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Packet-Loss Resiliency for Router Solicitations (RFC7559) Disclosure Number: IPCOM000241777D
Original Publication Date: 2015-May-01
Included in the Prior Art Database: 2015-May-30
Document File: 12 page(s) / 12K

Publishing Venue

Internet Society Requests For Comment (RFCs)

Related People

S. Krishnan: AUTHOR [+3]


As specified in [RFC4861], when an interface on a host is initialized, in order to obtain Router Advertisements quickly, a host transmits up to MAX_RTR_SOLICITATIONS (3) Router Solicitation (RS) messages, each separated by at least RTR_SOLICITATION_INTERVAL (4) seconds. In certain scenarios, these Router Solicitations transmitted by the host might be lost. For example, the host is connected to a bridged residential gateway over Ethernet or Wi-Fi. LAN connectivity is achieved at interface initialization, but the upstream WAN connectivity is not active yet. In this case, the host just gives up after the initial RS retransmits.

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Internet Engineering Task Force (IETF)                       S. Krishnan Request for Comments: 7559                                      Ericsson Updates: 4861                                                  D. Anipko Category: Standards Track                                   Unaffiliated ISSN: 2070-1721                                                D. Thaler                                                                Microsoft                                                                 May 2015

             Packet-Loss Resiliency for Router Solicitations


   When an interface on a host is initialized, the host transmits Router    Solicitations in order to minimize the amount of time it needs to    wait until the next unsolicited multicast Router Advertisement is    received.  In certain scenarios, these Router Solicitations    transmitted by the host might be lost.  This document specifies a    mechanism for hosts to cope with the loss of the initial Router    Solicitations.

Status of This Memo

   This is an Internet Standards Track document.

   This document is a product of the Internet Engineering Task Force    (IETF).  It represents the consensus of the IETF community.  It has    received public review and has been approved for publication by the    Internet Engineering Steering Group (IESG).  Further information on    Internet Standards is available in Section 2 of RFC 5741.

   Information about the current status of this document, any errata,    and how to provide feedback on it may be obtained at

Krishnan, et al.             Standards Track                    [Page 1]
 RFC 7559               Resilient RS Retransmission              May 2015

 Copyright Notice

   Copyright (c) 2015 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    ( 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 ...