1. Project Introduction
The overall introduction of the affiliated school park of Jiaotong University:
1. Established the Network Center Platform and Campus Local Area Network System of Jiaotong University Affiliated High School. At the same time, it realizes high-speed backbone connection with Xi'an Jiaotong University and accesses Cernet through Xi'an Jiaotong University.
2. A teaching assistant system platform has been established to provide rich audio and video materials for classroom teaching in real time. At the same time, build a hardware platform for remote interactive teaching and correspondence education course management.
3. Established a relatively closed hardware platform for teaching, logistics and party and government management database system within the campus.
4. Simultaneously implement four wiring projects of computer local area network wiring, closed circuit television wiring, broadcast wiring and telephone wiring. Build a basic line platform for data, video and voice transmission.
The specific implementation of the campus network of the Affiliated High School of Jiaotong University:
1. The network center is placed on the third floor of the experiment building. The network combines Gigabit Ethernet technology with ordinary Fast Ethernet technology. Gigabit Ethernet technology is adopted to ensure the transmission of data with the network center of Xi'an Jiaotong University. Adopt hybrid fast Ethernet technology to ensure 100M transmission of backbone data and realize 10M exchange to desktop.
2. The network uses Cisco network equipment to the desktop to achieve 10 / 100M connection. The network center is responsible for the access and management of the entire campus network. The network center selects four servers as domain name, WWW server and mail, OA server, IP / TV server and proxy server.
3. According to different user groups, divide multiple VLANs in the network to achieve the isolation between different user groups. At the same time, the three-layer switching technology is used to realize the communication between the relevant VLANs. It not only guarantees the security and confidentiality of the network, but also greatly improves the utilization efficiency of network resources and avoids the waste of network resources.
4. The network center sets up multiple network servers to provide services such as CISCO IP / TV video service, WWW, and E-Mail within the park. Realize the functions of network video on demand, broadcasting and real-time playback in the park. At the same time, the WWW server can be used to publish the school's own homepage, which will raise the school's publicity and communication work to a new level. The E-Mail service within the park makes the electronic office between schools inevitable.
2. Product Application Introduction
Cisco Catalyst 2948G-L3
The network center selects a Cisco2948G-L3, which is responsible for the access and management of the entire campus network. Provide Gigabit interconnection interface with Xi'an Jiaotong University network center.
Cisco Catalyst 1924C
A CISCO Catalyst1924C switch was selected to meet the 100M fiber access requirements of the rear teaching building. At the same time, a 100M RJ45 to FX (SC) fiber repeater was selected in the center to realize the 100M fiber interconnection between the post-teaching and the network center.
Cisco Catalyst 1924
All other buildings use CISCO 1924, which is cascaded with the central switch 100M, and is responsible for the access of switches and information points on each floor of the building. Realize the exchange of 10M data of each information point in the campus to the desktop.
Cisco IP / TV
Adopting Cisco IP / TV products to realize the network video-on-demand function in the campus, providing sufficient network conditions for e-learning. At the same time, it also realizes the broadcast function of network video in the park, which can broadcast video programs on the network regularly or randomly. While realizing the functions of network video on demand, broadcasting, etc., using Cisco IP / TV products has also successfully achieved real-time live capture and real-time playback.
3. The Network Planning of Affiliated High School of Jiaotong University
On the principle of system security design, Cisco believes that in a large and loose campus network, it is far from enough to use the host security protection scheme. The attacker ’s illegal access should be rejected by the network before reaching the host, so the campus network also needs Network security protection to achieve secure access control between internal and external subnets.
Based on the above considerations, Cisco decided to divide the office application servers distributed on different nodes in different departments into a virtual subnet to restrict access to this subnet. Except for some related port services that are open to the school, others are prohibited. , Not just rely on the security protection of the server itself. Another example is that some workstations require direct access to outside the school. Cisco divides it into a certain VLAN and grants the VLAN different external access rights. For example, it can only access the school, or only the China Education and Research Network, or the entire Internet. This design 'S campus network has good security.
Campus network with multiple application functions
One of the purposes of the Xiamen campus network expansion is to ensure a stable and high-speed network environment for office automation and teaching throughout the school. The completed Xiamen University campus network is a broadband network. Gigabit Ethernet technology can be selected on the backbone, that is, between the network center and the main node. The bandwidth from the main node to the sub-node is more than 100M, or a higher aggregate bandwidth. The upgraded campus network can provide users with a variety of broadband applications, such as office automation throughout the school, distance learning, student online learning, multimedia teaching plans, etc., which greatly stimulates students' interest in learning and improves the quality and effectiveness of teaching. According to the requirements of China Education and Research Network, the campus network will add multiple server guarantees.
Manageable campus network
In view of the fact that the upgraded campus network uses all Cisco equipment, it needs to achieve flexible and convenient compatible management with the existing network management platform IBM Netview, to achieve graphical remote management, logical topology discovery, device physical connection discovery, event discovery, etc. , You need to flexibly divide different virtual subnet VLANs according to different strategies, such as binding an IP subnet to a port, so that the workstations under the port can only use the assigned IP range, and limit IP mixing to a small range, such as a department, In a laboratory. Another example is that there are many sub-departments of the department in different places on the campus. What Cisco needs to do is to connect the networks of these different sub-departments into an internal network of the department.
The end-to-end Xiamen University campus network designed and constructed by Cisco has provided a high-bandwidth, highly reliable network platform for Xiamen University, and provides backbones for Gigabit Ethernet, 10M / 100M to the desktop, VLAN division, management, QoS (quality of service), multimedia teaching, layer 3 switching and other services, due to the selection of appropriate switches in the program, flexible and convenient implementation of high-bandwidth applications such as virtual networks across the school and multimedia remote teaching, fully meets Xiamen University ’s Expected design requirements.
In the campus network construction of Xiamen University, Cisco's full range of routing and switching products are used, such as GSR 12012, 6500, 4000, 3500, 2900, etc. Xiamen University expressed satisfaction with Cisco's full support for the education industry and its sincere cooperation in this cooperation. They expressed that they will carry out deeper cooperation with Cisco in the fields of network technology education, scientific research and application development in the future. Cisco also said that it will continue to promote the development of network technology in domestic education and do its part for China's informatization construction.
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