园区网设计考虑因素…………………………………………………………2网络的桥接………………………………………………………………2寻址能力和升级能力……………………………………………………2第二层交换………………………………………………………………3第三层交换………………………………………………………………4第四层交换………………………………………………………………4虚拟局域网VLAN和仿真局域网LANE………………………………4园区网设计的参考模型………………………………………………………5Hub和路由器模型………………………………………………………5园区网VLAN模型………………………………………………………6ATM上的多协议交换……………………………………………………7多层交换模型…………………………………………………………………8新一代80/20规则………………………………………………………8多层交换模型的组建……………………………………………………9冗余和负载平衡…………………………………………………………9带宽升级…………………………………………………………………12核心层策略………………………………………………………………13定位服务器………………………………………………………………14ATM/LANE主干………………………………………………………14IP组播访问……………………………………………………………16迁移策略…………………………………………………………………18安全性能…………………………………………………………………19多层模型之间的桥接……………………………………………………19多层模型的优点………………………………………………………………20附录A：实现多层设计模型…………………………………………………20以太网主干………………………………………………………………20服务器配置………………………………………………………………26ATMLANE主干………………………………………………………27小结：……………………………………………………………………34
(Design considerations for campus network……………………………………………………2 Bridging of networks……………………………………………… ………… 2 Addressability and Upgradability ……………………………………………… 2 Layer 2 Switching ……………………………… ………………………… 3 Layer 3 exchanges………………………………………………………… 4 Layer 4 exchanges………… ………………………………………………4 Virtual Local Area Network (VLAN) and Emulated Local Area Network (LANE)…………………………4 Reference Model for Campus Network Design………… …………………………………………5Hub and router models……………………………………………………5 Campus VLAN model………… ………………………………………… 6 Multi-protocol switching over ATM ……………………………………………… 7 Multi-layer switching model ?… ………………………………………………………… 8 New Generation 80/20 Rule ……………………………………………… ……8 Formation of the Multilayer Switching Model ……………………………………………… 9 Redundancy and Load Balancing …………………………………… ……………… 9 Bandwidth upgrades ……………………………………………………………… 12 Core layer strategy ………………………… ……………………………… 13 Location Servers …………………………………………………… 14 ATM/LANE Backbone ……………… …………………………………… 14 IP Multicast Access …………………………………………………… 16 Migration Strategy ………… ……………………………………………… 18 Safety features ……………………………………………… 19 more Bridging between layer models ……………………………………………… 19 Advantages of multi-layer models ………………………………………… ………… 20 Appendix A: Implementing the Multilayer Design Model …………………………………… 20 Ethernet Backbone ………………………… ………………………… 20 SERVER CONFIGURATION …………………………………………………… 26 ATLANE Trunk …………………… ………………………… 27 Summary: …………………………………………………… 34)
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