OSPF Topology-Transparent Zone
RFC 8099
| Document | Type |
RFC - Experimental
(February 2017; No errata)
Was draft-ietf-ospf-ttz (ospf WG)
|
|
|---|---|---|---|
| Last updated | 2017-02-28 | ||
| Replaces | draft-chen-ospf-ttz | ||
| Stream | IETF | ||
| Formats | plain text 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 . . . . . . . . . . . . . . . . . . . . 19
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