(Overview of Cisco Multilayer Switching Campus Network Design Model This article first describes how to use multilayer switches to build a campus network, and then explains in detail the design points of a multilayer switch network. Generally speaking, using a multi-layer switching network with hierarchical design can make the network work in the best state, and has better scalability, fault tolerance and operability. Whether Ethernet is used as the backbone or ATM is used as the backbone, the multi-layer switching mode has its advantages. The hierarchical design makes the realization of the campus network very easy, and the troubleshooting is also simple, because the multi-layer switching design is Modular, so can be upgraded based on the addition of building modules. The role of the third layer can limit the broadcast data outside the core switching network, and can realize the link load balancing function on the backbone network through OSPF and EIGRP protocols. Multi-layer switching maintains the existing addressing mode, easy to migrate, UplinkFast tunnel and HSRP protocol provide redundancy and fast convergence. Bandwidth upgrades can be from Ethernet to Fast EtherChannel, Gigabit Ethernet to Gigabit EtherChannel, and the multi-layer modules support a variety of existing protocols. Directory Campus Network Design Considerations ................................................................................................................................ 2 Bridging of Networks ................................................................................................................................ ……………… 2 Addressing capability and upgrade capability ……………………………………………… 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 Construction of the Multilayer Exchange Model ……………………………………………… 9)
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