IEEE 802.1AX-2020: Link Aggregation标准详解
需积分: 9 183 浏览量
更新于2024-07-09
收藏 4.65MB PDF 举报
"8021AX-2020.pdf - IEEE Standard for Local and Metropolitan Area Networks—Link Aggregation (Revision of IEEE Std 802.1AX-2014)"
本文将详细介绍802.1AX-2020标准，即用于局域网和城域网的链路聚合标准，这是对2014年版本的更新。链路聚合（Link Aggregation）是一种网络技术，旨在提高网络带宽、提供链路冗余和增强网络的可靠性。它允许多条物理链路被聚合在一起作为一个逻辑链接，从而增加总的链路带宽，并通过分散负载来防止单点故障。
802.1AX标准由IEEE计算机学会的局域网/城域网标准委员会制定。该标准在2020年1月30日得到了IEEE-SA标准委员会的批准。这个版本的更新可能包括了对原标准的改进、技术增强和错误修正，以适应不断变化的网络环境和技术需求。
在802.1AX-2020中，主要关注的是跨设备链路聚合（Distributed Resilient Network Interface，DRNI）。这种技术允许不同网络设备间的多个接口形成一个聚合组，以实现更高效的数据传输和更可靠的连接。DRNI有助于提高网络的性能和可用性，尤其在数据中心、企业网络以及服务提供商网络中应用广泛。
802.1AX标准支持两种链路聚合模式：静态聚合（Static Aggregation）和动态聚合（Dynamic Aggregation）。静态聚合是由网络管理员手动配置，而动态聚合则依赖于协议（如LACP，Link Aggregation Control Protocol）来自动协商和管理链路聚合组的成员关系。这些协议帮助确保当一个链路故障时，数据流可以无缝地转移到其他活动链路上，从而保持网络的连续性。
此外，该标准还涉及了负载均衡算法，确保数据包在聚合链路中的分布公平，避免单个链路过载。同时，它还考虑了流量控制和拥塞管理，以优化网络资源的利用并减少丢包。
802.1AX标准的实施对于构建高性能、高可用性的网络架构至关重要，它简化了网络设计，减少了网络复杂性，并提供了对不断增加的网络流量需求的扩展能力。通过理解并应用这个标准，网络工程师可以更好地设计和维护他们的网络基础设施，确保服务的稳定性和用户的满意度。
802.1AX-2020是网络业界的一个重要标准，它定义了链路聚合技术的规范，增强了网络的带宽、冗余和可靠性。无论是对网络设备制造商还是网络管理员，熟悉和掌握这个标准都是至关重要的。
15
Copyright © 2020 IEEE. All rights reserved.
Figures
Figure 6-1 Architectural positioning of Link Aggregation sublayer ................................................. 29
Figure 6-2 Protocol Parser state diagram........................................................................................... 31
Figure 6-3 Link Aggregation sublayer block diagram....................................................................... 32
Figure 6-4 Frame Collector state diagram ......................................................................................... 36
Figure 6-5 Frame Distributor state diagram ...................................................................................... 37
Figure 6-6 Aggregator Parser state diagram ...................................................................................... 41
Figure 6-7 Aggregator Multiplexer state diagram ............................................................................. 42
Figure 6-8 LACPDU structure........................................................................................................... 54
Figure 6-9 Bit encoding of the Actor_State and Partner_State fields................................................ 55
Figure 6-10 Port Algorithm TLV......................................................................................................... 57
Figure 6-11 Port Conversation Link Digest TLV................................................................................ 58
Figure 6-12 Port Conversation Service Digest TLV ........................................................................... 58
Figure 6-13 LACP state machine overview......................................................................................... 59
Figure 6-14 LACP Receive state diagram ........................................................................................... 73
Figure 6-15 Selection of Aggregators.................................................................................................. 78
Figure 6-16 Mux state diagram............................................................................................................ 79
Figure 6-17 LACP Transmit state diagram.......................................................................................... 81
Figure 6-18 Marker protocol time sequence diagram.......................................................................... 83
Figure 6-19 Marker PDU and Marker Response PDU structure ......................................................... 84
Figure 6-20 Marker Responder state diagram ..................................................................................... 86
Figure 6-21 Conversation-Sensitive Collection and Distribution overview........................................ 88
Figure 6-22 Distribution algorithm information flow.......................................................................... 91
Figure 6-23 Update Mask state diagram............................................................................................ 101
Figure 6-24 Dual-homed System examples....................................................................................... 105
Figure 7-1 Link aggregation entity relationship diagram ................................................................ 109
Figure 8-1 Distribution algorithm identifiers................................................................................... 148
Figure 9-1 A DRNI .......................................................................................................................... 153
Figure 9-2 Transmission and reception via the IRC ........................................................................ 154
Figure 9-3 DRNI with dedicated IRC Link ..................................................................................... 155
Figure 9-4 DRNI with dedicated IRC LAG..................................................................................... 155
Figure 9-5 DRNI end station attach................................................................................................. 156
Figure 9-6 DRNI network attach ..................................................................................................... 156
Figure 9-7 DRNI Gateway block diagram....................................................................................... 159
Figure 9-8 DR_Gateway state machine ........................................................................................... 163
Figure 9-9 DR_Aggregator state machine ....................................................................................... 164
Figure 9-10 DR_IRP state machine ................................................................................................... 165
Figure 9-11 Basic TLV format .......................................................................................................... 171
Figure 9-12 DRCPDU structure ........................................................................................................ 172
Figure 9-13 Bit encoding of the Home_IRP_State and Neighbor_IRP_State fields ......................... 173
Figure 9-14 Aggregator State TLV.................................................................................................... 174
Figure 9-15 Bit encoding of the Aggregator_CSCD_State fields ..................................................... 175
Figure 9-16 Gateway State TLV........................................................................................................ 176
Figure 9-17 Gateway Preference TLV............................................................................................... 176
Figure 9-18 Organization-Specific TLV............................................................................................ 177
Figure 9-19 DRCP state machine overview ...................................................................................... 178
Figure 9-20 DRCP Receive machine state diagram .......................................................................... 195
Figure 9-21 Distributed Relay machine state diagram ...................................................................... 197
Figure 9-22 DRNI Gateway and Aggregator machine state diagram................................................ 198
Figure 9-23 DRCP Transmit state diagram ....................................................................................... 199
Figure B-1 Link aggregation topology examples............................................................................. 217
Figure C-1 Example 1 ...................................................................................................................... 221
Authorized licensed use limited to: feng feng. Downloaded on June 27,2021 at 10:27:36 UTC from IEEE Xplore. Restrictions apply.
剩余332页未读，继续阅读
2021-12-19 上传
2023-04-28 上传
2021-12-19 上传
2021-02-09 上传
2023-04-28 上传
2021-11-27 上传
feng2008ao
- 粉丝: 3
- 资源: 4
我的内容管理
展开
最新资源
- 火炬连体网络在MNIST的2D嵌入实现示例
- Angular插件增强Application Insights JavaScript SDK功能
- 实时三维重建：InfiniTAM的ros驱动应用
- Spring与Mybatis整合的配置与实践
- Vozy前端技术测试深入体验与模板参考
- React应用实现语音转文字功能介绍
- PHPMailer-6.6.4: PHP邮件收发类库的详细介绍
- Felineboard：为猫主人设计的交互式仪表板
- PGRFileManager：功能强大的开源Ajax文件管理器
- Pytest-Html定制测试报告与源代码封装教程
- Angular开发与部署指南：从创建到测试
- BASIC-BINARY-IPC系统：进程间通信的非阻塞接口
- LTK3D: Common Lisp中的基础3D图形实现
- Timer-Counter-Lister:官方源代码及更新发布
- Galaxia REST API：面向地球问题的解决方案
- Node.js模块：随机动物实例教程与源码解析
