The introduction of IP gateways and PPPoE dormitory network can choose export - the campus network, campus - Education Industry
Authentication problems Campus dormitory network is an important part of the network, campus network management is important and difficult, but also a reflection of the students on the network where the most intense.
Students to network and application requirements differ from common carrier users, more applications, higher bandwidth, more stable network, and the needs of different users are different. Emphasis on college campus Technology The research and development, promotion and application, and network density is much higher than the operator, which determines the university's campus network operator model can not operate.
On the college dormitory network structure, the general can be divided into two types combined with the campus office network, mixed operation, unified authentication and accounting. Second, with the telecom operators Cooperation Separate network, the network operator directly exports through a separate link with the school office network connectivity, single authentication and accounting. Either the structure of the network is still unable to meet the needs of students, or reflect the Wang Suman, either to reflect application of too little, network instability, the persistence of user and network management needs inconsistencies.
Different bandwidth requirements China Oil University (East China), Qingdao campus network construction in 2003 and put into operation, using the network topology of three-tier structure, namely the core layer, convergence layer and access layer. From the campus network topology perspective, China University of Petroleum (East China), Qingdao campus network does not distinguish between network and office network of student hostels, two core Switch Connecting a number of units under the cluster office switches and two student dormitory network aggregation switch, the school configure ospf dynamic routing, including routing to the line of Dongying campus. In the operating level, the unit monthly office network system, is not required; student dormitory network users free of charge Visit Campus network resources, but need access to Internet authentication and accounting, billing two inconsistent operation of the network, so the entire campus network using the two networks and the export of the office of student hostels to distinguish between network traffic, office network through the core switch direct access to multiple export Router Furthermore, the student dormitory network by aggregation switch - certified equipment - Export router access to Internet. In order to get better network performance, the outside router in exports also flow control devices to restrict network traffic and shaping.
According to the analysis, the network needs of students can be divided into two types: 1. Web-based HTTP protocol, and QQ instant messaging tools such as services, such services on the network applications demand much network bandwidth do not ask, network stability do not ask; 2. online game and movie download services, such services require the agreement of many types, network stability and the delay is small, but high requirements for network bandwidth. China University of Petroleum (East China), user demand for these two operators to launch joint IP-based gateway and PPPoE authentication mode between two services, the former category of users can continue to use the original IP gateway authentication mode, then type the user is You can use PPPoE authentication mode.
Choice of two certification IP Authentication Gateway mode: the ordinary Ethernet technology, the client automatically get DHCP Server The private network IP address allocation, IP authentication gateway installed in the student dormitory network exports. Have been installed in the network traffic control equipment, on the part of the agreement, such as BT, network television, the restrictions were necessary or even blocked. In this mode, the network vulnerable to ARP and DHCP deception of the virus, network stability is poor, because of network address translation link, speed general. In addition, due to some restrictions on the network application, and some Web applications use ineffective or can not use. Considering the limitations of the network, the network can continue to adjust the cost before fees, maintaining a relatively low level.
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