Multi-interface Host IP routing configuration (1)

The campus network of our school is a node of the education network. It has two outlets, one is the education network outlet and the other is the telecom network outlet. The Network egress selection policy is: to access the nodes in the free address list published by the tutorial network, go to the tutorial network egress; otherwise, go to the telecommunication network egress through the proxy server. Because the degree of interconnection between the tutorial network and the public network is not high enough, users of the public network access the telecommunication network much faster than those of the tutorial network. For important servers facing the public network, we will consider setting up an additional telecom network interface so that these users can access it from the education network and the telecom network.
To make it easier for college users to purchase instruments and equipment, we have built a bidding website for Instruments and equipment using Windows 2000 servers on the campus network. After registering as a member of this site, university members can request to purchase equipment online, and supplier members can bid for a certain device online according to the given requirements within a period of time. As the business volume increases, the scope of supplier members is also expanding. Many vendors access the website from public networks outside the tutorial network, and the response is slow, the website cannot be connected at critical moments. In view of this situation, we have opened a carrier network interface for this server, as shown in topology 1.
After an extra Nic is installed on the server, configure the NIC parameters according to the basic items in the NIC attribute: IP address, subnet mask, default gateway, and DNS server. After the server is configured, We Ping the Intranet campus network on the machine) gateway and Internet Telecommunication Network) gateway, both of which are displayed as normal, so that the configuration is correct, inform the relevant users that they can select the access points for accessing the website based on their network. Add an interface to the server to connect to the telecommunication network. users on the public network can access the service without having to go through the tutorial network. However, contrary to the past, there are still many users who tell us that they are very slow to access the bidding website of the instrument and equipment. We feel that this network card has not yet played a proper role.
Check the cause of the fault. Ping the Intranet interface of the server on the host of another network segment in the intranet. Ping some suppliers from the server, and most of them return the Request timed out information. As long as it involves nodes other than the tutorial network, the connectivity is much worse. Using Route Print to display the Route table, we found that there are two Default routes in the Route table, their next hop is the Gateway of the Intranet and the Internet respectively), and the effective Default Gateway) at this time, it points to the Intranet gateway, and we have seen the gateway pointing to the Internet. No matter where the Default Gateway points, the request package can come in from two interfaces. However, the response package has only one exit, but it does not implement the goal of where to go and where to go. Obviously, the problem lies in the IP Route configuration.

 
Figure 1 campus network border Topology