论文部分内容阅读
目前,高校校园网基本上都采用双WAN链路接入互联网。一条链路接入中国教育与科研网(简称CERNET), 另一条链路为其它运营商(如中国电信或网通)提供的接入。电信或网通通常采用包月计费,不计流量,而教育网则不同,有些高校采用不计流量包月计费,而有些高校只针对特定的教育网服务器不计流量,对其它教育网服务器的访问按流量计费。因此各高校都根据内网源IP地址及目的IP地址在网络出口设备上设置策略路由,节省上网费用的同时,使到达教育网和Internet的访问走最佳访问路径。
Currently, university campus networks basically use dual WAN links to access the Internet. One link connects to China Education and Research Network (CERNET) and the other link provides access for other operators (such as China Telecom or China Netcom). Telecom or China Netcom usually uses monthly billing, regardless of traffic, and education network is different, some colleges and universities use not counting traffic monthly billing, and some colleges only for a specific education network server does not count the flow of visits to other education network server by flowmeter fee. Therefore, all colleges and universities set the policy routing on the network exit device according to the source IP address and the destination IP address of the intranet to save the cost of accessing the Internet and at the same time, make the best access to the education network and the Internet access.