H3C低时延交换机技术白皮书

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H3C 低时延交换机技术白皮书

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1 低时延交换机简介 ···································································································································· 1

1.1 产生背景 ··············································································································································· 1

1.2 典型组网应用 ········································································································································ 1

2 低时延交换机关键技术介绍 ····················································································································· 2

2.1 L1 以太网交换机 ··································································································································· 2

2.1.1 Patch panel ································································································································ 2

2.1.2 Fan-out ······································································································································ 3

2.1.3 Tapping ······································································································································ 3

2.2 L1.5 以太网交换机 ································································································································ 4

2.2.1 FastMux ····································································································································· 5

2.2.2 增强 SecurityMux ······················································································································· 5

2.2.3 多分组 SecurityMux ··················································································································· 5

2.2.4 LargeBuffer ································································································································ 6

2.2.5 Tapping Aggregation ················································································································· 6

2.3 L2/L3 低时延交换机 ······························································································································ 6

3 低时延交换机产品介绍 ···························································································································· 6

3.1 S6116 系列 L1 和L1.5 低时延交换机 ··································································································· 7

3.2 S6216 系列 L2/L3 低时延交换机 ·········································································································· 8

3.3 S6826&S9826 系列 L2/L3 低时延交换机 ····························································································· 9

低时延交换机简介

1.1 产生背景

随着计算机技术和金融科技的发展，高频交易在金融市场上的应用越来越广泛，并且已逐渐成为众

多交易机构的主要盈利方式。在欧美市场，高频交易占总交易量的比例已经达到 60%以上，在亚洲

市场这一比例也将达到 20%以上。随着国内金融监管政策的放松，高频交易在国内发展迅速，市场

上已经涌现出一批成功的投资机构。在未来，高频交易会随着监管环境的逐渐宽松而得到更进一步

的发展。

高频交易的特点是报单和撤单迅速、持仓时间短，交易过程对交易系统的时延有极高的要求。在瞬

息万变的市场环境中，投资者更快地看到行情变化并且传递交易指令就会取得先人一步的优势。因

此，低时延交易网络成为高频交易投资者的迫切需求。

新华三集团基于二十多年来在以太网交换机技术领域的深厚积累以及对金融证券公司低时延交易

网络的深入理解，开发了多款低时延交换机，可以为金融客户提供端到端的超低时延组网解决方案：

•

S6116 系列交换机

•

S6216 系列交换机

•

S6826&S9826 系列交换机

S6116 系列交换机支持 L1/L1.5 特性，最低转发时延达到 1.5ns，平均时延 4ns 以下，突破了传统

以太网交换机 500ns 的时延瓶颈，为证券期货公司构建超低时延交易网络提供了可能。

S6216 系列交换机不仅支持 L1/L1.5 特性，还支持 L2/L3 特性，L2 转发时延 117ns，L3 转发时延

152ns。

S6826 和S9826 系列交换机在提供低时延转发的同时，还提供了二、三层特性。

1.2 典型组网应用

证券期货交易网络处于持续演进中。传统交易网络一般采用三层交换机，单跳转发时延高达 1微秒，

端到端时延高达几百微秒。将传统三层交换机改为低时延三层交换机可以较大的减少网络转发时延；

如果能进一步更改网络架构、引入超低时延的 L1 和L1.5 交换机，可以极大的减少网络时延，为客

户提供最优的网络服务。

下面是两种低时延网络示意图，实际组网要更复杂：

•

机构网络和交易所通过 L3 交换机连接，行情分发采用 L1 交换机，报盘交易采用 L2 交换机，

此方案可以兼顾低时延和三层特性。

•

机构网络和交易所通过 L1.5 交换机连接，行情分发采用 L1 交换机，报盘交易采用 L1.5 交换

机，此方案可以获得极致的低时延体验。

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