Internet DRAFT - draft-tan-detnet-cap-discovery
draft-tan-detnet-cap-discovery
detnet Working Group L. Zhang
Internet-Draft H. Huang
Intended status: Standards Track T. Zhou
Expires: 21 August 2024 Huawei
18 February 2024
Echo Request/Reply for DetNet Capability Discovery
draft-tan-detnet-cap-discovery-01
Abstract
This document describes an extension to the echo request/reply
mechanisms used in IP, MPLS or other DetNet data plane environments,
which can be used within the DetNet domain, allowing the ping
initiator node to discover the enabled DetNet capabilities of each
relay node of detnet service-sub layer, which including discovering
DetNet relay nodes, collecting DetNet service sub-layer specific
information from DetNet relay nodes, as well as discovering the
locations of PREOF functions.
Status of This Memo
This Internet-Draft is submitted in full conformance with the
provisions of BCP 78 and BCP 79.
Internet-Drafts are working documents of the Internet Engineering
Task Force (IETF). Note that other groups may also distribute
working documents as Internet-Drafts. The list of current Internet-
Drafts is at https://datatracker.ietf.org/drafts/current/.
Internet-Drafts are draft documents valid for a maximum of six months
and may be updated, replaced, or obsoleted by other documents at any
time. It is inappropriate to use Internet-Drafts as reference
material or to cite them other than as "work in progress."
This Internet-Draft will expire on 21 August 2024.
Copyright Notice
Copyright (c) 2024 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
Provisions Relating to IETF Documents (https://trustee.ietf.org/
license-info) in effect on the date of publication of this document.
Please review these documents carefully, as they describe your rights
and restrictions with respect to this document. Code Components
Zhang, et al. Expires 21 August 2024 [Page 1]
Internet-Draft Echo Request/Reply for DetNet Capability February 2024
extracted from this document must include Revised BSD License text as
described in Section 4.e of the Trust Legal Provisions and are
provided without warranty as described in the Revised BSD License.
Table of Contents
1. Introduction . . . . . . . . . . . . . . . . . . . . . . . . 2
1.1. Requirements Language . . . . . . . . . . . . . . . . . . 3
1.2. Terminology . . . . . . . . . . . . . . . . . . . . . . . 3
2. DetNet Capability Discovery . . . . . . . . . . . . . . . . . 3
2.1. DetNet Capability Discovery Operation . . . . . . . . . . 4
2.2. DetNet Capability Discovery Header . . . . . . . . . . . 4
2.3. DetNet Capabilities Discovery Objects . . . . . . . . . . 4
2.3.1. DetNet Capability Object . . . . . . . . . . . . . . 4
2.3.2. DetNet Relay Node Identifier Object . . . . . . . . . 5
2.3.3. DetNet service protection function objects . . . . . 6
2.3.4. DetNet Service Flow Information Objects . . . . . . . 8
2.4. DetNet Data Plane Considerations . . . . . . . . . . . . 12
2.4.1. MPLS Data Plane . . . . . . . . . . . . . . . . . . . 12
2.4.2. IP Data Plane . . . . . . . . . . . . . . . . . . . . 13
3. IANA Considerations . . . . . . . . . . . . . . . . . . . . . 13
4. Security Considerations . . . . . . . . . . . . . . . . . . . 13
5. References . . . . . . . . . . . . . . . . . . . . . . . . . 13
5.1. Normative References . . . . . . . . . . . . . . . . . . 13
5.2. Informative References . . . . . . . . . . . . . . . . . 14
Acknowledgements . . . . . . . . . . . . . . . . . . . . . . . . 14
Authors' Addresses . . . . . . . . . . . . . . . . . . . . . . . 14
1. Introduction
[RFC8655] provides the overall architecture for Deterministic
Networking (DetNet), which provides a capability to carry specified
unicast or multicast data flows for real-time applications with
extremely low data loss rates and bounded latency within a network
domain. Currently DetNet operates on IP and MPLS data plane.
DetNet functionality is divided into two sub-layers. The DetNet
service sub-layer provides DetNet service protection with
functionalities and operation of PREOF, a collective name for Packet
Replication, Elimination, and Ordering Functions. The DetNet
forwarding sub-layer provides resource allocation for DetNet flows
over paths provided by the underlying network.
[I-D.ietf-detnet-oam-framework] details the specific requirements of
the Operation, Administration, and Maintenance (OAM) recommended to
maintain a deterministic network. OAM for the DetNet MPLS data plane
is described in [I-D.ietf-detnet-mpls-oam] and OAM for the DetNet IP
data plane is described in [I-D.ietf-detnet-ip-oam].
Zhang, et al. Expires 21 August 2024 [Page 2]
Internet-Draft Echo Request/Reply for DetNet Capability February 2024
[I-D.ietf-detnet-oam-framework] described the DetNet service sub-
layer oam requirements of discovering DetNet relay nodes , collecting
DetNet service sub-layer specific (e.g., configuration/operation/
status) information from DetNet relay nodes, as well as discovering
the locations of PREOF functions.
These requirements, could be satisfied using alternative technologies
like NETCONF/YANG, IGP flooding or ping/traceroute.
[I-D.varga-detnet-service-sub-layer-oam] introduced a ping/traceroute
method, "DetNet Ping", and mentions that it could be used for
discovering DetNet capabilities of DetNet relay nodes.
This document introduced extensions to DetNet Ping (echo request/
reply) used in IP, MPLS or other DetNet data plane environments,
which can be used within the DetNet domain, allowing the ping
initiator node to discover the enabled DetNet capabilities of each
relay node of detnet service-sub layer.
1.1. 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.
1.2. Terminology
The abbreviations used in this document are:
DetNet: Deterministic Networking
OAM: Operation, Administration, and Maintenance
PRF: Packet Replication Function
PEF: Packet Elimination Function
POF: Packet Ordering Function
PREOF: Packet Replication, Elimination and Ordering Function
2. DetNet Capability Discovery
Zhang, et al. Expires 21 August 2024 [Page 3]
Internet-Draft Echo Request/Reply for DetNet Capability February 2024
2.1. DetNet Capability Discovery Operation
Once the DetNet PING initiator node is triggered to discover the
enabled DetNet capabilities of each DetNet relay node, the initiator
node will send DetNet echo requests that include the DetNet
Capabilities Discovery Header.
First, with TTL equal to 1 to reach the closest node, which may be an
DetNet relay node or not. Then with TTL equal to 2 to reach the
second nearest node, which also may be an DetNet relay node or not.
And further, increasing by 1 the TTL every time the initiator node
sends a new echo request. As a result, the echo requests sent by the
initiator node will reach all nodes one by one along the transport
path of DetNet service flow.
Alternatively, if the initiator node knows precisely all the DetNet
relay nodes beforehand, once the initiator node is triggered to
discover the enabled DetNet capabilities, it can send an echo request
to each DetNet relay node directly, without TTL expiration.
2.2. DetNet Capability Discovery Header
For echo DetNet request/reply message used for DetNet capability
discovery, DetNet capabilities information are delivered by several
kinds of DetNet Capabilities Discovery Objects. This document
introduces an abstract header which has the corresponding format
depending on the type of DetNet data plane. The format of DetNet
Capabilities Discovery Object is shown as below.
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
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
. .
. DetNet Capabilities Discovery Header .
. .
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
. .
. DetNet Capabilities Discovery Data .
. .
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
Figure 1: The Format of Mandatory Section of A BFD Control Packet
DetNet Capabilities Discovery Header: abstract header of DetNet Capabilities Discovery Object, with varied length and format depending on the type of DetNet data plane.
DetNet Capabilities Discovery Data: detailed information of DetNet Capabilities Discovery Object, with fixed length and format depending on the type of Detnet capability.
2.3. DetNet Capabilities Discovery Objects
2.3.1. DetNet Capability Object
Zhang, et al. Expires 21 August 2024 [Page 4]
Internet-Draft Echo Request/Reply for DetNet Capability February 2024
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
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
. .
. DetNet Capabilities Discovery Header .
. .
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| DetNet Capability Flags |S|F|I|O|
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
Figure 2: DetNet Capability Object Format
Flags (4 bytes): DetNet Capability Flags
* S: Service sub-layer capability
* F: Forwarding sub-layer capability
* I: Incoming flow configuration
* O: Outgoing flow configuration
2.3.2. DetNet Relay Node Identifier Object
2.3.2.1. DetNet Node Identifier Object (MPLS)
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
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
. .
. DetNet Capabilities Discovery Header .
. .
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Node ID | RESERVED | OP |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
Figure 3: DetNet Node Identifier Object (MPLS) Format
Node ID (20 bits): The value of the Node ID field identifies the DetNet node that originated the packet. It is same as defined in {{I-D.ietf-detnet-mpls-oam}}.
OP (3 bits): Service operation on the node.
0x00: No operation for DetNet service sub-layer
0x01: Initiation for DetNet service sub-layer encapsulation
0x02: Termination for DetNet service sub-layer encapsulation
0x03: Relay(Swap) operation for DetNet service sub-layer
2.3.2.2. DetNet Node Identifier Object (IPv4)
Zhang, et al. Expires 21 August 2024 [Page 5]
Internet-Draft Echo Request/Reply for DetNet Capability February 2024
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
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
. .
. DetNet Capabilities Discovery Header .
. .
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| IPv4 address (4 bytes) |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Prefix Length | RESERVED | OP |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
Figure 4: DetNet Node Identifier Object (IPv4) Format
IPv4 address(4 bytes): An IPv4 address. This address is treated as a prefix based on the prefix length value.
Prefix length(1 bytes): Length in bits of the IPv4 prefix.
OP (3 bits): Service operation on the node.
0x00: No operation for DetNet service sub-layer
0x01: Initiation for DetNet service sub-layer encapsulation
0x02: Termination for DetNet service sub-layer encapsulation
0x03: Relay(Swap) operation for DetNet service sub-layer
2.3.2.3. DetNet Node Identifier Object (IPv6)
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
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
. .
. DetNet Capabilities Discovery Header .
. .
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| IPv6 address (16 bytes) |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Prefix Length | RESERVED | OP |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
Figure 5: DetNet Node Identifier Object (IPv6) Format
IPv6 address: An IPv6 address. This address is treated as a prefix based on the prefix length value.
Prefix length: Length in bits of the IPv6 prefix.
OP (3 bits): Service operation on the node.
0x00: No operation for DetNet service sub-layer
0x01: Initiation for DetNet service sub-layer encapsulation
0x02: Termination for DetNet service sub-layer encapsulation
0x03: Relay(Swap) operation for DetNet service sub-layer
2.3.3. DetNet service protection function objects
Zhang, et al. Expires 21 August 2024 [Page 6]
Internet-Draft Echo Request/Reply for DetNet Capability February 2024
2.3.3.1. Service Protection Object
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
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
. .
. DetNet Capabilities Discovery Header .
. .
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| flags | OP |SL |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
Figure 6: Service Protection Object Format
flags (4 bytes): service protection flags.
* SL (2 bits): Sequence number length.
0b00: no sequence number
0b01: sequence number length of 16 bits
0b10: sequence number length of 28 bits
2.3.3.2. Replication Capability Object
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
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
. .
. DetNet Capabilities Discovery Header .
. .
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| flags |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
Figure 7: Replication Capability Object Format
Flags (4 bytes): unused.
2.3.3.3. Elimination Capability Object
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
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
. .
. DetNet Capabilities Discovery Header .
. .
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| flags |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
Zhang, et al. Expires 21 August 2024 [Page 7]
Internet-Draft Echo Request/Reply for DetNet Capability February 2024
Figure 8: Elimination Capability Object Format
Flags (4 bytes): unused.
2.3.3.4. Ordering Capability Object
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
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
. .
. DetNet Capabilities Discovery Header .
. .
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| flags |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
Figure 9: Ordering Capability Object Format
Flags (4 bytes): unused.
2.3.4. DetNet Service Flow Information Objects
2.3.4.1. DetNet Service Flow Identifier Object (MPLS)
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
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
. .
. DetNet Capabilities Discovery Header .
. .
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Flags |P|I|O|
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
Figure 10: DetNet Service Flow Identifier Object Format
Flags (4 bytes):
* I: Incoming flow
* O: Outgoing flow
* P: platform-label-space
2.3.4.2. Service Label Object
Zhang, et al. Expires 21 August 2024 [Page 8]
Internet-Draft Echo Request/Reply for DetNet Capability February 2024
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
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
. .
. DetNet Capabilities Discovery Header .
. .
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Service Label |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
Figure 11: Service Label Object Format
Service Label (4 bytes): S-Label, DetNet Service identifier with MPLS data plane.
2.3.4.3. DetNet Service Flow Identifier Object (IPv4)
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
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
. .
. DetNet Capabilities Discovery Header .
. .
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Flags |S|A|I|O|
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
Figure 12: DetNet Service Flow Identifier Object (IPv4) Object Format
Flags (4 bytes):
* I: Incoming flow
* O: Outgoing flow
* A: IPv4 flow identifier, including Source Address, Destination Address, Source Port, Destination Port, Protocol and Dscp
* S: IPSec-spi
2.3.4.4. IPv4 Flow Identifier Object
Zhang, et al. Expires 21 August 2024 [Page 9]
Internet-Draft Echo Request/Reply for DetNet Capability February 2024
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
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
. .
. DetNet Capabilities Discovery Header .
. .
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Source Address |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Destination Address |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Source Port | Destination Port |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Protocol | Dscp | RESERVED |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
Figure 13: IPv4 Flow Identifier Object Format
Source Address (4 bytes): IPv4 source address of the packet.
Destination Address (4 bytes): IPv4 destination address of the packet.
Source Port (2 bytes): Source port of the packet.
Destination Port (2 bytes): Destination port of the packet.
Protocol (1 byte): Protocol of the packet.
Dscp (1 byte): Differentiated Services Code Point.
2.3.4.5. DetNet Service Flow Identifier Object (IPv6)
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
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
. .
. DetNet Capabilities Discovery Header .
. .
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Flags |L|S|A|I|O|
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
Figure 14: DetNet Service Flow Identifier Object (IPv6) Object Format
Flags (4 bytes):
* I: Incoming flow
* O: Outgoing flow
* A: IPv6 flow identifier, including Source Address, Destination Address, Source Port, Destination Port, Protocol and Dscp
* S: IPSec-spi
* L: IPv6 flow label
2.3.4.6. IPv6 Flow Identifier Object
Zhang, et al. Expires 21 August 2024 [Page 10]
Internet-Draft Echo Request/Reply for DetNet Capability February 2024
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
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
. .
. DetNet Capabilities Discovery Header .
. .
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
+ +
| |
+ Source Address +
| |
+ +
| |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| |
+ +
| |
+ Destination Address +
| |
+ +
| |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Source Port | Destination Port |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Protocol | Dscp | RESERVED |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
Figure 15: IPv6 Flow Identifier Object Format
Source Address (16 bytes): IPv6 source address of the packet.
Destination Address (16 bytes): IPv6 destination address of the packet.
Source Port (2 bytes): Source port of the packet.
Destination Port (2 bytes): Destination port of the packet.
Protocol (1 byte): Protocol of the packet.
Dscp (1 byte): Differentiated Services Code Point.
2.3.4.7. IPv6 Flow Label Object
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
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
. .
. DetNet Capabilities Discovery Header .
. .
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| IPv6 Flow Label |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
Zhang, et al. Expires 21 August 2024 [Page 11]
Internet-Draft Echo Request/Reply for DetNet Capability February 2024
Figure 16: IPv6 Flow Label Object Format
IPv6 Flow Label (4 bytes): The flow label value of the header. IPv6 only.
2.3.4.8. IPSec-SPI Object
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
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
. .
. DetNet Capabilities Discovery Header .
. .
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| IPsec Security Parameters Index |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
Figure 17: IPSec-SPI Object Format
IPSec-SPI (4 bytes): IPsec Security Parameters Index
2.4. DetNet Data Plane Considerations
2.4.1. MPLS Data Plane
DetNet echo request/reply messages in MPLS data plane, could
encapsulate DetNet Capabilities Discovery Objects with typical TLV
header format in place of the "DetNet Capabilities Discovery Header",
as defined in {#detnet-cap-disc-obj}. The values of tlv types had not
been defined yet.
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
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Type | Length |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
Figure 18: MPLS TLV Header Format
Type (2 bytes): Tlv type
Length (2 bytes): Tlv Length
Zhang, et al. Expires 21 August 2024 [Page 12]
Internet-Draft Echo Request/Reply for DetNet Capability February 2024
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
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Type | Length |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
. .
. DetNet Capabilities Discovery Data .
. .
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
Figure 19: DetNet Capabilities Discovery Object (MPLS) Format
2.4.2. IP Data Plane
TBD.
3. IANA Considerations
NA.
4. Security Considerations
The security considerations described in [RFC8655] apply to the
extensions defined in this document as well. This document does not
raise new security issues.
5. References
5.1. Normative References
[RFC8655] Finn, N., Thubert, P., Varga, B., and J. Farkas,
"Deterministic Networking Architecture", RFC 8655,
DOI 10.17487/RFC8655, October 2019,
<https://www.rfc-editor.org/rfc/rfc8655>.
[I-D.ietf-detnet-oam-framework]
Mirsky, G., Theoleyre, F., Papadopoulos, G. Z., Bernardos,
C. J., Varga, B., and J. Farkas, "Framework of Operations,
Administration and Maintenance (OAM) for Deterministic
Networking (DetNet)", Work in Progress, Internet-Draft,
draft-ietf-detnet-oam-framework-11, 8 January 2024,
<https://datatracker.ietf.org/doc/html/draft-ietf-detnet-
oam-framework-11>.
[I-D.ietf-detnet-mpls-oam]
Mirsky, G., Chen, M., and B. Varga, "Operations,
Administration and Maintenance (OAM) for Deterministic
Networks (DetNet) with MPLS Data Plane", Work in Progress,
Zhang, et al. Expires 21 August 2024 [Page 13]
Internet-Draft Echo Request/Reply for DetNet Capability February 2024
Internet-Draft, draft-ietf-detnet-mpls-oam-15, 12 January
2024, <https://datatracker.ietf.org/doc/html/draft-ietf-
detnet-mpls-oam-15>.
[I-D.ietf-detnet-ip-oam]
Mirsky, G., Chen, M., and D. L. Black, "Operations,
Administration, and Maintenance (OAM) for Deterministic
Networks (DetNet) with IP Data Plane", Work in Progress,
Internet-Draft, draft-ietf-detnet-ip-oam-13, 14 February
2024, <https://datatracker.ietf.org/doc/html/draft-ietf-
detnet-ip-oam-13>.
[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/rfc/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/rfc/rfc8174>.
5.2. Informative References
[I-D.varga-detnet-service-sub-layer-oam]
Varga, B., Farkas, J., and G. Mirsky, "Deterministic
Networking (DetNet): OAM Functions for The Service Sub-
Layer", Work in Progress, Internet-Draft, draft-varga-
detnet-service-sub-layer-oam-03, 25 July 2022,
<https://datatracker.ietf.org/doc/html/draft-varga-detnet-
service-sub-layer-oam-03>.
Acknowledgements
Authors' Addresses
Li Zhang
Huawei
China
Email: zhangli344@huawei.com
Hongyi Huang
Huawei
China
Email: hongyi.huang@huawei.com
Zhang, et al. Expires 21 August 2024 [Page 14]
Internet-Draft Echo Request/Reply for DetNet Capability February 2024
Tianran Zhou
Huawei
China
Email: zhoutianran@huawei.com
Zhang, et al. Expires 21 August 2024 [Page 15]
