Route sharing, recommended for ADSL Modem (1)

For users with multiple computers in their homes who need to share the Internet, you can generally create and configure a proxy server to share the Internet. The disadvantage is that the host must be on for sharing; another effective method is to use vrouters for sharing so that each client can access the Internet independently. The disadvantage is that expensive routing devices need to be added. In fact, some adsl modem itself has the routing function, as long as the user can correctly configure the relevant parameters to share routes, there is no need to add additional devices. Most of the modems provided by domestic ADSL service providers have built-in routing functions. However, due to technical reasons, a small number of ADSL modems have designed routing functions on hardware, however, the random modem software does not support using this function in the PPPoE virtual dial-up access mode. Only leased line users with fixed IP addresses can use the routing function, you can use the PPPoE access method only if the service provider's local device is a product of the same brand. In this case, you need to upgrade the modem software before using the built-in routing function. (1)

Figure 1

1. Key parameters:According to the instructions provided by the merchants, enabling the adsl modem routing function is not difficult, but there are several key data that need to be well grasped.

1), VPI (Virtual Path Identifier), VCI (Virtual Channel Identifier ). VCI and VPI are the marks for DSLAM to identify the ADSL lines of various ATM terminals. To share ADSL routes, you must know the PVC value of this ADSL line, in particular, the VPI and VCI data. It is not difficult to know the data of the local VPI and VCI. First, you need to know the built-in IP address of the ADSL Modem. For example, the built-in IP address is 192.168.1.1. In the network, change the IP address corresponding to the network card to 192.168.1.x (x is an integer between 2 and 255), that is, make the IP address of the network card and the IP address built in the ADSL Modem in the same network segment. Then, access the Internet through virtual dial-up. Enter "192.168.1.1" in the address bar of the I E browser, press enter, and the Modem setting interface will be displayed. In the setting menu bar, find "ATM PVC" settings, after you click it, you will see the VPI and VCI values in the "atm pvc" settings. (2)

Figure 2

2) When configuring an ADSL route, you must enable NAPT. Note that in the "atm pvc" option, you must turn off one of the two activated PVCs; otherwise, you cannot turn on NAPT. In the "atm pvc" option, disable the PVC corresponding to "virtual circuit 1. (Select "no" in the "enable" column). Only the PVC "virtual circuit 0" is retained, and the VPI and VCI values obtained earlier are filled in the corresponding project of the PVC.

3) configure the Internet computer. After configuring the ADSL route, various network cables, and switches, you should also set the Internet computer. The computer mainly sets three items in the network options, they are IP address, gateway, and DNS configuration. Many people make an error when the DNS and ADSL route settings are inconsistent. If no selection is made in the ADSL route settings (DHCP/DNS) ("Lan DHCP server" is not selected "), in the network settings of the computer, the DNS configuration cannot be selected from the DNS of the local ISP. In this case, enter the built-in IP address of ADSL in DNS. That is, in the network settings of the computer, the gateway is the same as the DNS, And the built-in IP address of ADSL (for example, 192.168.1.1 mentioned above) should be entered ), the IP address corresponding to the gateway is in the same network segment (for example, 192.168.1.x) as the built-in IP address of ADSL ).

2. Notes:

1) The entire configuration process is complex and requires a little command operation experience. In particular, be careful before using the save command. Remember the original configuration information.

2) in terms of security, you must modify the default Modem password,

3) if the software fails to be upgraded, you need to fix the software of the MODEM. In this case, you only need to use the TFTP program to re-write the software of the old version prepared when downloading the software package, repeat the software update process to restore the software used by the modem. If the situation is more serious, for example, the software is not properly written due to power failure and the modem cannot be started. In this case, the control port Console of the modem should be used) connect to the serial port of the computer, run the terminal simulation program such as HyperTerminal in Windows) to the modem, enter the command according to the information provided by the modem manufacturer's website or manual, write the old version of software again.

3. Product recommendations

QL1880 (for example)

QL1880

All ADSL products in all directions have passed the national 3C Certification. QL1880 adopts the Globespan technical solution, which is mature and stable. It also optimizes the complex line environment to simplify the configuration and greatly improve the performance. It provides multiple forms of Internet access and allows you to select a routing method, you can also use the bridge mode. You can use a bridge to access the Internet without installing any software. If you use a routing method, you only need to enter the built-in menu of qingtai training shadows for simple configuration. It is easy to manage and use, and has smooth appearance. It is the smallest ADSL access device in China. QL1880 has a small calorific value and low power consumption. multiple sets of PVC parameters are preset to greatly simplify the configuration process. A special one-Click Reset design is provided for users to use when parameter changes are incorrect; the Web-based Chinese configuration interface is simple and clear, reducing the threshold for use. It comes with a 10 M/M Adaptive Ethernet interface to make the connection more convenient. It is compatible with various local devices and supports full-speed transmission. Provides 8 Mb/s high-speed downstream channels and 1 Mb/s uplink speed, which not only meets the needs of common applications such as online browsing and chatting, it also actively supports broadband applications such as VOD, concert hall, and online cinema. Three-year warranty.

Real-time adsl modem EH-S5 such)

Shida EH-S5

2003 the real-time network is very large in the aspect of ADSL Modem, while improving the applicability of the product, but also to impress consumers with fashion. Adsl modem EH-S5 is a SOHO-type adsl modem product. Supports Static Routing, r1_1 V2, Telnet USER command management, and software upgrade and solidification programs. High-speed access to the Internet, multi-user sharing, five Switch ports, up to five users can access the Internet at the same time, all Chinese user interfaces are friendly and convenient, and common telephone services are also supported. Online games, distance education, online conferences, on-demand videos, ICQ, and other multimedia applications. Multi-User bandwidth sharing enables Lan-to-lan and lan-to-Wan access.

"Fast way" adsl modem such)

Speedway ADSL MODEM

In October, Shida Computer equipment company launched the "Speedway" adsl modem flagship boutique series, including AMR-100 route edition, AMR-100 USB edition, AMR-100 SOHO edition and AMR-100 AP edition, to meet the needs of users at different levels. AMR-100 route edition and AMR-100 USB edition for individual users, AMR-100 route edition through 100 M/10 M Adaptive Ethernet port and PC connection, throughput freely, eliminating the port bottleneck, the AMR-100 USB Version supports the installation of USB interface, to bring convenience to users without Ethernet. The flagship series of "fast-track" adsl modem supports multi-interface installation to connect LAN to lan and LAN to wan. Various products are easy to install, configure, and monitor. At the same time, the product has good compatibility and supports various ADSL standards T1.413 and G in the industry. DMT, G. LITE, G. HS); suitable for mainstream operating systems, and has passed compatibility tests of various local devices, with excellent interconnection and interoperability. In terms of network protocols, this series of products support RFC1483 Bridge, RFC1483 Routing, IPOA, PPPOA, and PPPOE Routing, allowing users to easily configure them.