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 2021Show full document text