Network management experience: enterprise-level routers can also play with ADSL

As the most common broadband access service, ADSL is widely used. For home users, the ADSL access method is the best choice. It is highly cost-effective in terms of bandwidth and price. However, for small and medium-sized enterprises that have Internet cafes, due to the large number of internal computers, the use of ADSL access seems to be somewhat slow, so such as DDN, optical fiber, ATM and other leased line access are popular in these places. However, many small and medium-sized enterprises and Internet cafes still use the ADSL access method as the backup line for primary access to ensure the smooth connection of the enterprise network and ensure that the Internet can still be accessed when there is a problem with leased line access. Most enterprise-level routers are configured in the Command window. Therefore, the configuration of ADSL access is different from that of common home broadband routers. Today, I would like to invite you to take a full look at how enterprise-level routers can turn into ADSL.

Most configurations of enterprise-level routers are completed through the Console port connection management-level comport, And the ADSL configuration commands for enterprise-level routers of different manufacturers are also different, I will take Cisco and Shida vro as an example to introduce that their products are quite popular. Of course, if your company uses products from companies such as Huawei 3COM, you can modify the corresponding commands on your own.

Step 1: ensure that the other parameters of the vro are completely set. After the Console Management line is connected, connect the enterprise-level vro through the Super Terminal.

Step 2: run the int XXX command to access the interface connecting to the ADSL cat, and then run pppoe enable to enable the virtual dialing function such as PPPOE.

Step 3: by default, enterprise-level routers automatically dial PPPOE. Therefore, after enabling the PPPOE dialing function, you must bind the corresponding port to the specified dialing pool, this dial-up pool is used internally to differentiate different dialing processes. The specific command is to execute pppoe-client dial-pool-number 1 dial-on-demand in the corresponding interface mode, where 1 corresponds to the dial-pool-number dialing pool number ). If you enter pppoe-client dial-pool-number 1 no-ddr, the system performs automatic connections during dial-up. When you start the system, the system will dial up instead of dialing as needed.

Step 4: In addition to enabling the dialing process and function on the physical port, we also need to set the PPPOE Virtual Interface. All PPP negotiation for PPPOE dialing is based on the logical interface. In Global mode, enter the following command.

Interface dialer 1 // enter the specified virtual dialing interface 1, which corresponds to the number of dialer-number)

Ip address negotiate // The address is obtained by PPPOE after negotiation.

Dialer pool 1 // The associated dialing pool 1 is the number of pool-number)

Dialer idle-timeout 120 // The maximum idle time configured is 120 seconds. This parameter is optional. If this parameter is left blank, the connection is always enabled.

Encapsulation ppp // set the encapsulation mode to PPP

Mtu 1492 // set the maximum transmission unit to 1492. Generally, the maximum value of 1492 can be smaller than 1488, but cannot be greater than 1492. Otherwise, communication will fail. For accuracy, contact your ISP for MTU value.

Dialer-group 1 // set the rule to stimulate dial-up, that is, who can initiate the dial-up on demand, where 1 corresponds to the number of dialer-group.

Ppp pap sent-username softer password 111111 // configure the user name used for PAP authentication as softer and the password as 111111

Ppp chap hostname softer // configure the CHAP authentication username as softer

Ppp chap password 111111 // configure the CHAP authentication password to be 111111

Step 5: If the PPPOE dialing method is on-demand dialing, you must add the rule that triggers the dialing, run dialer-list number dialer-group protocol-name permit | deny | list access-list-number | access-group in global mode.

Step 6: Finally, set a route pointing to the ADSL Virtual Interface to enable normal packet forwarding. The specific command is ip route 0.0.0.0 0.0.0.0 dialer-number. Of course, you do not need to configure the dial-up route as the default route. You can configure the route as needed. However, you must configure a dial-up Route in any case, otherwise, the dial-up operation cannot be completed smoothly or data cannot be transmitted even if the dial-up is successful.

Enterprise-level routers set up the PPPOE dialing content of the ADSL line. In general, it is relatively simple. Of course, some Internet-level routers have a graphical setting interface, it is easier to configure ADSL in this interface. However, daily maintenance and some advanced parameters cannot be added or modified on the graphical interface. Therefore, we recommend that you use the PPPOE dialing command in the Command Prompt window, let's complete the ADSL line Setting task from the graphical interface.

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