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Transparent Interconnection of Lots of Links (TRILL): Pseudo-Nickname for Active-Active Access (RFC7781) Disclosure Number: IPCOM000245294D
Original Publication Date: 2016-Feb-01
Included in the Prior Art Database: 2016-Feb-26
Document File: 70 page(s) / 80K

Publishing Venue

Internet Society Requests For Comment (RFCs)

Related People

H. Zhai: AUTHOR [+5]


The IETF TRILL (Transparent Interconnection of Lots of Links) protocol [RFC6325] provides optimal pair-wise data frame forwarding without configuration, safe forwarding even during periods of temporary loops, and support for multipathing of both unicast and multicast traffic. TRILL accomplishes this by using IS-IS [IS-IS] [RFC7176] link-state routing and encapsulating traffic using a header that includes a Hop Count. Devices that implement TRILL are called RBridges (Routing Bridges) or TRILL switches.

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Internet Engineering Task Force (IETF)                           H. Zhai Request for Comments: 7781                                           JIT Category: Standards Track                                T. Senevirathne ISSN: 2070-1721                                               Consultant                                                               R. Perlman                                                                      EMC                                                                 M. Zhang                                                                    Y. Li                                                      Huawei Technologies                                                            February 2016

          Transparent Interconnection of Lots of Links (TRILL):                 Pseudo-Nickname for Active-Active Access


   The IETF TRILL (Transparent Interconnection of Lots of Links)    protocol provides support for flow-level multipathing for both    unicast and multi-destination traffic in networks with arbitrary    topology.  Active-active access at the TRILL edge is the extension of    these characteristics to end stations that are multiply connected to    a TRILL campus as discussed in RFC 7379.  In this document, the edge    RBridge (Routing Bridge, or TRILL switch) group providing active-    active access to such an end station is represented as a virtual    RBridge.  Based on the concept of the virtual RBridge, along with its    pseudo-nickname, this document specifies a method for TRILL active-    active access by such end stations.

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

Zhai, et al.                 Standards Track                    [Page 1]
 RFC 7781                     Pseudo-Nickname               February 2...