IEEE 802.1AX-2020

$152.21

IEEE Standard for Local and Metropolitan Area Networks–Link Aggregation

Published By	Publication Date	Number of Pages
IEEE	2020

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Category: IEEE

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Description

Revision 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
1	IEEE Std 802.1AX™-2020 front cover
2	Title page
4	Important Notices and Disclaimers Concerning IEEE Standards Documents
7	Participants
9	Introduction
10	Contents
16	Figures
18	Tables
19	1. Overview 1.1 Scope 1.2 Purpose
20	1.3 State diagram conventions
21	2. Normative references
22	3. Definitions
25	4. Acronyms and abbreviations
26	5. Conformance 5.1 Requirements terminology 5.2 Protocol implementation conformance statement 5.3 Link Aggregation
27	5.3.2 Link Aggregation options 5.4 Distributed Resilient Network Interconnect (DRNI)
28	5.4.2 DRNI options
29	6. Link Aggregation 6.1 Overview 6.1.1 Goals and objectives
30	6.1.2 Positioning of Link Aggregation within the IEEE 802 architecture 6.1.3 Protocol Parser/Multiplexer
32	6.2 Link Aggregation operation
34	6.2.1 Principles of Link Aggregation
35	6.2.2 Service interfaces 6.2.3 Frame Collector
37	6.2.4 Frame Distributor
38	6.2.5 Marker Generator/Receiver (optional)
39	6.2.6 Marker Responder 6.2.7 Aggregator Parser/Multiplexer
43	6.2.8 Aggregator
44	6.2.9 LACP Parser/Multiplexer 6.2.10 Addressing
45	6.3 Link Aggregation Control
46	6.3.1 Characteristics of Link Aggregation Control
47	6.3.2 System identification 6.3.3 Aggregator identification 6.3.4 Port identification
48	6.3.5 Capability identification
49	6.3.6 Link Aggregation Group identification
50	6.3.7 Selecting a Link Aggregation Group 6.3.8 Agreeing on a Link Aggregation Group
51	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
52	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
53	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
54	6.4.2 LACPDU structure and encoding
60	6.4.3 LACP state machine overview
61	6.4.4 Constants
62	6.4.5 Variables associated with each Aggregator
64	6.4.6 Variables associated with each Aggregation Port
69	6.4.7 Variables used for managing the operation of the state machines
70	6.4.8 Functions
73	6.4.9 Timers 6.4.10 Messages 6.4.11 LACP Receive machine
75	6.4.12 Selection Logic
79	6.4.13 Mux machine
82	6.4.14 LACP Transmit machine
83	6.5 Marker protocol 6.5.1 Introduction
84	6.5.2 Sequence of operations 6.5.3 Marker and Marker Response PDU structure and encoding
86	6.5.4 Protocol definition
88	6.6 Conversation-Sensitive Collection and Distribution
90	6.6.1 Port Algorithms and Port Conversation IDs 6.6.2 Link numbers and link selection
91	6.6.3 Conversation-sensitive LACP
103	6.7 Configuration capabilities and restrictions 6.7.1 Use of system and port priorities
104	6.7.2 Dynamic allocation of operational Keys 6.7.3 Link Aggregation on shared-medium links
105	6.7.4 Selection Logic variants 6.7.5 LACP configuration for dual-homed Systems
107	7. Management 7.1 Overview 7.1.1 Systems management overview
108	7.1.2 Management model 7.2 Managed objects 7.2.1 Introduction
109	7.2.2 Overview of managed objects 7.2.3 Containment
110	7.2.4 Naming 7.2.5 Capabilities
115	7.3 Management for Link Aggregation 7.3.1 Aggregator managed object class
126	7.3.2 Aggregation Port managed object class
134	7.3.3 Aggregation Port Statistics managed object class
135	7.3.4 Aggregation Port Debug Information managed object class
138	7.4 Management for Distributed Resilient Network Interconnect 7.4.1 DRNI Managed Object Class
149	8. Distribution algorithms 8.1 Distribution algorithm identification
150	8.2 Per-Service Frame Distribution 8.2.1 Distribution based on C-VLAN Identifier (C-VID)
151	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
152	9. Distributed Resilient Network Interconnect 9.1 Goals
153	9.2 Distributed Relay operation
155	9.3 Intra-Relay Connection
156	9.4 Using DRNI 9.4.1 DRNI connectivity
158	9.4.2 DRNI fault recovery
159	9.4.3 DRNI configuration
160	9.5 DRNI Gateway
161	9.5.1 DRCP Parser/Multiplexer 9.5.2 DRNI Gateway Relay
166	9.5.3 DRNI Gateway Control
169	9.6 Distributed Relay Control Protocol
170	9.6.1 DRCPDU transmission, addressing, and protocol identification
171	9.6.2 DRCPDU structure and encoding
179	9.6.3 DRCP state machine overview
180	9.6.4 Constants 9.6.5 Variables associated with the DRNI Gateway
186	9.6.6 Variables used for managing the operation of the state machines
188	9.6.7 Functions
195	9.6.8 Timers 9.6.9 Messages
196	9.6.10 DRCP Receive machine
198	9.6.11 Distributed Relay machine
199	9.6.12 DRNI Gateway and Aggregator machine
200	9.6.13 DRCP Transmit machine
201	Annex A (normative) Protocol implementation conformance statement (PICS) proforma A.1 Introduction A.1.1 Abbreviations and special symbols
202	A.1.2 Instructions for completing the PICS proforma A.1.3 Additional information A.1.4 Exceptional information
203	A.1.5 Conditional items A.1.6 Identification
204	A.2 PICS proforma for Clause 6 A.2.1 Major capabilities/options
205	A.2.2 LLDP Port connectivity A.2.3 Protocol Parser/Multiplexer support A.2.4 Frame Collector A.2.5 Frame Distributor
206	A.2.6 Marker protocol A.2.7 Aggregator Parser/Multiplexer A.2.8 LACP Parser/Multiplexer
207	A.2.9 System identification A.2.10 Aggregator identification A.2.11 Port identification A.2.12 Capability identification
208	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
209	A.2.17 Selection Logic A.2.18 Mux machine
210	A.2.19 Transmit machine A.2.20 Marker protocol
211	A.2.21 Management
212	A.2.22 Per-Service Frame Distribution A.2.23 Conversation-sensitive frame collection and distribution
213	A.2.24 Configuration capabilities and restrictions A.2.25 Link Aggregation on shared-medium links
214	A.2.26 Distributed Resilient Network Interconnect A.2.27 DRCPDU structure
215	Annex B (informative) Collection and distribution algorithms B.1 Introduction
216	B.2 Port selection B.3 Dynamic reallocation of conversations to different Aggregation Ports
217	B.4 Topology considerations in the choice of distribution algorithm
219	Annex C (informative) LACP standby link selection and dynamic Key management C.1 Introduction C.2 Goals
220	C.3 Standby link selection C.4 Dynamic Key management C.5 A dynamic Key management algorithm
222	C.6 Example 1 C.7 Example 2
224	Annex D (normative) SMIv2 MIB definitions for Link Aggregation D.1 Introduction D.2 SNMP Management Framework D.3 Security considerations
225	D.4 Structure of the MIB module
226	D.4.1 Relationship to the managed objects defined in Clause 7
233	D.4.2 MIB Subtrees
234	D.5 Relationship to other MIBs D.5.1 Relationship to the Interfaces MIB D.5.2 Layering model
235	D.5.3 ifStackTable D.5.4 ifRcvAddressTable D.6 Definitions for Link Aggregation MIB
326	Annex E (informative) DRNI on Bridges E.1 DRNI on VLAN Bridges
327	E.2 DRNI on Provider Bridges and Provider Edge Bridges
328	E.3 DRNI on Backbone Edge Bridges
329	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
330	F.2.1 aggregation status F.2.2 aggregated Port ID F.2.3 Link Aggregation TLV usage rules
331	F.2.4 Use of other TLVs on an Aggregator or Aggregation Link
332	Annex G (informative) Bibliography
333	Back cover