Internet DRAFT - draft-liu-nvo3-vxlan-security-option

draft-liu-nvo3-vxlan-security-option



 



Network Working Group                                       Yuanjiao Liu
Internet Draft                                                 Wenhui Li
Intended Category: Standard                                       Huawei
Expires: November 19, 2015                                  May 19, 2015

                         VXLAN Security Option
              draft-liu-nvo3-vxlan-security-option-01.txt

Abstract

   This document introduces the security extension of the VXLAN
   encapsulation.

Status of this Memo

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

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Copyright and License 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
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   (http://trustee.ietf.org/license-info) in effect on the date of
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   carefully, as they describe your rights and restrictions with respect
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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
 


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   described in the Simplified BSD License.


Table of Contents

   1. Introduction  . . . . . . . . . . . . . . . . . . . . . . . . .  2
   2. Acronyms and Terminology  . . . . . . . . . . . . . . . . . . .  2
     2.1. Acronyms and Terms  . . . . . . . . . . . . . . . . . . . .  2
     2.2. Terminology . . . . . . . . . . . . . . . . . . . . . . . .  2
   3. Protocol Extension  . . . . . . . . . . . . . . . . . . . . . .  3
   4. Backward Compatibility  . . . . . . . . . . . . . . . . . . . .  3
   5. Security Considerations . . . . . . . . . . . . . . . . . . . .  4
   6. IANA Considerations . . . . . . . . . . . . . . . . . . . . . .  4
   7. References  . . . . . . . . . . . . . . . . . . . . . . . . . .  4
     7.1. Normative References  . . . . . . . . . . . . . . . . . . .  4
     7.2. Informative References  . . . . . . . . . . . . . . . . . .  4
   Author's Addresses . . . . . . . . . . . . . . . . . . . . . . . .  5

1. Introduction

   Network Virtualization Overlays (NVO3) enable network virtualization
   for data center networks environment that assumes an IP-based
   underlay.

   [GUE] specifies a security extension of the UDP tunnel, which can be
   used to secure the network virtualization overlay over IP networks.
   However, [GUE] does not apply to VXLAN encapsulation which has
   already been deployed some where. 

   VXLAN encapsulation is specified in [RFC7348]. In this document,
   security is specified as an optional field of the VXLAN header. This
   extension exposes the VNI to the NVEs. In other words, it allows per
   VNI security configuration. For example, VNI 1 enables the security
   transportation while VNI 2 disables the security transportation. 

2. Acronyms and Terminology

2.1. Acronyms and Terms

   VXLAN: Virtual eXtensible Local Area Network

   NVO3: Network Virtualization Overlays

2.2. Terminology

   The key words "MUST", "MUST NOT", "REQUIRED", "SHALL", "SHALL NOT",
   "SHOULD", "SHOULD NOT", "RECOMMENDED", "MAY", and "OPTIONAL" in this
   document are to be interpreted as described in RFC 2119 [RFC2119].
 


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   Familiarity with [RFC7348] is assumed in this document.

3. Protocol Extension

   In the VXLAN header, two bits (bit 9 and bit 10) are used to indicate
   the security extension. 

     VXLAN Header and Body:
     +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
     |R|R|R|R|I|R|R|R|SEC|         Reserved                          |
     +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
     |                VXLAN Network Identifier (VNI) |   Reserved    |
     +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
     |               Security Parameters Index (SPI)                 |
     +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
     |                      Sequence Number                          |
     +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
     |                    Payload Data* (variable)                   |
     ~                                                               ~
     |                                                               |
     +               +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
     |               |     Padding (0-255 bytes)                     |
     +-+-+-+-+-+-+-+-+               +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
     |                               |  Pad Length   | Next Header   |
     +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
     |         Integrity Check Value-ICV   (variable)                |
     ~                                                               ~
     |                                                               |
     +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+


      'SEC' Security flags:
          o   00 - No security field
          o   01 - ESP Mode
          o   10 - Reserved
          o   11 - Reserved

      'Next Header' flags:
          o   0x0 - Reserved
          o   0x1 - Ethernet frame packet
          o   0x2 - IPv4 packet
          o   0x3 - IPv6 packet
          o   Others - Reserved


      Figure 3.1: The security extension of VXLAN header and body.

4. Backward Compatibility
 


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   Legacy devices that do not support the security extension in this
   document will simply ignore the optional Security field. The Security
   field being received will be incorrectly processed as the Ethernet
   header. In other words, the extension specified in this document is
   not backward compatible. When there is a connection between a legacy
   VXLAN device and a new VXLAN device, the Security feature of the new
   VXLAN device defined in this document MUST be disabled. By doing
   this, the new VXLAN device simple downgrades to a legacy VLAN device.

5. Security Considerations

   This document introduces the per VNI security for VXLAN.

6. IANA Considerations

   The document does not require any IANA action. RFC editor, please
   remove this section before publication.

7. References 

7.1. Normative References

   [RFC2119] Bradner, S., "Key words for use in RFCs to Indicate
             Requirement Levels", BCP 14, RFC 2119, March 1997.

   [RFC7348] Mahalingam, M., Dutt, D., Duda, K., Agarwal, P., Kreeger,
             L., Sridhar, T., Bursell, M., and C. Wright, "Virtual
             eXtensible Local Area Network (VXLAN): A Framework for
             Overlaying Virtualized Layer 2 Networks over Layer 3
             Networks", RFC 7348, August 2014. 

   [RFC4303] [RFC4303]  Kent, S., "IP Encapsulating Security Payload
             (ESP)", RFC 4303, December 2005. 

7.2. Informative References

   [GUE]     L. Yong and T. Herbert, "Generic UDP Encapsulation (GUE)
             for Secure Transport ", draft-hy-gue-4-secure-transport,
             work in progress.









 


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Author's Addresses


   Yuanjiao Liu
   Huawei Technologies
   No.156 Beiqing Rd. Haidian District,
   Beijing 100095 P.R. China

   EMail: liuyuanjiao@huawei.com


   Wenhui Li
   Huawei Technologies
   No.156 Beiqing Rd. Haidian District,
   Beijing 100095 P.R. China

   EMail: jason.liwenhui@huawei.com


































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