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 Withdrawn by ISE and put into Dead state |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
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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.
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