What is the benefits of three tier network

[Laramie]

Hi all

I am using second tier exchange technology, network architecture. Its main weaknesses are: the LAN can not be divided into VLAN; workstation with a network segment will cause broadcast storms too much, or even bring down the network; can not effectively solve the heterogeneous network interconnection, security, control and other issues. The three-tier switching technology, network architecture, largely avoiding layer switching technology network architecture defects, can improve the network overall performance. I want to know that benefits of three tier network. Thanks in advance.
　　

[Shen]

Three-tier network architecture uses a hierarchical model design, a complex network design will be divided into several levels, each level of focus on certain specific functions, thus enabling a large and complex problem into a number of simple little question. Three-tier network architecture network has three layers: the core layer (high-speed switching backbone network), convergence layer (to provide policy-based connections), access layer (to be workstations access network). Check and reply.

[Steve123]

Core layer is the network of high-speed switching backbone of the entire network connectivity play a crucial role. The core layer should have the following several characteristics: reliability, efficiency, redundancy, fault tolerance, manageability, adaptability, low-latency and so on. In the core layer, should be used for more than a high-bandwidth Gigabit switch. Because the core layer is the network hub, the importance of highlighting. The core layer device using two-plane redundancy hot backup is very necessary, load-balancing feature can also be used to improve network performance. Check and reply.

[Milton.J]

Access layer to provide workstation access to the local network segment. In the access layer, reducing the number of workstations the same network segment that can provide high-speed bandwidth to the Working Group. Access layer can choose not to support VLAN and Layer switching technology common switches. Three-layer network architecture model as shown. Check and reply.

[Spyrus]

The rational allocation of the core switches, give full play to the core switch hardware performance, adjusted for the core switches in bandwidth, network traffic handling capacity of the outstanding performance, good scalability. The information system network, according to business needs into VLAN, control of radio range, suppress broadcast storms and improve the overall LAN performance and security. The reliability of the entire network to be strengthened, the core switches, dual hot-standby, load balancing methods, namely, two core switches are involved in the work under normal conditions, when any one of them fails, another one automatically, without sew take over its work, which is network administrators, users are transparent failover without manual intervention. 4 is to improve the network of automatic fault tolerance unexpected incidents, minimize the network failure time. Check and reply.

[Snake08]

Three-layer switching technology, also known as multi-layer switching technology, or IP switching technology, is relative to the second floor of the exchange of technology proposed by the network due to work in the OSI seven standard model in the third layer of the named. Traditional Routing Devices also work in the third layer, it can handle a large number of cross-IP subnet packets, but it's forwarding efficiency is relatively low, while the three-tier standard model in the network switching technology in the third layer of the high-speed packet forwarding, efficiency greatly improved. Check and reply.