L3 switch settings required for network backbone and subnet connection

Set the network backbone and the layer-3 Switch required to connect to the subnet. Let's talk about how to set the layer-3 switch. The following three-tier switch settings are indispensable for the network backbone, and the three-tier switch settings for the connection subnet are explained by professionals to ensure you can learn.

Three-layer switch settings are indispensable for network backbone

To describe the role of a layer-3 Switch in many network devices, it is not described as a "mainstay. In campus networks and urban education networks, three-layer switches are available for Backbone Networks, man backbone networks, and aggregation layers. In particular, the core backbone networks must be configured with three-layer switches, otherwise, thousands of computers on the entire network will be deployed in a sub-network, which is not only insecure, but also unable to isolate broadcast storms due to the inability to divide broadcast domains.

Although traditional routers can be used to isolate broadcasts, their performance is not guaranteed. The performance of layer-3 switches is very high. The layer-3 switches provide both the routing function and the network speed of layer-2 switches. Layer-2 switching is based on MAC addressing, while layer-3 switches are configured to forward traffic based on layer-3 addresses. In addition to the necessary route decision processes, most data forwarding processes are handled by layer-2 switching, this improves the efficiency of packet forwarding.

Layer-3 switches use a hardware exchange mechanism to implement the IP routing function. The optimized routing software improves the routing efficiency and solves the routing speed problem of traditional routers. Therefore, it can be said that layer-3 switch settings have "vro functions and vswitch performance ".

 

Why use layer-3 switch settings and their benefits

Layer-3 switch settings are indispensable for connecting subnets

If the number of computers on the same network exceeds a certain number, usually around 200, depending on the communication protocol), it is likely that the network transmission efficiency will be low due to a large number of broadcasts on the network. To avoid a broadcast storm caused by broadcasting on a large vswitch, You can further divide it into multiple virtual network VLANs ).

However, this will cause a problem: Communication Between VLANs must be implemented through routers. However, traditional routers cannot perform communication tasks between VLANs, because the Routing Capability of traditional routers is too weak compared with the network traffic of LAN.

In addition, the price of a gigabit router is unacceptable. If you use the 1-gigabit or 10-Gigabit ports configured on a layer-3 Switch to connect different subnets or VLANs, you can maintain performance, after Dividing subnets economically, subnets must rely on routers for communication. Therefore, layer-3 switch settings are ideal devices for connecting subnets.