Topology-Transparent Zone
draft-chen-isis-ttz-09
|
| Document |
Type |
|
Active Internet-Draft (individual)
|
|
Last updated |
|
2020-06-15
|
|
Stream |
|
(None)
|
|
Intended RFC status |
|
(None)
|
|
Formats |
|
plain text
pdf
htmlized (tools)
htmlized
bibtex
|
| Stream |
Stream state |
|
(No stream defined) |
|
Consensus Boilerplate |
|
Unknown
|
|
RFC Editor Note |
|
(None)
|
| IESG |
IESG state |
|
I-D Exists
|
|
Telechat date |
|
|
|
Responsible AD |
|
(None)
|
|
Send notices to |
|
(None)
|
Internet Engineering Task Force H. Chen
Internet-Draft R. Li
Intended status: Standards Track Futurewei
Expires: December 17, 2020 A. Kumar S N
RtBrick
N. So
V. Liu
M. Toy
Verizon
L. Liu
Fijitsu
June 15, 2020
Topology-Transparent Zone
draft-chen-isis-ttz-09.txt
Abstract
This document presents a topology-transparent zone in an area. A
zone is a block/piece of an area, which comprises a group of routers
and a number of circuits connecting them. It is abstracted as a
virtual entity such as a single pseudo node or zone edges mess. Any
router outside of the zone is not aware of the zone. The information
about the circuits and routers inside the zone is not distributed to
any router outside of the zone.
Status of This Memo
This Internet-Draft is submitted to IETF in full conformance with the
provisions of BCP 78 and BCP 79.
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 17, 2020.
Chen, et al. Expires December 17, 2020 [Page 1]
Internet-Draft TTZ June 2020
Copyright Notice
Copyright (c) 2020 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
carefully, as they describe your rights and restrictions with respect
to this document.
Table of Contents
1. Introduction . . . . . . . . . . . . . . . . . . . . . . . . 3
1.1. Requirements Language . . . . . . . . . . . . . . . . . . 3
1.2. Terminology . . . . . . . . . . . . . . . . . . . . . . . 3
2. Requirements . . . . . . . . . . . . . . . . . . . . . . . . 4
3. Zone Abstraction . . . . . . . . . . . . . . . . . . . . . . 4
4. Topology-Transparent Zone . . . . . . . . . . . . . . . . . . 5
4.1. Zone as a Single Pseudo Node . . . . . . . . . . . . . . 5
4.1.1. An Example of Zone as a Single Node . . . . . . . . . 5
4.1.2. Zone Leader Election . . . . . . . . . . . . . . . . 7
4.1.3. LS Generation for Zone as a Single Node . . . . . . . 8
4.1.4. Adjacency Establishment and Termination . . . . . . . 8
4.1.5. Computation of Routes . . . . . . . . . . . . . . . . 10
4.1.6. Extensions to Protocols . . . . . . . . . . . . . . . 11
4.2. Zone as Edges Full Mess . . . . . . . . . . . . . . . . . 15
4.2.1. Extensions to IS-IS . . . . . . . . . . . . . . . . . 15
4.3. Advertisement of LSs . . . . . . . . . . . . . . . . . . 16
4.3.1. Advertisement of LSs within Zone . . . . . . . . . . 16
4.3.2. Advertisement of LSs through Zone . . . . . . . . . . 16
5. Seamless Migration . . . . . . . . . . . . . . . . . . . . . 17
5.1. Transfer zone to a Single Node . . . . . . . . . . . . . 17
5.2. Roll Back from Zone as a Single Node . . . . . . . . . . 17
6. Operations . . . . . . . . . . . . . . . . . . . . . . . . . 20
7. Security Considerations . . . . . . . . . . . . . . . . . . 20
8. IANA Considerations . . . . . . . . . . . . . . . . . . . . . 20
8.1. OSPF . . . . . . . . . . . . . . . . . . . . . . . . . . 20
8.2. IS-IS . . . . . . . . . . . . . . . . . . . . . . . . . . 20
9. Contributors . . . . . . . . . . . . . . . . . . . . . . . . 21
10. Acknowledgement . . . . . . . . . . . . . . . . . . . . . . . 21
11. References . . . . . . . . . . . . . . . . . . . . . . . . . 21
11.1. Normative References . . . . . . . . . . . . . . . . . . 21
Show full document text