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Whether it is the deployment of small network enterprises or large data center networks, switches are an indispensable and important component. They connect functional units of various lines according to individual user needs. We usually encounter Ethernet switches, fiber optic switches, and so on. So what are core network switches and AGG switches? What is the difference between the two? This article will provide you with a detailed introduction.

The conceptual difference between core network switches and aggregation switches

The biggest difference between core network switches, aggregation switches, and regular switches is that they are not specific types of switches, but are distinguished based on their functions. Conceptually, a network switch deployed at the core layer is called a core network switch. Similarly, switches deployed at the aggregation layer are called AGG switches. To understand these two types of switches, it is necessary to first understand what the core layer and aggregation layer are.

Core layer

The core layer is the central backbone of the entire network layout, carrying and aggregating all transmission traffic. It plays a management role and is the main guarantee of network performance. In addition to core network switches, the core layer also includes devices such as routers and firewalls. Its main function is to provide high-speed transmission and optimization for aggregation layer devices. It is an indispensable part of network deployment.

Aggregation layer

The aggregation layer is mainly used to reduce the load on core layer devices and act as a communication intermediary. It has multiple functions, such as implementing policies, security, workgroup access, routing between VLANs, source or destination address filtering, etc. The aggregation layer is often overlooked in practical applications, especially in short distance transmission, because the full access of the core layer can directly connect to the access layer. The common two-layer network architecture is this type of connection method, which can save network layout and subsequent maintenance costs to a certain extent.

Application of Aggregation Switches

Data Center Network

In large data centers, aggregation switches connect multiple servers and storage devices, providing high bandwidth, low latency connections to meet the needs of large data centers.

Campus network

In the park network, aggregation switches connect the access layers of multiple buildings, laboratories, and student dormitories, providing high-speed links and traffic management.

Branch network

In cross regional branch networks, aggregation switches are used to connect the access layers of each branch and aggregate data streams to the core layer, thereby achieving cross regional communication and data exchange.

Application of Core Network Switches

Internet Access Point

In an ISP network, the core layer connects multiple aggregation layers and routes data traffic to the target Internet access point.

Large enterprise network

In large enterprise networks, core network switches are used to connect multiple aggregation layers and data centers. They support telecommunications and data exchange between different departments within the enterprise, as well as connectivity to external networks.

Cloud service provider network

In the network architecture of cloud service providers, core network switches are key components that connect multiple data centers and cloud regions.