The three-tier network architecture has three layers: the core layer (the high-speed switching backbone of the network), the convergence layer (providing policy-based connection) and the access layer (connecting workstations to the network).
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Three-layer network structure short board
1, the ever-changing three-layer network structure data center network transmission mode.
2. Network convergence: In the three-layer network structure, the storage network and the communication network are in the same physical network, and the data transmission between the host and the array is carried out through the storage network, which seems to be directly connected in the logical topology.
3. Virtualization: transforming physical clients into virtual clients. Virtualization server is the mainstream and trend of future development, which makes the movement of network nodes with three-layer network structure very simple.
4. If hosts in a three-layer network structure need to access each other through high-speed bandwidth, but through layers of uplink ports, it will lead to potential and obvious performance degradation. The original design of three-layer network structure will aggravate this performance degradation. Because Spanning Tree Protocol can prevent redundant links from forming loops, dual uplink access switches can only use one designated network interface link.
5. There will be a bottleneck in the transmission of data from east to west in the vertically designed three-layer network structure, because the data will pass through many unnecessary nodes (such as routers and switches).
Baidu Encyclopedia-Three-layer Network Structure