实战：用华为 S5735 搭建中小企业三层园区网完整方案

一、方案概述：中小企业三层园区网架构设计

1.1 网络拓扑结构

中小企业三层园区网通常采用核心-汇聚-接入三层架构。华为 S5735 作为核心交换机，连接汇聚层交换机和服务器区域，实现高速数据转发和路由功能。拓扑结构包括接入层交换机连接终端设备，汇聚层交换机连接接入层和核心层，核心层交换机提供高速转发和路由功能。

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接入层交换机

汇聚层交换机

服务器区域

核心层交换机 S5735

互联网

防火墙

该拓扑图展示了典型的三层园区网架构，核心层交换机 S5735 作为网络中心，连接汇聚层、服务器区域和外部网络。

1.2 设备选型与部署

华为 S5735 系列交换机是中小企业网络的核心选择，具有高性能、高可靠性和丰富的业务特性。设备选型时需考虑端口密度、转发性能和扩展能力。部署时需考虑机架安装、电源冗余和散热设计。

二、核心配置：VLAN划分与 trunk 链路配置

2.1 VLAN规划

VLAN划分是园区网的基础，合理的VLAN规划可以提高网络安全性和管理效率。中小企业通常按部门或功能划分VLAN，如办公区、研发区、服务器区等。

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该饼图显示了典型的VLAN规划比例，办公区占比最大，服务器区需要更高的安全隔离。

2.2 Trunk链路配置

Trunk链路用于传输多个VLAN的数据，需要在交换机间配置。配置步骤包括创建VLAN、配置端口模式为Trunk、允许VLAN通过。

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创建VLAN

配置端口模式

允许VLAN通过

验证配置

该流程图展示了Trunk链路配置的基本步骤，确保VLAN间数据正确传输。

三、路由配置：实现跨VLAN通信

3.1 静态路由配置

静态路由配置简单直接，适用于小型网络。需要在核心交换机上配置默认路由和特定网络路由，确保数据包正确转发。

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配置默认路由

配置特定网络路由

验证路由可达性

该流程图展示了静态路由配置的基本步骤，确保跨VLAN通信正常。

3.2 动态路由配置（OSPF）

对于复杂网络，动态路由协议如OSPF更为适用。需要在核心交换机上配置OSPF进程、区域和接口，实现自动路由发现和更新。

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配置OSPF进程

配置OSPF区域

配置OSPF接口

验证OSPF邻居关系

该流程图展示了OSPF配置的基本步骤，确保动态路由正常工作。

四、安全策略：访问控制与QoS

4.1 ACL配置

访问控制列表（ACL）用于控制网络访问权限，保护网络安全。需要在交换机上配置标准ACL和扩展ACL，限制特定流量访问。

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定义ACL规则

应用ACL到接口

验证ACL效果

该流程图展示了ACL配置的基本步骤，确保网络安全访问控制。

4.2 QoS配置

服务质量（QoS）配置用于保证关键业务流量优先传输。需要在交换机上配置流量分类、标记和调度，确保重要数据优先处理。

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流量分类

流量标记

流量调度

验证QoS效果

该流程图展示了QoS配置的基本步骤，确保关键业务流量优先传输。

五、高可用与维护：网络冗余与监控

5.1 STP配置

生成树协议（STP）用于防止网络环路，提高网络可靠性。需要在交换机上配置STP模式、优先级和端口成本，确保网络冗余。

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配置STP模式

配置STP优先级

配置端口成本

验证STP状态

该流程图展示了STP配置的基本步骤，确保网络冗余和环路防止。

5.2 网络监控与维护

网络监控与维护是确保网络稳定运行的关键。需要配置SNMP、Syslog和端口镜像，实现网络状态监控和故障排查。

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配置SNMP

配置Syslog

配置端口镜像

监控网络状态

该流程图展示了网络监控配置的基本步骤，确保网络稳定运行和快速故障排查。