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AI 浪潮来袭,交换芯片迎来二次成长!国产替代迎来新机遇

AI 浪潮来袭,交换芯片迎来二次成长!国产替代迎来新机遇
在 AI 大模型飞速发展的当下,算力集群不断向万卡、十万卡级别扩张,作为数据中心互联核心组件的交换芯片,正在迎来全新的成长周期。交换芯片承担数据交换、报文转发的关键作用,成本占交换机整体30% 以上,是决定网络带宽、传输时延与整机性能的核心命脉。结合行业研报,今天带大家全面拆解交换芯片行业现状、增长逻辑、市场格局与国产发展机遇。

一、两大应用场景:Scale out & Scale up,分工各不同

数据中心交换芯片主要分为Scale out(横向拓展)Scale up(纵向拓展)两大路线,适配不同算力组网需求,也是本轮行业增长的两大核心抓手。

1. Scale out:跨节点组网,支撑超大算力集群

Scale out 主打跨服务器、跨机柜互联,是传统数据中心主流架构,依靠大规模组网扩大整体算力规模。
特点:单卡通信带宽 400Gbps-1.6Tbps,端到端时延为微秒级,更侧重大流量调度、无损防拥塞;
需求逻辑:AI 大模型训练催生海量 “东西向流量”,万卡级集群持续扩容,直接带动 Scale out 芯片量价齐升,芯片向更高容量、更快端口速率迭代。

2. Scale up:机柜内高密度互联,超节点核心载体

Scale up 聚焦单机柜 / 小集群内部多 GPU 直连,也是当下国产算力追赶海外的关键路径,依托高带宽、低时延实现单节点算力最大化。
特点:单卡双向带宽可达 4.8Tbps-14.4Tbps,端到端时延压缩至百纳秒级,对芯片时延指标要求极致严苛;
需求逻辑:国产单卡算力存在差距,行业普遍通过超节点架构以网络运力弥补算力短板,国产超节点中交换芯片与 GPU 配比显著高于海外,直接催生海量增量需求。

二、行业高景气:AI + 超节点双驱动,市场空间爆发

1. 需求端全面走强,海内外资本开支加码

无论是海外云巨头还是国内互联网大厂、运营商,均在持续加大 AI 算力基础设施投入,为交换芯片提供坚实需求底座:
海外:微软、亚马逊、Meta、谷歌四大云厂商 2026 年资本开支全面上调,全球 AI 基础设施投资长期向上;
国内:阿里、腾讯、百度、字节持续加码 AI 布局,三大运营商 2026 年算力资本开支预计同比增长 32%,算力网络建设提速。
AI 训练与推理双重需求共振:大模型参数突破十万亿级,训练集群规模持续膨胀;多模态应用普及,推理端流量指数级增长,高带宽、低时延的智能算力网络成为刚需。

2. 市场规模预测:2028 年国产市场合计达 242 亿元

结合测算,2026-2028 年国产交换芯片行业进入高速增长期,三年复合增速高达 96%
Scale out 赛道:2028 年国产市场规模预计113 亿元,2026-2028 年 CAGR 60%,国产化率提升至 65%;
Scale up 赛道:2028 年国产市场规模预计129 亿元,2026-2028 年 CAGR 212%,国产化率提升至 75%;
Scale up 赛道增速遥遥领先,核心受益于国产超节点集中落地,2026 年也被视作国产超节点放量元年。

三、市场格局:海外巨头垄断,国产厂商加速突围

1. 全球格局:高度集中,海外龙头占据绝对主导

交换芯片行业技术壁垒高、客户粘性强,全球市场呈现寡头垄断格局:
2024 年全球市场:博通、Marvell、思科三大海外巨头合计市占率77.14%,英伟达凭借 IB 网络与 Scale up 芯片稳居第二梯队;
技术代差:海外头部厂商已量产102.4T高端交换芯片,支持 1.6T 超高端口速率;国内目前最高量产水平为 25.6T,技术仍存在差距。

2. 国内商用市场:海外份额超 97%,替代空间广阔

2020 年国内商用以太网交换芯片市场中,博通、Marvell、瑞昱合计市占率 97.8%,国产龙头盛科通信仅占 1.6%。在供应链安全、自主可控的大趋势下,国产替代成为必然方向。

四、三大变革趋势,国产迎来历史性机遇

当下交换芯片行业正迎来高端化、Scale up 起量、国产化三大变革,也是国产厂商弯道超车的黄金窗口期。

趋势一:芯片持续高端化,速率 & 容量双升级

全球头部厂商芯片快速迭代:博通、英伟达、思科相继推出 102.4T 交换容量芯片,最高支持 1.6T 端口速率;InfiniBand、NVLink 等互联协议也持续带宽翻倍。未来 400G/800G 将成为数据中心交换机主流,1.6T 端口逐步商用,倒逼交换芯片性能持续升级。

趋势二:超节点重塑赛道,国内外站在同一起跑线

这是国产厂商最大的机会点
Scale up 属于新兴赛道,全球尚未形成统一协议标准,海外英伟达依赖封闭 NVLink 协议,国内则发力 UALink、OISA、ETH-X 等开放标准,本土厂商与海外巨头起跑线一致;
超节点需要交换芯片与 GPU 深度底层适配,国内厂商响应更快、协同意愿更强,本土化优势凸显;
华为、阿里、百度、曙光等国内企业纷纷推出自研超节点产品,规模化落地带动 Scale up 芯片需求爆发。

趋势三:政策 + 供应链倒逼,国产化提速

受海外半导体出口管制影响,算力产业链自主可控诉求大幅提升。叠加国内多项算力、AI 扶持政策落地,政企、运营商、互联网厂商主动推进国产芯片适配:
政企、信创客户:优先选用国产芯片,落地节奏最快;
运营商:牵头成立生态联盟,推动国产中高端芯片测试、商用;
互联网厂商:Scale up 领域国产化推进速度显著快于传统 Scale out。

五、产业链核心玩家盘点

🔹 海外龙头(技术标杆)

博通:全球绝对龙头,Tomahawk 6 芯片达 102.4T,兼顾 Scale out 与超节点场景;
英伟达:深耕 IB 网络 + NVLink Scale up 芯片,绑定自家 GPU 生态;
Marvell、思科:高端芯片实现 51.2T-102.4T 量产,占据全球中高端市场主要份额。

🔹 国内核心厂商(国产主力)

盛科通信:国内商用交换芯片龙头,25.6T 高端芯片已进入商用推广,深度参与运营商开放协议;
中兴通讯(中兴微):自研 “凌云” AI 交换芯片,布局超节点 Scale up 赛道,112G SerDes 技术实现突破;
华为(未上市):自研 UB Switch 芯片,配套自有超节点 CM384,实现整机 + 芯片闭环;
其他潜力企业:楠菲微、云合智网、篆芯半导体、众星微等,分别在 400G/800G、UALink 协议、类 IB 芯片等细分领域布局。

六、风险提示

云厂商、运营商资本开支不及预期,数据中心建设进度放缓;
超节点技术落地、生态适配进度低于预期,拖累 Scale up 芯片需求;
高端 SerDes IP、协议生态等技术壁垒,导致国产芯片迭代速度不及预期。

总结

AI 与超节点的双重驱动下,交换芯片行业正式开启第二轮高增长周期。短期来看,海外巨头仍主导高端市场;但中长期,凭借新兴 Scale up 赛道、本土开放协议、政策与供应链安全三大优势,国产交换芯片厂商有望快速缩小技术差距、提升市场份额。作为算力网络的 “心脏”,交换芯片的国产替代之路,也将成为中国 AI 算力产业自主崛起的重要缩影。

研报分享

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  1. CONNECT:[ UseTime:0.000889s ] mysql:host=127.0.0.1;port=3306;dbname=wenku;charset=utf8mb4
  2. SHOW FULL COLUMNS FROM `fenlei` [ RunTime:0.001366s ]
  3. SELECT * FROM `fenlei` WHERE `fid` = 0 [ RunTime:0.001991s ]
  4. SELECT * FROM `fenlei` WHERE `fid` = 63 [ RunTime:0.000896s ]
  5. SHOW FULL COLUMNS FROM `set` [ RunTime:0.001383s ]
  6. SELECT * FROM `set` [ RunTime:0.000658s ]
  7. SHOW FULL COLUMNS FROM `article` [ RunTime:0.001506s ]
  8. SELECT * FROM `article` WHERE `id` = 752243 LIMIT 1 [ RunTime:0.005319s ]
  9. UPDATE `article` SET `lasttime` = 1781606711 WHERE `id` = 752243 [ RunTime:0.012634s ]
  10. SELECT * FROM `fenlei` WHERE `id` = 64 LIMIT 1 [ RunTime:0.000721s ]
  11. SELECT * FROM `article` WHERE `id` < 752243 ORDER BY `id` DESC LIMIT 1 [ RunTime:0.001101s ]
  12. SELECT * FROM `article` WHERE `id` > 752243 ORDER BY `id` ASC LIMIT 1 [ RunTime:0.001125s ]
  13. SELECT * FROM `article` WHERE `id` < 752243 ORDER BY `id` DESC LIMIT 10 [ RunTime:0.001590s ]
  14. SELECT * FROM `article` WHERE `id` < 752243 ORDER BY `id` DESC LIMIT 10,10 [ RunTime:0.001788s ]
  15. SELECT * FROM `article` WHERE `id` < 752243 ORDER BY `id` DESC LIMIT 20,10 [ RunTime:0.002183s ]
0.129181s