A Record of Discussions of Graceful Restart Extensions for Bidirectional Forwarding Detection (BFD)
draft-palanivelan-bfd-v2-gr-13
Document | Type | Active Internet-Draft | |
---|---|---|---|
Last updated | 2015-10-14 (latest revision 2011-11-17) | ||
Stream | ISE | ||
Intended RFC status | Historic | ||
Formats | plain text pdf html bibtex | ||
Stream | ISE state | (None) | |
Consensus Boilerplate | Unknown | ||
Document shepherd | No shepherd assigned | ||
IESG | IESG state | I-D Exists (IESG: Dead) | |
Telechat date | |||
Responsible AD | Adrian Farrel | ||
IESG note |
ISE submission. Withdrawn by ISE and put into Dead state |
||
Send notices to | apvelan@cisco.com, rfc-ise@rfc-editor.org |
INTERNET-DRAFT A.Palanivelan Intended Status: Historic EMC Corporation Expires: May 20, 2012 Nov 17, 2011 A Record of Discussions of Graceful Restart Extensions for Bidirectional Forwarding Detection (BFD) draft-palanivelan-bfd-v2-gr-13 Status of this Memo This Internet-Draft is submitted to IETF in full conformance with the provisions of BCP 78 and BCP 79. Internet-Drafts are working documents of the Internet Engineering Task Force (IETF), its areas, and its working groups. Note that other groups may also distribute working documents as Internet-Drafts. Internet-Drafts are draft documents valid for a maximum of six months and may be updated, replaced, or obsoleted by other documents at any time. It is inappropriate to use Internet-Drafts as reference material or to cite them other than as "work in progress." The list of current Internet-Drafts can be accessed at http://www.ietf.org/1id-abstracts.html The list of Internet-Draft Shadow Directories can be accessed at http://www.ietf.org/shadow.html Copyright and License Notice Copyright (c) 2011 IETF Trust and the persons identified as the document authors. All rights reserved. This document is subject to BCP 78 and the IETF Trust's Legal Provisions Relating to IETF Documents (http://trustee.ietf.org/license-info) in effect on the date of publication of this document. Please review these documents carefully, as they describe your rights and restrictions with respect to this document. Code Components extracted from this document must include Simplified BSD License text as described in Section 4.e of the Trust Legal Provisions and are provided without warranty as described in the Simplified BSD License. A.Palanivelan Expires May 20, 2012 [Page 1] INTERNET DRAFT draft-palanivelan-bfd-v2-gr-13 May 08, 2011 Abstract This document is a historical record of discussions about extending the Bidirectional Forwarding Detection (BFD) protocol to provide additional capabilities to handle Graceful Restart. These discussions took place in the context of the IETF's BFD working group, and the consensus in that group was that these extensions should not be made. This document presents a summary of the challenges to BFD in surviving a graceful restart, and outlines a potential protocol solution that was discussed and rejected within the BFD working group. The purpose of this document is to provide a record of the work done so that future effort will not be wasted. This document does not propose or document any extensions to BFD, and there is no intention that it should be implemented in its current form. Table of Contents 1 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . 3 2 Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 3 Motivations . . . . . . . . . . . . . . . . . . . . . . . . . . 4 3.1 Restarts with control protocols . . . . . . . . . . . . . . 4 3.2 BFD Co-existing with Broadband configurations . . . . . . . 5 4. Extensions to BFD . . . . . . . . . . . . . . . . . . . . . . . 6 4.1 Diagnostic (Diag) . . . . . . . . . . . . . . . . . . . . . 6 4.2 State (Sta) . . . . . . . . . . . . . . . . . . . . . . . . 7 4.3 My Restart Interval . . . . . . . . . . . . . . . . . . . . 7 4.4 Your Restart Interval . . . . . . . . . . . . . . . . . . . 7 5. State Machine for BFD with GR Support . . . . . . . . . . . . . 8 6. Theory of Operation . . . . . . . . . . . . . . . . . . . . . . 10 6.1. Session Establishment and GR Timer exchange . . . . . . . . 10 6.2. Remote Neighbor Restart and Recovery . . . . . . . . . . . 11 7 Security Considerations . . . . . . . . . . . . . . . . . . . . 12 8 IANA Considerations . . . . . . . . . . . . . . . . . . . . . . 13 9 Acknowledgments . . . . . . . . . . . . . . . . . . . . . . . . 13 10 References . . . . . . . . . . . . . . . . . . . . . . . . . . 13 10.1 Normative References . . . . . . . . . . . . . . . . . . . 13 10.2 Informative References . . . . . . . . . . . . . . . . . . 13 Authors' Addresses . . . . . . . . . . . . . . . . . . . . . . . . 14 A.Palanivelan Expires May 20, 2012 [Page 2] INTERNET DRAFT draft-palanivelan-bfd-v2-gr-13 May 08, 2011 1 Introduction The Bidirectional Forwarding Detection protocol [BFD] provides mechanism for liveness detection of arbitrary paths between systems. It is intended to provide low-overhead, short-duration detection of failures in the path between adjacent forwarding engines, includingShow full document text