Browse Prior Art Database

Transparent Interconnection of Lots of Links (TRILL): Adjacency (RFC7177) Disclosure Number: IPCOM000236667D
Original Publication Date: 2014-May-01
Included in the Prior Art Database: 2014-May-09
Document File: 70 page(s) / 77K

Publishing Venue

Internet Society Requests For Comment (RFCs)

Related People

D. Eastlake 3rd: AUTHOR [+5]


The IETF Transparent Interconnection of Lots of Links (TRILL) protocol [RFC6325] provides optimal pair-wise data frame forwarding without configuration, safe forwarding even during transient loops, and support for transmission of both unicast and multicast traffic taking advantage of multiple paths in multi-hop networks with arbitrary topology. End stations are connected to TRILL switches with Ethernet, but TRILL switches can be interconnected with arbitrary link technology. TRILL accomplishes this by using [IS-IS] (Intermediate System to Intermediate System) link-state routing [RFC1195] [RFC7176] and a header in TRILL Data packets that includes a hop count. The design supports data labeling by Virtual Local Area Networks (VLANs) and fine-grained labels [RFC7172] as well as optimization of the distribution of multi-destination frames based on data label and multicast groups. Devices that implement TRILL are called TRILL switches or RBridges (Routing Bridges).

This text was extracted from an ASCII text file.
This is the abbreviated version, containing approximately 4% of the total text.

Internet Engineering Task Force (IETF)                   D. Eastlake 3rd Request for Comments: 7177                                        Huawei Obsoletes: 6327                                               R. Perlman Updates: 6325                                                 Intel Labs Category: Standards Track                                    A. Ghanwani ISSN: 2070-1721                                                     Dell                                                                  H. Yang                                                                    Cisco                                                                V. Manral                                                              Ionos Corp.                                                                 May 2014

     Transparent Interconnection of Lots of Links (TRILL): Adjacency


   The IETF Transparent Interconnection of Lots of Links (TRILL)    protocol supports arbitrary link technologies between TRILL switches,    including point-to-point links and multi-access Local Area Network    (LAN) links that can have multiple TRILL switches and end stations    attached.  TRILL uses Intermediate System to Intermediate System    (IS-IS) routing.  This document specifies the establishment,    reporting, and termination of IS-IS adjacencies between TRILL    switches, also known as RBridges (Routing Bridges).  It also concerns    four other link-local aspects of TRILL: Designated RBridge (DRB)    selection, MTU (Maximum Transmission Unit) testing, pseudonode    creation, and BFD (Bidirectional Forwarding Detection) session    bootstrapping in connection with adjacency.  State diagrams are    included where appropriate.  This document obsoletes RFC 6327 and    updates RFC 6325.

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