Problem Statement and Goals for Active-Active Connection at the Transparent Interconnection of Lots of Links (TRILL) Edge
RFC 7379
Document | Type | RFC - Informational (October 2014; No errata) | |
---|---|---|---|
Authors | Li Yizhou , Hao Weiguo , Radia Perlman , Jon Hudson , Hongjun Zhai | ||
Last updated | 2015-10-14 | ||
Replaces | draft-yizhou-trill-active-active-connection-prob | ||
Stream | Internent Engineering Task Force (IETF) | ||
Formats | plain text html pdf htmlized (tools) htmlized bibtex | ||
Reviews | |||
Stream | WG state | Submitted to IESG for Publication | |
Document shepherd | Donald Eastlake | ||
Shepherd write-up | Show (last changed 2014-05-14) | ||
IESG | IESG state | RFC 7379 (Informational) | |
Action Holders |
(None)
|
||
Consensus Boilerplate | Yes | ||
Telechat date | |||
Responsible AD | Ted Lemon | ||
Send notices to | (None) | ||
IANA | IANA review state | Version Changed - Review Needed | |
IANA action state | No IANA Actions |
Internet Engineering Task Force (IETF) Y. Li Request for Comments: 7379 W. Hao Category: Informational Huawei Technologies ISSN: 2070-1721 R. Perlman EMC J. Hudson Brocade H. Zhai JIT October 2014 Problem Statement and Goals for Active-Active Connection at the Transparent Interconnection of Lots of Links (TRILL) Edge Abstract The IETF TRILL (Transparent Interconnection of Lots of Links) protocol provides support for flow-level multipathing with rapid failover for both unicast and multi-destination traffic in networks with arbitrary topology. Active-active connection at the TRILL edge is the extension of these characteristics to end stations that are multiply connected to a TRILL campus. This informational document discusses the high-level problems and goals when providing active- active connection at the TRILL edge. Status of This Memo This document is not an Internet Standards Track specification; it is published for informational purposes. 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 5741. 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/rfc7379. Li, et al. Informational [Page 1] RFC 7379 Problems of Active-Active Connection October 2014 Copyright Notice Copyright (c) 2014 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. Table of Contents 1. Introduction ....................................................3 1.1. Terminology ................................................3 2. Target Scenario .................................................4 2.1. LAALP and Edge Group Characteristics .......................6 3. Problems in Active-Active Connection at the TRILL Edge ..........7 3.1. Frame Duplications .........................................7 3.2. Loopback ...................................................8 3.3. Address Flip-Flop ..........................................8 3.4. Unsynchronized Information among Member RBridges ...........8 4. High-Level Requirements and Goals for Solutions .................9 5. Security Considerations ........................................10 6. References .....................................................11 6.1. Normative References ......................................11 6.2. Informative References ....................................12 Acknowledgments ...................................................12 Authors' Addresses ................................................13 Li, et al. Informational [Page 2] RFC 7379 Problems of Active-Active Connection October 2014 1. Introduction The IETF TRILL (Transparent Interconnection of Lots of Links) [RFC6325] protocol provides loop-free and per-hop-based multipath data forwarding with minimum configuration. TRILL uses IS-IS [IS-IS] [RFC6165] [RFC7176] as its control-plane routing protocol and defines a TRILL-specific header for user data. In a TRILL campus, communications between TRILL switches can: 1) use multiple parallel links and/or paths, 2) spread load over different links and/or paths at a fine-grained flow level through equal-cost multipathing of unicast traffic and multiple distribution trees for multi-destination traffic, and 3) rapidly reconfigure to accommodate link or node failures orShow full document text