NVO3 Working Group X. Min
Internet-Draft G. Mirsky
Intended status: Standards Track ZTE Corp.
Expires: November 22, 2020 S. Pallagatti
VMware
May 21, 2020
Performance Measurement for Geneve
draft-xiao-nvo3-pm-geneve-01
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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Table of Contents
1. Introduction . . . . . . . . . . . . . . . . . . . . . . . . 2
2. Conventions Used in This Document . . . . . . . . . . . . . . 2
2.1. Terminology . . . . . . . . . . . . . . . . . . . . . . . 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 Headers . . . . . . . 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. Normative References . . . . . . . . . . . . . . . . . . . . 8
Authors' Addresses . . . . . . . . . . . . . . . . . . . . . . . 8
1. Introduction
"Generic Network Virtualization Encapsulation" (Geneve)
[I-D.ietf-nvo3-geneve] 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 [RFC8762] to enable measuring the performance of the path
between two Geneve tunnel endpoints.
Analogous to [I-D.xiao-nvo3-bfd-geneve], in this document, NVE
(Network Virtualization Edge) represents the Geneve tunnel endpoint,
TS (Tenant System) represents the physical or virtual device attached
to a Geneve tunnel endpoint from the outside, and VAP (Virtual Access
Point) represents the NVE side of the interface between the NVE and
the TS.
2. Conventions Used in This Document
2.1. Terminology
Geneve: Generic Network Virtualization Encapsulation
NVE: Network Virtualization Edge
PM: Performance Measurement
STAMP: Simple Two-way Active Measurement Protocol
TS: Tenant System
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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:
o with Ethernet and IP/UDP encapsulation;
o 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.
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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 IP/UDP headers.
The inner Ethernet frame carrying the STAMP Test Packet has the
following format:
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The Ethernet header and IP header are encoded as defined in
Section 3.1 of [I-D.xiao-nvo3-bfd-geneve].
The destination UDP port MUST be set the well-known port 862 as
defined in [RFC8762].
The STAMP Test Packet SHOULD be unauthenticated STAMP Session-Sender
test packet or unauthenticated STAMP Session-Reflector test packet.
The STAMP Test Packet is encoded as specified in [RFC8762] and
[I-D.ietf-ippm-stamp-option-tlv].
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.xiao-nvo3-bfd-geneve].
3.2. PM Encapsulation With Inner IP/UDP Headers
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.
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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 Message With the Inner IP/UDP
Header
A 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.xiao-nvo3-bfd-geneve].
The destination UDP port MUST be set the well-known port 862 as
defined in [RFC8762].
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The STAMP Test Packet SHOULD be unauthenticated STAMP Session-Sender
test packet or unauthenticated STAMP Session-Reflector test packet.
The STAMP Test Packet is encoded as specified in [RFC8762] and
[I-D.ietf-ippm-stamp-option-tlv].
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.xiao-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.xiao-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 PM sessions for the same VNI
may be running between two NVEs, so there needs to be a mechanism for
demultiplexing received PM packets to the proper session.
If the PM packet is received with STAMP Session Identifier equals to
0, the procedure for demultiplexing the received PM 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.xiao-nvo3-bfd-geneve].
If the PM packet is received with a non-zero STAMP Session
Identifier, then PM session MUST be demultiplexed only with STAMP
Session Identifier 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 normative
references.
6. IANA Considerations
This document has no IANA action requested.
7. Acknowledgements
TBA.
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8. Normative References
[I-D.ietf-ippm-stamp-option-tlv]
Mirsky, G., Xiao, M., Nydell, H., Foote, R., Masputra, A.,
and E. Ruffini, "Simple Two-way Active Measurement
Protocol Optional Extensions", draft-ietf-ippm-stamp-
option-tlv-04 (work in progress), March 2020.
[I-D.ietf-nvo3-geneve]
Gross, J., Ganga, I., and T. Sridhar, "Geneve: Generic
Network Virtualization Encapsulation", draft-ietf-
nvo3-geneve-16 (work in progress), March 2020.
[I-D.xiao-nvo3-bfd-geneve]
Xiao, M., Mirsky, G., and J. Networks, "BFD for Geneve",
draft-xiao-nvo3-bfd-geneve-02 (work in progress), February
2020.
[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>.
Authors' Addresses
Xiao Min
ZTE Corp.
Nanjing
China
Phone: +86 25 88013062
Email: xiao.min2@zte.com.cn
Greg Mirsky
ZTE Corp.
USA
Email: gregimirsky@gmail.com
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Santosh Pallagatti
VMware
Email: santosh.pallagatti@gmail.com
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