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IEEE 8802-1AX-2021

IEEE 8802-1AX-2021

$115.38

IEEE/ISO/IEC International Standard – Telecommunications and exchange between information technology systems — Requirements for local and metropolitan area networks — Part 1AX: Link aggregation

Published By Publication Date Number of Pages
IEEE 2021 336
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Adoption Standard – Active. Link Aggregation allows parallel point-to-point links to be used as if they were a single link and also supports the use of multiple links as a resilient load-sharing interconnect between multiple nodes in two separately administered networks. This standard defines a MAC-independent Link Aggregation capability and provides general information relevant to specific MAC types.

PDF Catalog

PDF Pages PDF Title
5 Title page
7 Important Notices and Disclaimers Concerning IEEE Standards Documents
10 Participants
12 Introduction
13 Contents
19 Figures
21 Tables
22 1. Overview
1.1 Scope
1.2 Purpose
23 1.3 State diagram conventions
24 2. Normative references
25 3. Definitions
28 4. Acronyms and abbreviations
29 5. Conformance
5.1 Requirements terminology
5.2 Protocol implementation conformance statement
5.3 Link Aggregation
30 5.3.2 Link Aggregation options
5.4 Distributed Resilient Network Interconnect (DRNI)
31 5.4.2 DRNI options
32 6. Link Aggregation
6.1 Overview
6.1.1 Goals and objectives
33 6.1.2 Positioning of Link Aggregation within the IEEE 802 architecture
6.1.3 Protocol Parser/Multiplexer
35 6.2 Link Aggregation operation
37 6.2.1 Principles of Link Aggregation
38 6.2.2 Service interfaces
6.2.3 Frame Collector
40 6.2.4 Frame Distributor
41 6.2.5 Marker Generator/Receiver (optional)
42 6.2.6 Marker Responder
6.2.7 Aggregator Parser/Multiplexer
46 6.2.8 Aggregator
47 6.2.9 LACP Parser/Multiplexer
6.2.10 Addressing
48 6.3 Link Aggregation Control
49 6.3.1 Characteristics of Link Aggregation Control
50 6.3.2 System identification
6.3.3 Aggregator identification
6.3.4 Port identification
51 6.3.5 Capability identification
52 6.3.6 Link Aggregation Group identification
53 6.3.7 Selecting a Link Aggregation Group
6.3.8 Agreeing on a Link Aggregation Group
54 6.3.9 Attaching a link to an Aggregator
6.3.10 Signaling readiness to transfer user data
6.3.11 Enabling the Frame Collector and Frame Distributor
55 6.3.12 MAC_Operational status
6.3.13 Monitoring the membership of a Link Aggregation Group
6.3.14 Detaching a link from an Aggregator
56 6.3.15 Configuration and administrative control of Link Aggregation
6.3.16 Link Aggregation Control state information
6.4 Link Aggregation Control Protocol
6.4.1 LACP design elements
57 6.4.2 LACPDU structure and encoding
63 6.4.3 LACP state machine overview
64 6.4.4 Constants
65 6.4.5 Variables associated with each Aggregator
67 6.4.6 Variables associated with each Aggregation Port
72 6.4.7 Variables used for managing the operation of the state machines
73 6.4.8 Functions
76 6.4.9 Timers
6.4.10 Messages
6.4.11 LACP Receive machine
78 6.4.12 Selection Logic
82 6.4.13 Mux machine
85 6.4.14 LACP Transmit machine
86 6.5 Marker protocol
6.5.1 Introduction
87 6.5.2 Sequence of operations
6.5.3 Marker and Marker Response PDU structure and encoding
89 6.5.4 Protocol definition
91 6.6 Conversation-Sensitive Collection and Distribution
93 6.6.1 Port Algorithms and Port Conversation IDs
6.6.2 Link numbers and link selection
94 6.6.3 Conversation-sensitive LACP
106 6.7 Configuration capabilities and restrictions
6.7.1 Use of system and port priorities
107 6.7.2 Dynamic allocation of operational Keys
6.7.3 Link Aggregation on shared-medium links
108 6.7.4 Selection Logic variants
6.7.5 LACP configuration for dual-homed Systems
110 7. Management
7.1 Overview
7.1.1 Systems management overview
111 7.1.2 Management model
7.2 Managed objects
7.2.1 Introduction
112 7.2.2 Overview of managed objects
7.2.3 Containment
113 7.2.4 Naming
7.2.5 Capabilities
118 7.3 Management for Link Aggregation
7.3.1 Aggregator managed object class
129 7.3.2 Aggregation Port managed object class
137 7.3.3 Aggregation Port Statistics managed object class
138 7.3.4 Aggregation Port Debug Information managed object class
141 7.4 Management for Distributed Resilient Network Interconnect
7.4.1 DRNI Managed Object Class
152 8. Distribution algorithms
8.1 Distribution algorithm identification
153 8.2 Per-Service Frame Distribution
8.2.1 Distribution based on C-VLAN Identifier (C-VID)
154 8.2.2 Distribution based on S-VLAN Identifier (S-VID)
8.2.3 Distribution based on Backbone Service Instance Identifier (I-SID)
8.2.4 Distribution based on Traffic Engineering Service Instance Identifier (TE-SID)
8.2.5 Distribution based on Flow Hash
155 9. Distributed Resilient Network Interconnect
9.1 Goals
156 9.2 Distributed Relay operation
158 9.3 Intra-Relay Connection
159 9.4 Using DRNI
9.4.1 DRNI connectivity
161 9.4.2 DRNI fault recovery
162 9.4.3 DRNI configuration
163 9.5 DRNI Gateway
164 9.5.1 DRCP Parser/Multiplexer
9.5.2 DRNI Gateway Relay
169 9.5.3 DRNI Gateway Control
172 9.6 Distributed Relay Control Protocol
173 9.6.1 DRCPDU transmission, addressing, and protocol identification
174 9.6.2 DRCPDU structure and encoding
182 9.6.3 DRCP state machine overview
183 9.6.4 Constants
9.6.5 Variables associated with the DRNI Gateway
189 9.6.6 Variables used for managing the operation of the state machines
191 9.6.7 Functions
198 9.6.8 Timers
9.6.9 Messages
199 9.6.10 DRCP Receive machine
201 9.6.11 Distributed Relay machine
202 9.6.12 DRNI Gateway and Aggregator machine
203 9.6.13 DRCP Transmit machine
204 Annex A (normative) Protocol implementation conformance statement (PICS) proforma
A.1 Introduction
A.1.1 Abbreviations and special symbols
205 A.1.2 Instructions for completing the PICS proforma
A.1.3 Additional information
A.1.4 Exceptional information
206 A.1.5 Conditional items
A.1.6 Identification
207 A.2 PICS proforma for Clause 6
A.2.1 Major capabilities/options
208 A.2.2 LLDP Port connectivity
A.2.3 Protocol Parser/Multiplexer support
A.2.4 Frame Collector
A.2.5 Frame Distributor
209 A.2.6 Marker protocol
A.2.7 Aggregator Parser/Multiplexer
A.2.8 LACP Parser/Multiplexer
210 A.2.9 System identification
A.2.10 Aggregator identification
A.2.11 Port identification
A.2.12 Capability identification
211 A.2.13 Link Aggregation Group identification
A.2.14 Detaching a link from an Aggregator
A.2.15 LACPDU structure
A.2.16 Receive machine
212 A.2.17 Selection Logic
A.2.18 Mux machine
213 A.2.19 Transmit machine
A.2.20 Marker protocol
214 A.2.21 Management
215 A.2.22 Per-Service Frame Distribution
A.2.23 Conversation-sensitive frame collection and distribution
216 A.2.24 Configuration capabilities and restrictions
A.2.25 Link Aggregation on shared-medium links
217 A.2.26 Distributed Resilient Network Interconnect
A.2.27 DRCPDU structure
218 Annex B (informative) Collection and distribution algorithms
B.1 Introduction
219 B.2 Port selection
B.3 Dynamic reallocation of conversations to different Aggregation Ports
220 B.4 Topology considerations in the choice of distribution algorithm
222 Annex C (informative) LACP standby link selection and dynamic Key management
C.1 Introduction
C.2 Goals
223 C.3 Standby link selection
C.4 Dynamic Key management
C.5 A dynamic Key management algorithm
225 C.6 Example 1
C.7 Example 2
227 Annex D (normative) SMIv2 MIB definitions for Link Aggregation
D.1 Introduction
D.2 SNMP Management Framework
D.3 Security considerations
228 D.4 Structure of the MIB module
229 D.4.1 Relationship to the managed objects defined in Clause 7
236 D.4.2 MIB Subtrees
237 D.5 Relationship to other MIBs
D.5.1 Relationship to the Interfaces MIB
D.5.2 Layering model
238 D.5.3 ifStackTable
D.5.4 ifRcvAddressTable
D.6 Definitions for Link Aggregation MIB
329 Annex E (informative) DRNI on Bridges
E.1 DRNI on VLAN Bridges
330 E.2 DRNI on Provider Bridges and Provider Edge Bridges
331 E.3 DRNI on Backbone Edge Bridges
332 Annex F (normative) Link Aggregation and Link Layer Discovery Protocol
F.1 Positioning Link Layer Discovery Protocol (LLDP) relative to Link Aggregation
F.1.1 LLDP Parser/Multiplexer
F.2 Link Aggregation TLV
333 F.2.1 aggregation status
F.2.2 aggregated Port ID
F.2.3 Link Aggregation TLV usage rules
334 F.2.4 Use of other TLVs on an Aggregator or Aggregation Link
335 Annex G (informative) Bibliography

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