IKEv2 Optional SA&TS Payloads in Child Exchange
draft-kampati-ipsecme-ikev2-sa-ts-payloads-opt-00

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Last updated 2019-02-18
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IPSECME                                                       S. Kampati
Internet-Draft                                                    Huawei
Intended status: Standards Track                            Feb 18, 2019
Expires: Aug 22, 2019                                                   
                                                                        

         IKEv2 Optional SA&TS Payloads in Child Exchange
      draft-kampati-ipsecme-ikev2-sa-ts-payloads-opt-00

Abstract

   This document describes a method for reduce the size of the Internet
   Key Exchange version 2 (IKEv2) exchanges at time of IKE rekey and
   Child SA Rekey by removing or making optional of SA & TS payloads.
   Reducing size of IKEv2 exchange is desirable for low power
   consumption battery powered devices. It also helps to avoid IP
   fragmentation of IKEv2 messages.

Status of This Memo

   This Internet-Draft is submitted in full conformance with the
   provisions of BCP 78 and BCP 79.

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   This Internet-Draft will expire on Aug 22, 2019.

Copyright Notice

   Copyright (c) 2019 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
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   (https://trustee.ietf.org/license-info) in effect on the date of
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   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
   2.  Conventions Used in This Document  . . . . . . . . . . . . . .  3
     2.1.  Requirements Language  . . . . . . . . . . . . . . . . . .  3
   3.  Protocol Details . . . . . . . . . . . . . . . . . . . . . . .  3
     3.1  Negotiation . . . . . . . . . . . . . . . . . . . . . . . .  3
     3.2  Rekeying IKE SAs with the CREATE_CHILD_SA . . . . . . . . .  4
       3.2.1  Exchange with out SA  payload . . . . . . . . . . . . .  4
       3.2.2  Exchange with optional SA  payload  . . . . . . . . . .  5
       3.2.3  Exchange when there is change in responder  . . . . . .  6
     3.3 Exchange without SA and TS payload . . . . . . . . . . . . .  7
   4 Security Considerations  . . . . . . . . . . . . . . . . . . . .  7
   5 IANA Considerations  . . . . . . . . . . . . . . . . . . . . . .  8
   4.  References . . . . . . . . . . . . . . . . . . . . . . . . . .  8
     4.1.  Normative References . . . . . . . . . . . . . . . . . . .  8
     4.2.  Informative References . . . . . . . . . . . . . . . . . .  8
   Authors' Addresses . . . . . . . . . . . . . . . . . . . . . . . .  9

1.  Introduction

   The Internet Key Exchange protocol version 2 (IKEv2) specified in
   [RFC7296] is used in the IP Security (IPsec) architecture for the
   purposes of Security Association (SA) parameters negotiation and
   authenticated key exchange.  The protocol uses UDP as the transport
   for its messages, which size varies from less than one hundred bytes
   to several kBytes.

   In 4G network security gateways/ePDG and in 5G networks cRAN/Cloud
   will support more than one 100000 IKE/IPSEC tunnels. So on an
   average, for every second we encounter many rekeys. This takes huge
   amount of bandwidth, packet fragmentation and more processing. This
   can be solved by introducing this solution.

   This is useful in Internet of Things (IoT) devices which utilizing
   lower power consumption technology. The appendix A of [IPSEC-IOT-
   REQS] gives some estimate data.
 

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   Most of devices they don't preferred to change suits frequently.
   Taking this advantage we can make SA and TS as optional payloads at
   time of IKE SA rekey and IPSEC  SA rekey.

   In ESP transport mode if when protocol ID and port numbers are any to
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