[rbridge] draft-gibanez-trill-abridge-00.txt
gibanez at it.uc3m.es ( Guillermo Ibáñez ) Sat, 10 December 2005 09:50 UTC
From: "gibanez at it.uc3m.es"
Date: Sat, 10 Dec 2005 10:50:21 +0100
Subject: [rbridge] draft-gibanez-trill-abridge-00.txt
Message-ID: <439AA4DD.2020605@it.uc3m.es>
I have submitted a draft (see below), with a proposal able to scale to large Ethernet campus networks, based on multiple self-rooted spanning trees (AMSTP protocol), two hierarchical spanning tree layers (AMSTP and RSTP), and optional ARP server/registrars. To prevent confusion with Rbridges, I use the term Abridges (Alternative or Adaptive Routing Bridges). I hope you will find it interesting. Regards Guillermo Date: Fri, 09 Dec 2005 15:50:01 -0500 From: Internet-Drafts at ietf.org <mailto:Internet-Drafts at ietf.org> Subject: I-D ACTION:draft-gibanez-trill-abridge-00 To: i-d-announce at ietf.org <mailto:i-d-announce at ietf.org> Message-ID: <E1EkpBp-0006TE-PP at newodin.ietf.org <mailto:E1EkpBp-0006TE-PP at newodin.ietf.org>> Content-Type: text/plain; charset="us-ascii" A New Internet-Draft is available from the on-line Internet-Drafts directories. Title : Abridges as Rbridges: Transparent Routing with Simplified Multiple Spanning Trees Author(s) : G. Ibanez, et al. Filename : draft-gibanez-trill-abridge-00.txt Pages : 17 Date : 2005-12-9 Rbridges are link layer devices that use routing protocols as a control plane but do not target to scale up to large campus networks. This document contains an alternative proposal to link-state Rbridges, named Abridges. Abridges overcome Rbridges L2 network size restrictions allowing applicability to very large Ethernet campus networks while maintaining zero configuration and high performance, by assuming a topological restriction that is automatically performed. The proposal includes a two-layered network architecture with two hierarchical independent spanning tree layers. Expected convergence is fast, probably below two seconds. Abridges use multiple simplified spanning trees rooted at core edge bridges to achieve results comparable to Rbridges with lower computational complexity. Two implementation variants of simplified multiple spanning trees are proposed: The first one is a fundamental simplification of the standard Multiple Spanning Tree protocol and the second one (still in a very preliminary stage) consists of an N-multiple simultaneous execution of the Rapid Spanning Tree protocol at each Rbridge. An optional mechanism of ARP/Abridge servers/registrars (with load splitting) is proposed to limit ARP traffic in large scale Ethernet networks and to enhance scalability and security. This mechanism can also be used for host-Designated Rbridge resolution as an alternative to the interchange of Hosts Lists between Rbridges. A URL for this Internet-Draft is: http://www.ietf.org/internet-drafts/draft-gibanez-trill-abridge-00.txt <http://www.ietf.org/internet-drafts/draft-gibanez-trill-abridge-00.txt> -------------- next part -------------- An HTML attachment was scrubbed... URL: http://www.postel.org/pipermail/rbridge/attachments/20051210/0c3690b5/attachment.html
- [rbridge] draft-gibanez-trill-abridge-00.txt Guillermo Ibáñez