Teaching resource integration, informationization
With the continuous improvement of the level of education informatization in China, the level of integration and utilization of teaching resources is increasing day by day, and the construction of campus networks and education metropolitan areas at all levels has become an important measure for quality education in China. It is reported that the Ministry of Education will further increase the promotion of information projects such as campus networks. Today's Campus Network has become an important infrastructure for school development. It is an indispensable supporting environment for improving the school's teaching and scientific research, and an important symbol for measuring the school's academic level and management level. The concept of campus network has been extensively extended, beyond the scope of pure campus, and represents a type of network structure. As an important support force for the education informationization process in the mainland, D-Link, an internationally renowned network equipment and solution provider, has launched a series of customized campus network solutions, one of which is the D-Link mid-sized campus network solution.
The demand for medium-sized campus networks
The campus scale and application level of intermediate schools are between elementary schools and colleges. There are usually many buildings of this type, with more than 10 buildings and between 500 and 1,000 information points. The campus network needs to provide support for internal teaching and office management, and the multimedia applications in the network are more frequent, which puts higher requirements on the transmission speed and stability of the network. In other words, although the number of users of this type of campus network is not very large, it gathers rich network resources, requires multiple types of applications, has a large number of servers, and has high bandwidth requirements for each information point. Workstation management. Therefore, adhering to customized design ideas and rationally and effectively integrating multiple resources in order to achieve full utilization has become an important principle in formulating plans. An ideal medium-sized campus network solution can provide an open and easy-to-operate platform for school teaching and management, ensure that the campus network that is put into operation is integrated with the school's daily education and office activities, and effectively play an informatized sharing, High efficiency and other advantages.
Effective integration of resources and comprehensive solutions
For the network scale and application level of medium-sized schools, the backbone of the D-Link solution uses Gigabit three-layer switching technology, and the network center uses Gigabit connection to achieve Gigabit down to the floor, independent 100M to the desktop, and up Flexible access to the metropolitan area network and the Internet has established a complete distributed routing switching system. After the completion of the network can meet the needs of multimedia teaching, and through the switch built-in network management software for the unified management of the entire network of switches, to ensure the school's easy management of the campus network and full use of resources.
The first step of the solution is to deploy the network core. In view of the fact that the network core equipment is the basis for the smooth operation of the entire network, the D-Link DES-6500 core routing switch was selected in this solution. The switch is a large-scale network core switch with carrier-class security and reliability. It can provide excellent performance and high reliability for large and medium-sized networks. It is ideal for establishing switching capabilities, stability, security, scalability, and management capabilities. The campus network has laid a good foundation.
First of all, because the DES-6500 uses the switching chips of the CPU card and the board to work simultaneously, the DES-6500 has a switching capacity of 352Gbps. The large-capacity switching backplane can ensure that each port has full bandwidth switching capability in any case. To ensure that under the huge network communication load, it is always possible to easily achieve line-speed Layer 2 and Layer 3 switching, give full play to the potentially powerful switching capabilities of Gigabit Ethernet, and quickly transfer various audio, video, and large-capacity files It is guaranteed that even if student applications and Internet access continue to increase, it will not affect the normal operation of the network. DES-6500 also supports the link aggregation function to facilitate the expansion of the backbone bandwidth and maintain the high-performance performance of future expanded networks.
Secondly, the DES-6500 switch has 8 slots, providing a wealth of interface types. Gigabit ports can choose 12-port mini GBIC modules, and 100-megabit ports include 24-port 10 / 100Base-TX modules. Because its design is based on a truly distributed switching architecture, all interface modules are locally layer 2 switched, all interface modules are hot swappable, and power modules can be redundantly backed up. At the same time, the DES-6500 series also supports standard link redundancy functions such as VRRP, spanning tree, and port aggregation. While optimizing network performance, it further improves the reliability and stability of the campus network. DES-6500 supports hardware-based multicast (Multicast) and commonly used multicast protocols such as IGMP, GMRP, DVMRP, PIM DM / SM, and can effectively deploy video applications such as VoD, which is very suitable for campus network application environments.
Third, the combination of high performance and high security is the outstanding feature of the DES-6500 switch. It can provide comprehensive support for a variety of applications in the medium-sized campus network. The DES-6500 switch supports rich and flexible dynamic VLAN policies, supports 802.1Q VLAN division, supports GARP / GVRP, and provides policy-based QoS technology to provide adequate service quality assurance for the normal operation of campus networks. Moreover, users can classify the data packets according to the characteristics of the switch (such as port, TOS, IP address, TCP port, etc.), and adopt different transmission strategies according to different types of traffic, so that the network performance can be retracted according to the actual application Easy to deal with. In fact, using the IP filtering function of the DES-6500 switch not only allows users to control the bandwidth more accurately, but also ensures that the IP network is protected from network intrusion. As a core-level device, DES-6500 also supports multiple routing protocols, such as RIP, OSPF, IPX-RIP, and Apple Talk Routing, which make it easier to implement efficient and safe information transfer. This is undoubtedly of great significance to the application of campus network.
Then need to realize the connection between the network center and each branch center. The DES-6500 switch is equipped with a 12-port mini GBIC module, which is used to connect the branch center DGS-3312SR and distant campus buildings, such as the auditorium in the topology map; provides a 24-port 10 / 100Base-TX interface module Connect the office area, classrooms and network management workstations in the main building.
The branch center switch adopts DGS-3312SR, which uses 2 1000Base-LX aggregation links between 2 single-mode Gigabit MinGBIC modules and DES-6500 to form a full-duplex 4Gbps backbone, and is connected through several remaining Gigabit interfaces Various buildings on the campus. The branch center switch is equivalent to the transfer station of the campus network, and its efficient operation will ensure that the advantages of the core switch can be extended to each network branch. DGS-3312SR switches can provide 12 dedicated switches with their own dedicated 2Gbps links, support redundant power supplies, adopt a modular configuration, have three-layer data packet routing and extensive management capabilities, which can bring more changes to the sub-central network The versatility and flexibility of the DES-6500 core switch complement each other.
The next step is to connect the building such as the teaching building to the branch center switch through the access switch. This step directly affects the end user's experience in use and management. Therefore, simple and intelligent management and stable performance are emphasized. The D-Link DES-35 series of stackable switches is used in the solution. This is because the DES-35 series uses the latest independent IP management technology of D-Link, which can be completed by running a web browser on a workstation with a unique IP address. Access to the network, monitoring and real-time debugging. This technology not only can effectively save IP addresses, but also can achieve centralized, graphical and batch-based concise management, and improve the accuracy and efficiency of management.
In order to ensure that some applications with special needs are fully met, such as the school ’s digital library needs more support in network transmission, the D-Link medium-sized campus network solution has been fully considered, and the DGS-3324SR 1000 is additionally configured in the network center Mega Layer 3 switch is connected to the server group through the 24 1000Base-T interfaces provided by the switch, and realizes the need for gigabit access to key users. This approach not only ensures that different types of application needs are fully satisfied, but also ensures that the school's network resources can be efficiently and reasonably used, saving the investment cost of the campus network.
Simple and efficient management will help campus network users to better play the role of the network. Therefore, in this solution, the D-Vision network management system is installed in the network management workstation to monitor and manage all network devices. This set of network management system based on Windows NT platform is quite complete in function and very practical. D-Link has been tailored to the five major functional domains (performance management, configuration management, fault management, billing management, and security management) of the ISO network management model according to the actual needs of campus network users, so that the system supports all Chinese The management interface is convenient for users. Because the network management system has good compatibility, it can not only easily manage D-Link network equipment, but also can well support any other network equipment with general SNMP function, and provide the entire network topology and common network management information, so that The network implements the "vertical + horizontal" management feature, making network management and maintenance easier.
Finally, we must connect the completed campus network with the education metropolitan area network and the Internet. If you plan to establish a backup link and want to increase your Internet access autonomy, the school can apply for a leased DDN leased line from the local telecommunications operator, and use the D-Link DI-2621 router to achieve dedicated line access. DI-2621 provides one 10 / 100Base-TX Ethernet port, which can be connected to the backbone of the campus network, and provides four WAN interfaces to connect to the Internet. In addition, one ISDN module can be installed for link backup as required. In order to ensure network security, prevent external intrusions, and control the access behavior of internal users, a powerful DFL-1500 firewall was installed between the router and the campus network.
Through the above four steps, a complete and efficient medium-sized campus network can be built, and the interconnection with the metropolitan area network and the Internet can be achieved. Various information of the school can be aggregated to form a share and be instantaneous with resources outside the campus. Communication, and with the help of the network as an information platform, it provides a powerful platform for the school's office, management, teaching and other daily content.
Customized features, ideal choice
With the continuous improvement of the level of education informatization in China, the level of integration and utilization of teaching resources is increasing day by day, and the construction of campus networks and education metropolitan areas at all levels has become an important measure for quality education in China. It is reported that the Ministry of Education will further increase the promotion of information projects such as campus networks. Today's Campus Network has become an important infrastructure for school development. It is an indispensable supporting environment for improving the school's teaching and scientific research, and an important symbol for measuring the school's academic level and management level. The concept of campus network has been extensively extended, beyond the scope of pure campus, and represents a type of network structure. As an important support force for the education informationization process in the mainland, D-Link, an internationally renowned network equipment and solution provider, has launched a series of customized campus network solutions, one of which is the D-Link mid-sized campus network solution.
The demand for medium-sized campus networks
The campus scale and application level of intermediate schools are between elementary schools and colleges. There are usually many buildings of this type, with more than 10 buildings and between 500 and 1,000 information points. The campus network needs to provide support for internal teaching and office management, and the multimedia applications in the network are more frequent, which puts higher requirements on the transmission speed and stability of the network. In other words, although the number of users of this type of campus network is not very large, it gathers rich network resources, requires multiple types of applications, has a large number of servers, and has high bandwidth requirements for each information point. Workstation management. Therefore, adhering to customized design ideas and rationally and effectively integrating multiple resources in order to achieve full utilization has become an important principle in formulating plans. An ideal medium-sized campus network solution can provide an open and easy-to-operate platform for school teaching and management, ensure that the campus network that is put into operation is integrated with the school's daily education and office activities, and effectively play an informatized sharing, High efficiency and other advantages.
Effective integration of resources and comprehensive solutions
For the network scale and application level of medium-sized schools, the backbone of the D-Link solution uses Gigabit three-layer switching technology, and the network center uses Gigabit connection to achieve Gigabit down to the floor, independent 100M to the desktop, and up Flexible access to the metropolitan area network and the Internet has established a complete distributed routing switching system. After the completion of the network can meet the needs of multimedia teaching, and through the switch built-in network management software for the unified management of the entire network of switches, to ensure the school's easy management of the campus network and full use of resources.
The first step of the solution is to deploy the network core. In view of the fact that the network core equipment is the basis for the smooth operation of the entire network, the D-Link DES-6500 core routing switch was selected in this solution. The switch is a large-scale network core switch with carrier-class security and reliability. It can provide excellent performance and high reliability for large and medium-sized networks. It is ideal for establishing switching capabilities, stability, security, scalability, and management capabilities. The campus network has laid a good foundation.
First of all, because the DES-6500 uses the switching chips of the CPU card and the board to work simultaneously, the DES-6500 has a switching capacity of 352Gbps. The large-capacity switching backplane can ensure that each port has full bandwidth switching capability in any case. To ensure that under the huge network communication load, it is always possible to easily achieve line-speed Layer 2 and Layer 3 switching, give full play to the potentially powerful switching capabilities of Gigabit Ethernet, and quickly transfer various audio, video, and large-capacity files It is guaranteed that even if student applications and Internet access continue to increase, it will not affect the normal operation of the network. DES-6500 also supports the link aggregation function to facilitate the expansion of the backbone bandwidth and maintain the high-performance performance of future expanded networks.
Secondly, the DES-6500 switch has 8 slots, providing a wealth of interface types. Gigabit ports can choose 12-port mini GBIC modules, and 100-megabit ports include 24-port 10 / 100Base-TX modules. Because its design is based on a truly distributed switching architecture, all interface modules are locally layer 2 switched, all interface modules are hot swappable, and power modules can be redundantly backed up. At the same time, the DES-6500 series also supports standard link redundancy functions such as VRRP, spanning tree, and port aggregation. While optimizing network performance, it further improves the reliability and stability of the campus network. DES-6500 supports hardware-based multicast (Multicast) and commonly used multicast protocols such as IGMP, GMRP, DVMRP, PIM DM / SM, and can effectively deploy video applications such as VoD, which is very suitable for campus network application environments.
Third, the combination of high performance and high security is the outstanding feature of the DES-6500 switch. It can provide comprehensive support for a variety of applications in the medium-sized campus network. The DES-6500 switch supports rich and flexible dynamic VLAN policies, supports 802.1Q VLAN division, supports GARP / GVRP, and provides policy-based QoS technology to provide adequate service quality assurance for the normal operation of campus networks. Moreover, users can classify the data packets according to the characteristics of the switch (such as port, TOS, IP address, TCP port, etc.), and adopt different transmission strategies according to different types of traffic, so that the network performance can be retracted according to the actual application Easy to deal with. In fact, using the IP filtering function of the DES-6500 switch not only allows users to control the bandwidth more accurately, but also ensures that the IP network is protected from network intrusion. As a core-level device, DES-6500 also supports multiple routing protocols, such as RIP, OSPF, IPX-RIP, and Apple Talk Routing, which make it easier to implement efficient and safe information transfer. This is undoubtedly of great significance to the application of campus network.
Then need to realize the connection between the network center and each branch center. The DES-6500 switch is equipped with a 12-port mini GBIC module, which is used to connect the branch center DGS-3312SR and distant campus buildings, such as the auditorium in the topology map; provides a 24-port 10 / 100Base-TX interface module Connect the office area, classrooms and network management workstations in the main building.
The branch center switch adopts DGS-3312SR, which uses 2 1000Base-LX aggregation links between 2 single-mode Gigabit MinGBIC modules and DES-6500 to form a full-duplex 4Gbps backbone, and is connected through several remaining Gigabit interfaces Various buildings on the campus. The branch center switch is equivalent to the transfer station of the campus network, and its efficient operation will ensure that the advantages of the core switch can be extended to each network branch. DGS-3312SR switches can provide 12 dedicated switches with their own dedicated 2Gbps links, support redundant power supplies, adopt a modular configuration, have three-layer data packet routing and extensive management capabilities, which can bring more changes to the sub-central network The versatility and flexibility of the DES-6500 core switch complement each other.
The next step is to connect the building such as the teaching building to the branch center switch through the access switch. This step directly affects the end user's experience in use and management. Therefore, simple and intelligent management and stable performance are emphasized. The D-Link DES-35 series of stackable switches is used in the solution. This is because the DES-35 series uses the latest independent IP management technology of D-Link, which can be completed by running a web browser on a workstation with a unique IP address. Access to the network, monitoring and real-time debugging. This technology not only can effectively save IP addresses, but also can achieve centralized, graphical and batch-based concise management, and improve the accuracy and efficiency of management.
In order to ensure that some applications with special needs are fully met, such as the school ’s digital library needs more support in network transmission, the D-Link medium-sized campus network solution has been fully considered, and the DGS-3324SR 1000 is additionally configured in the network center Mega Layer 3 switch is connected to the server group through the 24 1000Base-T interfaces provided by the switch, and realizes the need for gigabit access to key users. This approach not only ensures that different types of application needs are fully satisfied, but also ensures that the school's network resources can be efficiently and reasonably used, saving the investment cost of the campus network.
Simple and efficient management will help campus network users to better play the role of the network. Therefore, in this solution, the D-Vision network management system is installed in the network management workstation to monitor and manage all network devices. This set of network management system based on Windows NT platform is quite complete in function and very practical. D-Link has been tailored to the five major functional domains (performance management, configuration management, fault management, billing management, and security management) of the ISO network management model according to the actual needs of campus network users, so that the system supports all Chinese The management interface is convenient for users. Because the network management system has good compatibility, it can not only easily manage D-Link network equipment, but also can well support any other network equipment with general SNMP function, and provide the entire network topology and common network management information, so that The network implements the "vertical + horizontal" management feature, making network management and maintenance easier.
Finally, we must connect the completed campus network with the education metropolitan area network and the Internet. If you plan to establish a backup link and want to increase your Internet access autonomy, the school can apply for a leased DDN leased line from the local telecommunications operator, and use the D-Link DI-2621 router to achieve dedicated line access. DI-2621 provides one 10 / 100Base-TX Ethernet port, which can be connected to the backbone of the campus network, and provides four WAN interfaces to connect to the Internet. In addition, one ISDN module can be installed for link backup as required. In order to ensure network security, prevent external intrusions, and control the access behavior of internal users, a powerful DFL-1500 firewall was installed between the router and the campus network.
Through the above four steps, a complete and efficient medium-sized campus network can be built, and the interconnection with the metropolitan area network and the Internet can be achieved. Various information of the school can be aggregated to form a share and be instantaneous with resources outside the campus. Communication, and with the help of the network as an information platform, it provides a powerful platform for the school's office, management, teaching and other daily content.
Customized features, ideal choice
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