With the development of China's access industry, we have also promoted the upgrade of the ADSL Broadband Access Network Technology. Here we mainly analyze how the ADSL Broadband Access Network is more worry-free. This document describes how this alternative connection method provides multi-Wan port access services.
 
First, let's take a look at the four LAN interfaces of the Broadband Router. LAN1 provides access to the connected device. When the connected device has a network request, it will send a request packet to the LAN1 interface. According to the working principle of the Broadband Router, when there is a need to access the Internet, data packets will be directly sent to the WAN interface, and the current WAN interface is connected to the LAN2 interface through a network cable, so that the data packet is successfully sent to the LAN2 interface.
 
After the data packet arrives at the LAN2 interface, the four LAN interfaces are considered as a broadcast area, similar to the switches we usually use. Then each interface will receive the Internet access request, this triggers Dial-Up On The LAN3 and LAN4 interfaces, further facilitates the dial-up connection network of the ADSL Broadband Access Network, and thus completes the data packet routing function smoothly.
 
To put it bluntly, we can regard the entire dialing process as sending data requests to a switch with four Ethernet interfaces rather than a Broadband Router, so that data packets will be broadcast to each Ethernet interface of the switch, complete dialing and network access services.
 
 
Tips
 
In addition, because our ADSL Broadband Access Network supports multi-account and multi-dialing, we can implement the multiple dialing functions for different network accounts for one ADSL Broadband Access Network, in this way, we can modify the network topology mentioned above, saving the ADSL cat connected by the LAN3 interface, and only using the LAN4 interface to connect to the ADSL cat, however, in this way, you must ensure that your ADSL Broadband Access Network can be used for secondary dial-up and that the bandwidth after the dial-up connection can be doubled.
 
Summary
 
Although the alternative connection method can save the enterprise's network operation cost to the maximum extent and avoid the overhead of purchasing additional equipment, it can also smoothly implement the function of merging and accessing multiple lines, however, he also has some shortcomings. First, because we use a Broadband Router and do not have multiple WAN ports, it will be tricky to manage multiple WAN ports and route selection, after all, the built-in functions of the device do not have relevant parameter settings. In addition, this connection causes data packets to circle, which affects the network speed to a certain extent, increase the number of broadcast packets on the four interfaces of the home Broadband Router. Of course, I want to introduce this method in a hope that it will be able to provide some valuable results, so that more enterprise network administrators can consider the problem and have a more flexible connection network topology.