TRILL Working Group Donald Eastlake
INTERNET-DRAFT Huawei
Intended status: Proposed Standard Anoop Ghanwani
Updates: 6325 Dell
Vishwas Manral
HP
Yizhou Li
Huawei
Caitlin Bestler
Quantum
Expires: December 19, 2012 June 20, 2012
TRILL: Header Extension
<draft-ietf-trill-rbridge-extension-05.txt>
Abstract
The IETF TRILL (Transparent Interconnection of Lots of Links) base
protocol specifies minimal hooks to safely support TRILL Header
extensions. This document specifies an initial extension providing
additional flag bits and specifies some of those bits. It updates RFC
6325.
Status of This Memo
This Internet-Draft is submitted to IETF in full conformance with the
provisions of BCP 78 and BCP 79.
Distribution of this document is unlimited. Comments should be sent
to the TRILL working group mailing list <rbridge@postel.org>.
Internet-Drafts are working documents of the Internet Engineering
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D. Eastlake, et al [Page 1]
INTERNET-DRAFT TRILL: Header Extension
Table of Contents
1. Introduction............................................3
1.1 Conventions used in this document......................3
2. TRILL Header Extensions.................................4
2.1 RBridge Extended Flag Handling Requirements............5
2.2 No Critical Surprises..................................5
2.3 Extended Header Flags..................................6
2.3.1 Critical Summary Bits................................7
2.4 Conflict of Extensions.................................8
3. Specific Extended Header Flags..........................9
3.1 The RBridge Channel Alert Extended Flags...............9
4. Additions to IS-IS.....................................10
5. IANA Considerations....................................10
6. Security Considerations................................11
7. Acknowledgements.......................................11
8. Normative References...................................12
9. Informative References.................................12
Change History............................................13
D. Eastlake, et al [Page 2]
INTERNET-DRAFT TRILL: Header Extension
1. Introduction
The base IETF TRILL (Transparent Interconnection of Lots of Links)
protocol [RFC6325] [RFC6326bis] provides a TRILL Header extension
feature and describes minimal hooks to safely support header
extension. (This feature is called "options" in Section 3.8 of
[RFC6325].) But, except for the first two bits, the TRILL base
protocol document does not specify the structure of extensions to the
TRILL Header nor the details of any particular extension.
This document is consistent with [RFC6325] and provides further
details. It specifies an initial extension word providing additional
flag bits and specifies some of those bits. Additional extensions,
including TLV (Type, Length, Value) encoded options, may be specified
in later documents, for example [Options].
Section 2 below describes some general principles of TRILL header
extensions and an initial extension. Section 3 specifies pair of
flags in this initial extension.
1.1 Conventions used in this document
The terminology and acronyms defined in [RFC6325] are used herein
with the same meaning. Devices implementing the TRILL protocol are
datatracker.ietf.org