How to connect a VBR to a LAN

Many people do not know much about the border router, So I studied how the border router connects to the LAN. Here I will share with you, hoping to help you. As we all know, a router can connect to an enterprise LAN and a wide area network (such as the Internet), but it ignores another application of a router, that is, its LAN connection function. For the WAN connection of the VBR, see the topology diagram and the routing diagram of the layer-3 switch.

The role of a vro varies depending on the vro type. Generally, a vro refers to a VBR that is located at the boundaries of different types of networks, as shown in the topology and the router connection diagram of the layer-3 switch. Another type of router is designed not to connect different types of networks, but to connect different local networks or subnets in the same LAN. This is an intermediate node router ". Shows its network structure. Compared with the router connection diagram of a layer-3 switch, it uses the intermediate node border router to replace the original layer-3 switch.

Intermediate node router connection

The "virtual border router" is at the edge or end of the network border and is used to connect different network routers. This is also the type of most border routers currently. As described above, the Internet Access Router and the VPN Router to be introduced later belong to the border router. This type of router supports a wide range of network protocols and routing protocols, with extremely high backboard bandwidth and high throughput capabilities to achieve interconnection between different types of networks (including LAN and WAN.

The "intermediate node Router" is located inside the LAN, which is usually used to connect different LAN and serve as a bridge for data forwarding. The intermediate node router pays more attention to the memory performance of the MAC address and requires a large cache. Because the connected network is basically a LAN, the network protocols supported are relatively simple, and the backboard bandwidth is also small, all of which are to achieve the highest cost effectiveness and adapt to the general enterprise's accompanying capabilities.

Compared with the routing technology of a layer-3 switch, the routing function is certainly better than that of a layer-3 switch, but in a network with frequent LAN data exchange, using an intermediate node router for LAN connection may affect the network performance. In general, if the LAN or subnet to be connected is large, network mutual access is not frequent, and the routing is complicated, it is best to use the intermediate node border router connection scheme. However, it is best to use a layer-3 Switch Connection Mode in a few scenarios where subnet connections and frequent intercommunication between networks. In addition, it can save equipment investment, because layer-3 switches not only provide routing functions to meet application requirements, but also can be used as switches to connect many network devices.