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Transparent Interconnection of Lots of Links (TRILL): Fine-Grained Labeling (RFC7172) Disclosure Number: IPCOM000236662D
Original Publication Date: 2014-May-01
Included in the Prior Art Database: 2014-May-09
Document File: 54 page(s) / 62K

Publishing Venue

Internet Society Requests For Comment (RFCs)

Related People

D. Eastlake 3rd: AUTHOR [+5]


The IETF has standardized the Transparent Interconnection of Lots of Links (TRILL) protocol [RFC6325], which provides a solution for least-cost transparent routing in multi-hop networks with arbitrary topologies and link technologies, using [IS-IS] [RFC6165] [RFC7176] link-state routing and a hop count. TRILL switches are sometimes called RBridges (Routing Bridges).

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Internet Engineering Task Force (IETF)                   D. Eastlake 3rd Request for Comments: 7172                                      M. Zhang Updates: 6325                                                     Huawei Category: Standards Track                                     P. Agarwal ISSN: 2070-1721                                                 Broadcom                                                               R. Perlman                                                               Intel Labs                                                                  D. Dutt                                                         Cumulus Networks                                                                 May 2014

          Transparent Interconnection of Lots of Links (TRILL):                          Fine-Grained Labeling


   The IETF has standardized Transparent Interconnection of Lots of    Links (TRILL), a protocol for least-cost transparent frame routing in    multi-hop networks with arbitrary topologies and link technologies,    using link-state routing and a hop count.  The TRILL base protocol    standard supports the labeling of TRILL Data packets with up to 4K    IDs.  However, there are applications that require a larger number of    labels providing configurable isolation of data.  This document    updates RFC 6325 by specifying optional extensions to the TRILL base    protocol to safely accomplish this.  These extensions, called fine-    grained labeling, are primarily intended for use in large data    centers, that is, those with more than 4K users requiring    configurable data isolation from each other.

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

 Eastlake, et al.             Standards Track                    [Page 1]
 RFC 7172              TRILL: Fine-...