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Transparent Interconnection of Lots of Links (TRILL) Active-Active Edge Using Multiple MAC Attachments (RFC7782) Disclosure Number: IPCOM000245295D
Original Publication Date: 2016-Feb-01
Included in the Prior Art Database: 2016-Feb-26
Document File: 44 page(s) / 48K

Publishing Venue

Internet Society Requests For Comment (RFCs)

Related People

M. Zhang: AUTHOR [+4]


As discussed in [RFC7379], in a TRILL (Transparent Interconnection of Lots of Links) Active-Active Edge (AAE) topology, a Local Active-Active Link Protocol (LAALP) -- for example, a Multi-Chassis Link Aggregation (MC-LAG) bundle -- is used to connect multiple RBridges (Routing Bridges or TRILL switches) to multi-port Customer Equipment (CE), such as a switch, virtual switch (vSwitch), or multi-port end station. A set of end nodes is attached in the case of a switch or vSwitch. It is required that data traffic within a specific VLAN from this end node set (including the multi-port end-station case) can be ingressed and egressed by any of these RBridges simultaneously. End systems in the set can spread their traffic among these edge RBridges at the flow level. When a link fails, end systems keep using the remaining links in the LAALP without waiting for the convergence of TRILL, which provides resilience to link failures.

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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


   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 s...