Comprehensively improve network quality, create high-quality projects in colleges and universities

Editor's note: D-Link launches a large campus network solution

Construction background


The continuous deepening of education informatization not only improves the quality and efficiency of teaching, realizes the sharing of educational resources and network management, but also puts forward higher requirements for the network construction and upgrade of major universities: emerging online teaching methods, educational management systems and video Extensive applications such as on-demand make the network traffic increase day by day, which puts huge pressure on the existing network systems of major universities. The increasing enrollment of colleges and universities every year has led to the continuous expansion of the scale of the school, and the problem of the lack of the number of existing network ports is increasingly prominent. At the same time, as the infrastructure of colleges and universities continues to increase and improve, the network coverage needs to be further expanded. In addition, due to the increasingly complex network environment, college network communications will face severe security challenges, but also bring difficulties to network management.

As an important force to fully support education informatization, D-Link, an internationally renowned network equipment and solution provider, tailored a comprehensive and multi-level solution to the characteristics and needs of large-scale campus network applications, reflecting D-Link Link has excellent network integration capabilities and strong technical strength in the education industry.

Network requirements

Large campuses are large in scale, have many buildings, and even consist of multiple campuses. The number of information points is generally more than 500. Therefore, the network coverage usually reaches several kilometers. The multimedia network classrooms, libraries, dormitories, Experiment buildings, teaching buildings, office buildings and other types of buildings are numerous and numerous. The vast network radiation area and the large number of accesses require a strong network core to provide ample power. At the same time, due to the large number of access units and complicated management, it is necessary to pay attention to their scalability and intelligence in terms of device selection. In addition, a large number of important data such as teaching materials, student files and grades are kept in the school network, so the safety of the equipment is very important. Finally, the diverse network applications on the campus make the network traffic huge and unevenly distributed, requiring the network system to provide sufficient bandwidth and ensure superior stability. Therefore, multiple factors must be considered in the network upgrade construction, including the use of inherent network facilities, flexible and flexible network structure, intelligent centralized management, multiple security protection, etc., to ensure that the campus network can meet the current and future evolving network applications and demand.

Network structure

After carefully analyzing the characteristics and application requirements of large-scale campus networking, D-Link launched a complete set of large-scale campus network solutions with years of deep accumulation in the education industry. The whole scheme adopts a standard three-layer network structure, realizes 10 Gigabit uplink, integrates industry-leading wireless, VoIP and other technologies for flexible networking, and comprehensively improves the quality of the entire network system. The network topology diagram is as follows:

Topology

Topology diagram of large campus network

At the core layer of the network, D-Link selects the latest high-performance 10 Gigabit core routing switch DES-6500 as the network backbone. As a core switching device, the DES-6500 switch has a large backplane capacity of 352G, making all its ports have full line-speed switching capabilities, ensuring that the line speed of Layer 2 and Layer 3 can always be maintained under huge network load Switching is an ideal choice for backbone routing switches of large campus networks.

DES-6500 supports multiple routing protocols, such as RIP, OSPF, IPX-RIP, Apple Talk Routing, to ensure the flexible transmission of routing information in different network environments. DES-6500 has 8 open slots, providing a variety of interface types, users can flexibly choose the access method according to different network applications. DES-6500 is truly designed based on a distributed switching architecture, and the transmission data of all interfaces is exchanged locally, thereby speeding up the data transmission rate. The excellent performance of DES-6500 provides a continuous and sufficient power for large-scale campus to achieve high-speed network communication.

In terms of functions, DES-6500 provides a wealth of QoS strategies, which not only can process various network tasks in a hierarchical manner, but also can adopt different transmission strategies according to different types of data, plus hardware-based IGMP, GMRP, DVMRP, PIM DM Multicast protocols such as SM provide sufficient network space and the best network rate for multimedia network applications such as online teaching and VOD on-demand campus teachers and students.

In order to protect the campus network security and protect the school's educational administration system and important data from illegal infringement, DES-6500 provides multiple security strategies, including dynamic VLAN division based on the 802.1Q standard, IP filtering function for controlling network traffic, etc. And fully support the 802.1x standard, bringing all-round and multi-level security protection to the school.

Due to the relatively concentrated online time of teachers and students, the campus network has huge network traffic at certain times, which is a great test for network lines. In view of this, DES-6500 incorporates standard links such as VRRP, spanning tree, and port aggregation. It has extra functions, and provides hot-swappable fault-tolerant modules and redundant power supplies for backup, which fully guarantees the stable operation of the campus network.

As the network hub responsible for data aggregation, convergence, and distribution, the aggregation layer plays a key role. The scheme uses D-Link DGS-3324SRi full Gigabit stackable switches as the main equipment of the aggregation layer. DGS-3324SRi is a three-layer switch with excellent performance and rich functions. It can be used as a stacking main switch, as well as a high-port density gigabit switch with 24-port copper cables and optical fiber connections. DGS-3324SRi, as a high-performance extended switching architecture, can work with stackable devices to increase the stack interconnect bandwidth from 20Gbps to 120Gbps. In the actual application process, school users can flexibly choose the number of stacks according to their campus scale.

The DGS-3324SRi incorporates more leading practical functions and performs better in terms of stability. In addition to providing rich QoS policies and supporting compatible 802.1d and 802.1w rapid spanning trees, DGS-3324SRi also specifically introduces a redundant power supply design to ensure that the built-in power supply can continue to work without being affected.

The management performance of DGS-3324SRi also brings a lot of convenience to the school. The product adopts a single IP management mechanism, has practical functions such as VLAN division based on 802.1Q standard, RMON monitoring, DNS relay, link aggregation, etc., and fully supports SNMP v1 / v2c / v3 management, which can make network management more efficient and centralized And convenient.

The access layer shoulders the important task of connecting all network terminals, and its quality directly affects the quality of the network. The D-Link DES-3526 stackable switch is ideal for access layer switching equipment. The high-density 24-port setting and the stacking of up to 32 devices make the DES-3526's expansion advantages very prominent, and can provide ample network ports for the huge network users on campus. Superior virtual technology enhances network resilience and is very suitable for the rapidly developing campus network.

DES-3526 provides a flexible access method, not only can directly connect to the client, but also in a library, campus conference room and other environments that are not suitable for network wiring or need to be networked at any time, you can also achieve flexible access to the wireless LAN Network coverage to meet the networking needs of teachers and students in special locations.

Facing a large number of network access terminals, DES-3526 adopts SIM single IP management technology to achieve cluster management, which not only saves IP addresses, but also provides a graphical, batch-based centralized management mode, which is helpful for managers to Stacking groups perform centralized control, which simplifies the network deployment and management process. In addition, the enhanced functional and security features of DES-3526 are also an important support to ensure the high-speed and stable network applications of teachers and students on campus.

Program features

Throughout the entire package, the D-Link large campus network solution has the following characteristics.

1. The network core adopts the DES-6500 high-performance 10 Gigabit switch to ensure that the network system can maintain high-speed, continuous and stable operation under any circumstances. The rich network interface type can not only achieve remote connection with the education network, but also meet the requirements The diverse network application requirements of campus teachers and students.

2. The scheme provides sufficient, rich, and flexible access methods for network terminals, not only providing high-density PC access ports in teaching areas, office areas, and dormitory buildings where the network is densely used, but also flexibly introducing wireless connections according to local conditions. And VoIP network voice system.

3. The switching devices selected in the plan all have multi-layer switching capabilities, and provide multiple security access mechanisms based on policies including VLAN partitioning, IP filtering, and 802.1x to bring comprehensive and multi-level security protection to large campus networks.

4. Intelligent network management not only can realize remote control, but also the unique single IP address management technology greatly simplifies the management steps, and realizes the centralized management mode of graphical and batch processing, thereby comprehensively improving the maintainability of the system and reducing the cost of use. .

5. Abundant QoS strategies ensure that the delay-sensitive network data such as audio and video can be forwarded in time and accurately, providing sufficient network bandwidth and the best network rate for multimedia applications such as online teaching and VOD on-demand for campus teachers and students.

Taken together, the D-Link large campus network solution has led the university network into high-speed and fast lanes, and has fundamentally solved the bottleneck of network congestion. The entire network system combines scalability, intelligent management, security and stability, and fully meets the needs of diverse network applications such as online teaching, network management, resource sharing and Internet telephony, and realizes the leading network communication technology and educational information. Harmony and unity

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