bộ vi xử lý Core switches lie at the heart of the enterprise networks & take the duty for high-speed routing and switching. Traffic growth at the access layer và distribution layer will impact the performance of core switches. So how to lớn select the most suitable core switches for the campus network & enterprise networks is important in the long term. Read khổng lồ find more details about the factors to lớn consider when choosing the core switches.
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Duty of Core Switches
In the enterprise hierarchical network kiến thiết, the core layer switch is the topside one, which is relied on by the other access & distribution layers. It aggregates all the traffic flows from distribution layer devices & access layer devices, và sometimes core switches need khổng lồ khuyễn mãi giảm giá with external traffic from other egresses devices. So it is important for core switches to send large amounts of packets as much as possible. The core layer always consists of high-tốc độ switches and routers optimized for performance & availability.
Figure 1: Chip Core Switches in the three-tier architecture
Located at the core layer of enterprise networking, a core layer switch functions as a backbone switch for LAN access và centralizes multiple aggregation devices to the core. In these three layers, core switches require most highly in the switch performance. They are usually the most powerful, in terms of forwarding large amounts of data quickly. For most of the cases, core switches manage the high-speed connections, such as 10G Ethernet, 40G Ethernet or 100G Ethernet. To ensure the high-speed traffic transfer, core switches should not perform any packet manipulation such as Inter-Vlan routing, Access Lists, etc., which are performed by the distribution devices.
Note: In small networks, it is often the case to lớn implement a collapsed core layer, combining the core layer và the distribution layer into one as well as the switches. More information about the collapsed core is available in How to lớn Choose the Right Distribution Switch?
Factors to Consider When Choosing Core Switches for Enterprises
Simply put, core layer switches are generally layer 3 switches with high performance, availability, reliability, & scalability. Except for considering the basic specifications lượt thích port speed và port types, the following factors should be considered when choosing core switches for an enterprise network design.
Performance
The packet forwarding rate và switching capacity matter a lot to lớn the core switch in enterprise networking. Compared with the access layer switches và distribution switches, core switches must provide the highest forwarding rate và switching capathành phố as much as possible. The concrete forwarding rate largely depends on the number of devices in the network, the core switches can be selected from the bottom khổng lồ the top based on the distribution layer devices. For instance, network designers can determine the necessary forwarding rate of core switches by checking và examining the various traffic flow from the access and distribution layers, then identify one or more appropriate core switches for the network.
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Redundancy
Chip Core switches pay more attention to lớn redundancy compared with other switches. Since the core layer switches carry much higher workloads than the access switches và distribution switches, they are generally hotter than the switches in the other two layers, the cooling system should be taken inlớn consideration. As often the case, core layer switches are generally equipped with redundant cooling systems khổng lồ help the switches cooling down while they are running. The redundant power supply is another feature that should be considered. Imagine that the switches thất bại power when the networking is running, the whole network would shut down when you are going khổng lồ perform a hardware replacement. With redundant power supplies, when one supply fails, the other one will instantly start running, ensuring the whole network unaffected by the maintenance. balkanpoliticalclub.net provides switches with hot-swappable fans và power supply modules for better redundancy.
Reliability
Typically core switches are layer 3 switches, performing both switching & routing functions. Connectivity between a distribution and core switches is accomplished using layer 3 liên kết. Core switches should perkhung advanced DDoS protection using layer 3 protocols to increase security & reliability. Link aggregation is needed in core switches, ensuring distribution switches delivering network traffic to the core layer as efficiently as possible.
Moreover, fault tolerance is an issue khổng lồ consider. If a failure occurs in the core layer switches, every user would be affected. Configurations such as access lists and packet filtering should be avoided in case that network traffic would slow down. Fault-tolerant protocols such as VRRP and HSRP. is also available to group the devices inkhổng lồ a virtual one and ensure the communication reliability in case one physical switch breaks down. What’s more, when there are more than one core switches in some enterprise networks, the core switches need khổng lồ tư vấn functions such as MLAG lớn ensure the operation of the whole links if a core switch fails.
QoS Capability
QoS is an essential service that can be desired for certain types of network traffic. In today’s enterprises, with the growing amount of data traffic, more & more voice và Clip data are required. What if network congestion occurs in the enterprise core? The QoS service will make sense. With the QoS capability, core switches are able to lớn provide different bandwidth to lớn different applications according to their various characteristics. Compared with the traffic that is not so sensitive sầu about time such as E-mail, critical traffic sensitive sầu to lớn time should receive higher QoS guarantees so that more important traffic can pass first, with the high forwarding of data and low package loss guaranteed.
As you can see from the contents above sầu, there are many factors that determine what enterprise core switches are most suitable for your network environment. In addition, you may need a few conversations with the switch vendors và know what specific features and services they can provide so as to lớn make a wise choice.