Protocol Independent Multicast - Sparse Mode (PIM-SM) Designated Router (DR) Improvement
draft-ietf-pim-dr-improvement-11
| Document | Type | Active Internet-Draft (pim WG) | |
|---|---|---|---|
| Authors | Zheng Zhang , fangwei hu , BenChong Xu , Mankamana Mishra | ||
| Last updated | 2021-02-17 | ||
| Replaces | draft-zhang-pim-dr-improvement | ||
| Stream | Internent Engineering Task Force (IETF) | ||
| Intended RFC status | Proposed Standard | ||
| Formats | plain text xml pdf htmlized (tools) htmlized bibtex | ||
| Stream | WG state | WG Document | |
| On Agenda | pim at IETF-110 | ||
| Document shepherd | Stig Venaas | ||
| Shepherd write-up | Show (last changed 2019-10-27) | ||
| IESG | IESG state | AD is watching | |
| Action Holders |
(None)
|
||
| Consensus Boilerplate | Yes | ||
| Telechat date | |||
| Responsible AD | Alvaro Retana | ||
| Send notices to | Stig Venaas <stig@venaas.com>, aretana.ietf@gmail.com | ||
PIM WG Z. Zhang
Internet-Draft ZTE Corporation
Intended status: Standards Track F. Hu
Expires: August 21, 2021 Individual
B. Xu
ZTE Corporation
M. Mishra
Cisco Systems
February 17, 2021
Protocol Independent Multicast - Sparse Mode (PIM-SM) Designated Router
(DR) Improvement
draft-ietf-pim-dr-improvement-11
Abstract
Protocol Independent Multicast - Sparse Mode (PIM-SM) is a widely
deployed multicast protocol. As deployment for the PIM protocol is
growing day by day, a user expects lower packet loss and faster
convergence regardless of the cause of the network failure. This
document defines an extension to the existing protocol, which
improves the PIM's stability with respect to packet loss and
convergence time when the PIM Designated Router (DR) role changes.
Status of This Memo
This Internet-Draft is submitted in full conformance with the
provisions of BCP 78 and BCP 79.
Internet-Drafts are working documents of the Internet Engineering
Task Force (IETF). Note that other groups may also distribute
working documents as Internet-Drafts. The list of current Internet-
Drafts is at https://datatracker.ietf.org/drafts/current/.
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."
This Internet-Draft will expire on August 21, 2021.
Copyright Notice
Copyright (c) 2021 IETF Trust and the persons identified as the
document authors. All rights reserved.
Zhang, et al. Expires August 21, 2021 [Page 1]
Internet-Draft PIM DR Improvement February 2021
This document is subject to BCP 78 and the IETF Trust's Legal
Provisions Relating to IETF Documents
(https://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.
Table of Contents
1. Introduction . . . . . . . . . . . . . . . . . . . . . . . . 2
1.1. Keywords . . . . . . . . . . . . . . . . . . . . . . . . 3
2. Terminology . . . . . . . . . . . . . . . . . . . . . . . . . 3
3. Protocol Specification . . . . . . . . . . . . . . . . . . . 4
3.1. Election Algorithm . . . . . . . . . . . . . . . . . . . 5
3.2. Sending Hello Messages . . . . . . . . . . . . . . . . . 7
3.3. Receiving Hello Messages . . . . . . . . . . . . . . . . 8
3.4. Working with the DRLB function . . . . . . . . . . . . . 8
4. PIM Hello message format . . . . . . . . . . . . . . . . . . 8
4.1. DR Address Option format . . . . . . . . . . . . . . . . 9
4.2. BDR Address Option format . . . . . . . . . . . . . . . . 9
4.3. Error handling . . . . . . . . . . . . . . . . . . . . . 10
5. Backwards Compatibility . . . . . . . . . . . . . . . . . . . 10
6. Security Considerations . . . . . . . . . . . . . . . . . . . 10
7. IANA Considerations . . . . . . . . . . . . . . . . . . . . . 11
8. Acknowledgements . . . . . . . . . . . . . . . . . . . . . . 11
9. References . . . . . . . . . . . . . . . . . . . . . . . . . 11
9.1. Normative References . . . . . . . . . . . . . . . . . . 11
9.2. Informative References . . . . . . . . . . . . . . . . . 12
Authors' Addresses . . . . . . . . . . . . . . . . . . . . . . . 12
1. Introduction
Multicast technology, with PIM-SM ([RFC7761]), is used widely in
Modern services. Some events, such as changes in unicast routes, or
a change in the PIM-SM DR, may cause the loss of multicast packets.
The PIM DR has two responsibilities in the PIM-SM protocol. For any
active sources on a LAN, the PIM DR is responsible for registering
with the Rendezvous Point (RP). Also, the PIM DR is responsible for
tracking local multicast listeners and forwarding data to these
listeners.
Zhang, et al. Expires August 21, 2021 [Page 2]
Internet-Draft PIM DR Improvement February 2021
Show full document text