Transparent Interconnection of Lots of Links (TRILL) Distributed Layer 3 Gateway (RFC7956)
Original Publication Date: 2016-Sep-01
Included in the Prior Art Database: 2016-Sep-08
Internet Society Requests For Comment (RFCs)
W. Hao: AUTHOR [+4]
The TRILL (Transparent Interconnection of Lots of Links) protocol [RFC6325] [RFC7780] provides a solution for least-cost transparent routing in multi-hop networks with arbitrary topologies and link technologies, using IS-IS [IS-IS] [RFC7176] link-state routing and a hop count. TRILL switches are sometimes called RBridges (Routing Bridges).
Internet Engineering Task Force (IETF) W. Hao Request for Comments: 7956 Y. Li Category: Standards Track Huawei ISSN: 2070-1721 A. Qu MediaTec M. Durrani Equinix Inc. P. Sivamurugan IP Infusion September 2016
Transparent Interconnection of Lots of Links (TRILL) Distributed Layer 3 Gateway
The base TRILL (Transparent Interconnection of Lots of Links) protocol provides optimal pair-wise data frame forwarding for Layer 2 intra-subnet traffic but not for Layer 3 inter-subnet traffic. A centralized gateway solution is typically used for Layer 3 inter- subnet traffic forwarding but has the following issues:
1. Sub-optimum forwarding paths for inter-subnet traffic.
2. A centralized gateway that may need to support a very large number of gateway interfaces in a Data Center, one per tenant per Data Label used by that tenant, to provide interconnect functionality for all the Layer 2 Virtual Networks in a TRILL campus.
3. A traffic bottleneck at the gateway.
This document specifies an optional TRILL distributed gateway solution that resolves these centralized gateway issues.
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 7841.
Information about the current status of this document, any errata, and how to provide feedback on it may be obtained at http://www.rfc-editor.org/info/rfc7956.
Hao, et al. Standards Track ...