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
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Copyright and License Notice
Copyright (c) 2015 IETF Trust and the persons identified as the
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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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