Transparent Interconnection of Lots of Links (TRILL) Active-Active Edge Using Multiple MAC Attachments
RFC 7782
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Type |
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RFC - Proposed Standard
(February 2016; No errata)
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Last updated |
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2016-02-25
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Replaces |
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draft-zhang-trill-aa-multi-attach
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IETF
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plain text
pdf
html
bibtex
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WG state
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Submitted to IESG for Publication
Dec 2014
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Document shepherd |
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Donald Eastlake
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Shepherd write-up |
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Show
(last changed 2015-08-13)
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IESG state |
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RFC 7782 (Proposed Standard)
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Consensus Boilerplate |
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Yes
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Telechat date |
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Responsible AD |
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Alia Atlas
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Send notices to |
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(None)
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IANA review state |
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Version Changed - Review Needed
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IANA action state |
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RFC-Ed-Ack
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Internet Engineering Task Force (IETF) M. Zhang
Request for Comments: 7782 Huawei
Category: Standards Track R. Perlman
ISSN: 2070-1721 EMC
H. Zhai
Astute Technology
M. Durrani
Cisco Systems
S. Gupta
IP Infusion
February 2016
Transparent Interconnection of Lots of Links (TRILL)
Active-Active Edge Using Multiple MAC Attachments
Abstract
TRILL (Transparent Interconnection of Lots of Links) active-active
service provides end stations with flow-level load balance and
resilience against link failures at the edge of TRILL campuses, as
described in RFC 7379.
This document specifies a method by which member RBridges (also
referred to as Routing Bridges or TRILL switches) in an active-active
edge RBridge group use their own nicknames as ingress RBridge
nicknames to encapsulate frames from attached end systems. Thus,
remote edge RBridges (who are not in the group) will see one host
Media Access Control (MAC) address being associated with the multiple
RBridges in the group. Such remote edge RBridges are required to
maintain all those associations (i.e., MAC attachments) and to not
flip-flop among them (as would occur prior to the implementation of
this specification). The design goals of this specification are
discussed herein.
Status of This Memo
This is an Internet Standards Track document.
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). Further information on
Internet Standards is available in 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/rfc7782.
Zhang, et al. Standards Track [Page 1]
RFC 7782 Multi-Attach for Active-Active Edge February 2016
Copyright Notice
Copyright (c) 2016 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
2. Acronyms and Terminology ........................................4
3. Overview ........................................................5
4. Incremental Deployable Options ..................................6
4.1. Details of Option B ........................................7
4.1.1. Advertising Data Labels for Active-Active Edge ......7
4.1.2. Discovery of Active-Active Edge Members .............8
4.1.3. Advertising Learned MAC Addresses ...................9
4.2. Extended RBridge Capability Flags APPsub-TLV ..............11
5. Meeting the Design Goals .......................................12
5.1. No MAC Address Flip-Flopping (Normal Unicast Egress) ......12
5.2. Regular Unicast/Multicast Ingress .........................12
5.3. Correct Multicast Egress ..................................12
5.3.1. No Duplication (Single Exit Point) .................12
5.3.2. No Echo (Split Horizon) ............................13
5.4. No Black-Hole or Triangular Forwarding ....................14
5.5. Load Balance towards the AAE ..............................14
5.6. Scalability ...............................................14
6. E-L1FS Backward Compatibility ..................................15
7. Security Considerations ........................................15
8. IANA Considerations ............................................16
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