Performance Measurement for Geneve
draft-xiao-nvo3-pm-geneve-04
NVO3 Working Group X. Min
Internet-Draft ZTE Corp.
Intended status: Standards Track G. Mirsky
Expires: 15 May 2022 Ericsson
S. Pallagatti
VMware
11 November 2021
Performance Measurement for Geneve
draft-xiao-nvo3-pm-geneve-04
Abstract
This document describes the method to achieve Performance Measurement
(PM) in point-to-point Generic Network Virtualization Encapsulation
(Geneve) tunnels used to make up an overlay network.
Status of This Memo
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This Internet-Draft will expire on 15 May 2022.
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Table of Contents
1. Introduction . . . . . . . . . . . . . . . . . . . . . . . . 2
2. Conventions Used in This Document . . . . . . . . . . . . . . 2
2.1. Abbreviations . . . . . . . . . . . . . . . . . . . . . . 2
2.2. Requirements Language . . . . . . . . . . . . . . . . . . 3
3. PM Packet Transmission over Geneve Tunnel . . . . . . . . . . 3
3.1. PM Encapsulation With Inner Ethernet/IP/UDP Header . . . 3
3.2. PM Encapsulation With Inner IP/UDP Header . . . . . . . . 5
4. Reception of PM packet from Geneve Tunnel . . . . . . . . . . 7
4.1. Demultiplexing of the PM packet . . . . . . . . . . . . . 7
5. Security Considerations . . . . . . . . . . . . . . . . . . . 7
6. IANA Considerations . . . . . . . . . . . . . . . . . . . . . 7
7. Acknowledgements . . . . . . . . . . . . . . . . . . . . . . 7
8. References . . . . . . . . . . . . . . . . . . . . . . . . . 7
8.1. Normative References . . . . . . . . . . . . . . . . . . 7
8.2. Informative References . . . . . . . . . . . . . . . . . 8
Authors' Addresses . . . . . . . . . . . . . . . . . . . . . . . 8
1. Introduction
"Generic Network Virtualization Encapsulation" (Geneve) [RFC8926]
provides an encapsulation scheme that allows building an overlay
network by decoupling the address space of the attached virtual hosts
from that of the network.
This document describes the use of "Simple Two-way Active Measurement
Protocol" (STAMP) [RFC8762] and "Simple Two-Way Active Measurement
Protocol Optional Extensions" (STAMP Optional Extensions) [RFC8972],
to enable measuring the performance of the path between two Geneve
tunnel endpoints, like delay, delay variation, and packet loss.
Analogous to [I-D.ietf-nvo3-bfd-geneve], in this document, Network
Virtualization Edge (NVE) represents the Geneve tunnel endpoint,
Tenant System (TS) represents the physical or virtual device attached
to a Geneve tunnel endpoint from the outside, Virtual Access Point
(VAP) represents the NVE side of the interface between the NVE and
the TS, the usage of Management Virtual Network Identifier (VNI) is
described in [I-D.ietf-nvo3-geneve-oam] and outside the scope of this
document.
2. Conventions Used in This Document
2.1. Abbreviations
Geneve: Generic Network Virtualization Encapsulation
NVE: Network Virtualization Edge
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PM: Performance Measurement
SSID: STAMP Session Identifier
STAMP: Simple Two-way Active Measurement Protocol
TS: Tenant System
VAP: Virtual Access Point
VNI: Virtual Network Identifier
2.2. Requirements Language
The key words "MUST", "MUST NOT", "REQUIRED", "SHALL", "SHALL NOT",
"SHOULD", "SHOULD NOT", "RECOMMENDED", "NOT RECOMMENDED", "MAY", and
"OPTIONAL" in this document are to be interpreted as described in BCP
14 [RFC2119] [RFC8174] when, and only when, they appear in all
capitals, as shown here.
3. PM Packet Transmission over Geneve Tunnel
PM session is originated and terminated at VAP of an NVE, selection
of the PM packet encapsulation is based on how the VAP encapsulates
the data packets. This document defines two formats of PM packet
encapsulation in Geneve:
* with Ethernet and IP/UDP encapsulation;
* with IP/UDP encapsulation.
3.1. PM Encapsulation With Inner Ethernet/IP/UDP Header
If the VAP that originates the PM packets is used to encapsulate
Ethernet data frames, then PM packets are encapsulated in Geneve as
described below, here the PM packets are STAMP test packets.
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0 1 2 3
0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| |
~ Outer Ethernet Header ~
| |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| |
~ Outer IPvX Header ~
| |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| |
~ Outer UDP Header ~
| |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| |
~ Geneve Header ~
| |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| |
~ Inner Ethernet Header ~
| |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| |
~ Inner IPvX Header ~
| |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| |
~ Inner UDP Header ~
| |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| |
~ STAMP Test Packet ~
| |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Outer Ethernet FCS |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
Figure 1: Geneve Encapsulation of PM Packet With the Inner
Ethernet/IP/UDP Header
The STAMP test packet MUST be carried inside the inner Ethernet frame
of the Geneve packet, immediately after the inner Ethernet/IP/UDP
header. The inner Ethernet frame carrying the STAMP test packet has
the following format:
The Ethernet header and IP header are encoded as defined in
Section 3.1 of [I-D.ietf-nvo3-bfd-geneve].
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The destination UDP port MUST follow the STAMP UDP port usage
defined in Section 4.1 of [RFC8762].
The STAMP test packet can be STAMP Session-Sender test packet or
STAMP Session-Reflector test packet. The STAMP test packet is
encoded as specified in [RFC8762] and [RFC8972].
When the PM packets are encapsulated in Geneve in this way, the
values in the Geneve header are set as specified in Section 3.1 of
[I-D.ietf-nvo3-bfd-geneve].
3.2. PM Encapsulation With Inner IP/UDP Header
If the VAP that originates the PM packets is used to encapsulate IP
data packets, then PM packets are encapsulated in Geneve as described
below, here the PM packets are STAMP test packets.
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0 1 2 3
0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| |
~ Ethernet Header ~
| |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| |
~ Outer IPvX Header ~
| |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| |
~ Outer UDP Header ~
| |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| |
~ Geneve Header ~
| |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| |
~ Inner IPvX Header ~
| |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| |
~ Inner UDP Header ~
| |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| |
~ STAMP Test Packet ~
| |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| FCS |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
Figure 2: Geneve Encapsulation of PM Packet With the Inner IP/UDP
Header
The STAMP test packet MUST be carried inside the inner IP packet that
immediately follows the Geneve header. The inner IP packet carrying
the STAMP test packet has the following format:
The IP header is encoded as defined in Section 3.2 of
[I-D.ietf-nvo3-bfd-geneve].
The destination UDP port MUST follow the STAMP UDP port usage
defined in Section 4.1 of [RFC8762].
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The STAMP test packet can be STAMP Session-Sender test packet or
STAMP Session-Reflector test packet. The STAMP test packet is
encoded as specified in [RFC8762] and [RFC8972].
When the PM packets are encapsulated in Geneve in this way, the
values in the Geneve header are set as specified in Section 3.2 of
[I-D.ietf-nvo3-bfd-geneve].
4. Reception of PM packet from Geneve Tunnel
Once a packet is received, the NVE MUST validate the packet as
specified in Section 4 of [I-D.ietf-nvo3-bfd-geneve], except that the
received STAMP test packet would be processed by STAMP Session-Sender
or STAMP Session-Reflector, instead of BFD.
4.1. Demultiplexing of the PM packet
Analogous to BFD over Geneve, multiple STAMP sessions for the same
VNI may be running between two NVEs, so there needs to be a mechanism
for demultiplexing received STAMP test packets to the proper session.
If the STAMP test packet is received with STAMP Session Identifier
(SSID) equals to 0, the procedure for demultiplexing the received
STAMP test packets would follow the procedure for demultiplexing the
received BFD packets with Your Discriminator equals to 0, which is
specified in Section 4.1 of [I-D.ietf-nvo3-bfd-geneve].
If the STAMP test packet is received with a non-zero SSID, then the
STAMP session MUST be demultiplexed only with SSID as the key.
5. Security Considerations
This document does not raise any additional security issues beyond
those of the specifications referred to in the list of references.
6. IANA Considerations
This document has no IANA action requested.
7. Acknowledgements
TBA.
8. References
8.1. Normative References
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[I-D.ietf-nvo3-bfd-geneve]
Min, X., Mirsky, G., Pallagatti, S., Tantsura, J., and S.
Aldrin, "BFD for Geneve", Work in Progress, Internet-
Draft, draft-ietf-nvo3-bfd-geneve-05, 11 November 2021,
<https://www.ietf.org/archive/id/draft-ietf-nvo3-bfd-
geneve-05.txt>.
[RFC2119] Bradner, S., "Key words for use in RFCs to Indicate
Requirement Levels", BCP 14, RFC 2119,
DOI 10.17487/RFC2119, March 1997,
<https://www.rfc-editor.org/info/rfc2119>.
[RFC8174] Leiba, B., "Ambiguity of Uppercase vs Lowercase in RFC
2119 Key Words", BCP 14, RFC 8174, DOI 10.17487/RFC8174,
May 2017, <https://www.rfc-editor.org/info/rfc8174>.
[RFC8762] Mirsky, G., Jun, G., Nydell, H., and R. Foote, "Simple
Two-Way Active Measurement Protocol", RFC 8762,
DOI 10.17487/RFC8762, March 2020,
<https://www.rfc-editor.org/info/rfc8762>.
[RFC8926] Gross, J., Ed., Ganga, I., Ed., and T. Sridhar, Ed.,
"Geneve: Generic Network Virtualization Encapsulation",
RFC 8926, DOI 10.17487/RFC8926, November 2020,
<https://www.rfc-editor.org/info/rfc8926>.
[RFC8972] Mirsky, G., Min, X., Nydell, H., Foote, R., Masputra, A.,
and E. Ruffini, "Simple Two-Way Active Measurement
Protocol Optional Extensions", RFC 8972,
DOI 10.17487/RFC8972, January 2021,
<https://www.rfc-editor.org/info/rfc8972>.
8.2. Informative References
[I-D.ietf-nvo3-geneve-oam]
Mirsky, G., Boutros, S., Black, D., and S. Pallagatti,
"OAM for use in GENEVE", Work in Progress, Internet-Draft,
draft-ietf-nvo3-geneve-oam-03, 8 November 2021,
<https://www.ietf.org/archive/id/draft-ietf-nvo3-geneve-
oam-03.txt>.
Authors' Addresses
Xiao Min
ZTE Corp.
Nanjing
China
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Phone: +86 25 88013062
Email: xiao.min2@zte.com.cn
Greg Mirsky
Ericsson
United States of America
Email: gregimirsky@gmail.com
Santosh Pallagatti
VMware
Email: santosh.pallagatti@gmail.com
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