Advantages of Layer 3 switches. Want to be more detailed

It can work in the third layer of the protocol, replacing or partially completing the functions of traditional routers, and at the same time, it has almost the switching speed of the second layer, and the price is relatively cheap. In enterprise networks and teaching networks, a three-layer switch is usually used at the core layer of the network, and different subnets or VLAN are connected through gigabit ports or 100 megabits ports on the three-layer switch.

In the practical application process, the typical practice is that the interconnection of subnets in the same local area network and the routing between VLAN in the local area network use a three-layer switch instead of a router, and only when the interconnection between the local area network and the public network requires cross-regional network access can it be done through a professional router.

Matters needing attention in the use of layer 3 switch

Different brands of switches adopt different switching technologies, which are mainly divided into centralized and distributed. The traditional bus switching structure module is centralized, while the modern switching matrix module is distributed.

Due to the increasing amount of audio, video and data information running in the intranet, the requirements for the processing capacity of switches are getting higher and higher. In order to realize high-speed non-blocking switching under the condition of high port density, it is a wise choice to adopt distributed layer 3 switches. Because the bus switching module still can't avoid the conflict in the Ethernet environment, the matrix only avoids the conflict phenomenon when switching ports.

Refer to Baidu Encyclopedia-Layer 3 Switch for the above contents.