Transparent Interconnection of Lots of Links (TRILL): Adjacency (RFC7177)
Original Publication Date: 2014-May-01
Included in the Prior Art Database: 2014-May-09
Internet Society Requests For Comment (RFCs)
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).
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.
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