (IETF) H. Chen Request for Comments: 8099 R. Li Category: Experimental Huawei Technologies ISSN: 2070-1721 A. Retana Cisco Systems, Inc. Y. Yang Sockrate Z. Liu China Mobile February 2017 OSPF Topology-Transparent Zone Abstract This document presents a Topology-Transparent Zone (TTZ) in an OSPF area. A TTZ comprises a group of routers and a number of links connecting these routers. Any router outside of the zone is not aware of the zone. A TTZ hides the internal topology of the TTZ from the outside. It does not directly advertise any internal information about the TTZ to a router outside of the TTZ. The information about the links and routers such as a link down inside the TTZ is not advertised to any router outside of the TTZ. Status of This Memo This document is not an Internet Standards Track specification; it is published for examination, experimental implementation, and evaluation. This document defines an Experimental Protocol for the Internet community. This document is a product of the Internet Engineering Task Force (IETF). It represents the consensus of the IETF community. It has received public review and has been approved for publication by the Internet Engineering Steering Group (IESG). Not all documents approved by the IESG are a candidate for any level of Internet Standard; see Section 2 of RFC 7841. Information about the current status of this document, any errata, and how to provide feedback on it may be obtained at http://www.rfc-editor.org/info/rfc8099. Chen, et al. Experimental [Page 1] RFC 8099 Topology-Transparent Zone February 2017 Copyright Notice Copyright (c) 2017 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 carefully, as they describe your rights and restrictions with respect to this document. Code Components extracted from this document must include Simplified BSD License text as described in Section 4.e of the Trust Legal Provisions and are provided without warranty as described in the Simplified BSD License. Chen, et al. Experimental [Page 2] RFC 8099 Topology-Transparent Zone February 2017 Table of Contents 1. Introduction . . . . . . . . . . . . . . . . . . . . . . . . 4 2. Terminology . . . . . . . . . . . . . . . . . . . . . . . . . 4 3. Conventions Used in This Document . . . . . . . . . . . . . . 5 4. Requirements . . . . . . . . . . . . . . . . . . . . . . . . 5 5. Topology-Transparent Zone . . . . . . . . . . . . . . . . . . 5 5.1. Overview of Topology-Transparent Zone . . . . . . . . . . 5 5.2. TTZ Example . . . . . . . . . . . . . . . . . . . . . . . 6 6. Extensions to OSPF Protocols . . . . . . . . . . . . . . . . 8 6.1. General Format of TTZ LSA . . . . . . . . . . . . . . . . 8 6.2. TTZ ID TLV . . . . . . . . . . . . . . . . . . . . . . . 9 6.3. TTZ Router TLV . . . . . . . . . . . . . . . . . . . . . 9 6.4. TTZ Options TLV . . . . . . . . . . . . . . . . . . . . . 10 6.5. Link Scope TTZ LSA . . . . . . . . . . . . . . . . . . . 12 7. Constructing LSAs for TTZ . . . . . . . . . . . . . . . . . . 12 7.1. TTZ Migration Process . . . . . . . . . . . . . . . . . . 13 8. Establishing Adjacencies . . . . . . . . . . . . . . . . . . 14 8.1. Discovery of TTZ Neighbors . . . . . . . . . . . . . . . 14 8.2. Adjacency between TTZ Edge and TTZ-External Router . . . 17 9. Advertisement of LSAs . . . . . . . . . . . . . . . . . . . . 17 9.1. Advertisement of LSAs within TTZ . . . . . . . . . . . . 17 9.2. Advertisement of LSAs through TTZ . . . . . . . . . . . . 18 10. Computation of Routing Table . . . . . . . . . . . . . . . . 18 11. Operations . . . . . . . . . . . . . . . . . . . . . . . . . 18 11.1. Configuring TTZ . . . . . . . . . . . . . . . . . . . . 18 11.2. Migration to TTZ . . . . . . . . . . . . . . . . . . . . 19Show full document text