In-depth analysis of Cisco router configuration instances

By understanding Cisco router configuration instances, we believe that users who use Cisco routers will have a better understanding of Route configuration. Cisco vro configuration instance-the use of Reverse Multiplexing with the development of the information age, digital lines provide many excellent features, such as fast speed, stable performance, and reasonable price, the data transmission media is in the ascendant and growing at an astonishing speed, and has a dominant position.

However, due to the technical reasons of the access device, the rental fee of the Digital Line cannot increase proportionally according to the actual bandwidth of the leased line, but is much higher than the actual bandwidth increase ratio. For example, the monthly rental fee of a 2 M Digital Line is 100000 Yuan/month. The monthly rental fee of a 8 M Digital Circuit at this price should be 400000 yuan/month, but it is actually quite different. In addition, because the price difference between 2 m photon panels and 8 m photon panels is large, many users are also discouraged. Furthermore, because the access capability of the line provider is limited, they may not be able to provide such bandwidth lines as 4 M and 8 M. Various situations indicate that the dial-out problem of large bandwidth lines has severely restricted users' demand for higher bandwidth.

The emergence of the problem will inevitably lead to corresponding solutions to the problem. One of the simplest and most direct methods is to use multiple low-bandwidth 2 M lines to meet the user's needs for high-bandwidth 8 M lines. However, new problems are born again. Theoretically, four 2 m lines equals one 8 m line, but in practical application, such a mathematical equation is not true. The problem must be solved by line multiplexing. However, the price of multiplead is eye-catching and is unacceptable to users.

The real problems are once again in front of us. We must find a different way to solve the problem, with the support of the technology network user Guangzhou Information Center, we finally found the answer on the Cisco router configuration instance: the "Inverse MUX Application using Multilink PPP" function of the Cisco router provides the best way to solve this problem. Next we will use a simple example to further describe the usage of this function:

 
 

  
  
RouterA RouterB  
  
  
hostname RouterA  
  
  
username RouterB passWord abc  
  
  
ip subnet-zero  
  
  
multilink virtual-template 1  
  
  
!  
  
  
interface Virtual-Template1  
  
  
ip unnumbered Ethernet0  
  
  
ppp authentication chap  
  
  
ppp multilink  
  
  
!  
  
  
interface Serial0  
  
  
no ip address  
  
  
encapsulation ppp  
  
  
no fair-queue  
  
  
ppp multilink  
  
  
pulse-time 3  
  
  
!  
  
  
interface Serial1  
  
  
hostname RouterB  
  
  
username RouterA password abc  
  
  
ip subnet-zero  
  
  
multilink virtual-template 1  
  
  
!  
  
  
interface Virtual-Template1  
  
  
ip unnumbered Ethernet0  
  
  
ppp authentication chap  
  
  
ppp multilink  
  
  
!  
  
  
interface Serial0  
  
  
no ip address  
  
  
encapsulation ppp  
  
  
no fair-queue  
  
  
ppp multilink  
  
  
pulse-time 3  
  
  
!  
  
  
interface Serial1  
  
  
no ip address  
  
  
encapsulation ppp  
  
  
no fair-queue  
  
  
ppp multilink  
  
  
pulse-time 3  
  
  
!  
  
  
interface Serial2  
  
  
no ip address  
  
  
encapsulation ppp  
  
  
no fair-queue  
  
  
ppp multilink  
  
  
pulse-time 3  
  
  
!  
  
  
interface Serial3  
  
  
no ip address  
  
  
encapsulation ppp  
  
  
no fair-queue  
  
  
ppp multilink  
  
  
pulse-time 3  
  
  
!  
  
  
interface Ethernet0  
  
  
ip address 10.17.1.254 255.255.255.0  
  
  
!  
  
  
router ripnetwork 10.0.0.0  
  
  
!  
  
  
end  
  
  
no ip address  
  
  
encapsulation ppp  
  
  
no fair-queue  
  
  
ppp multilink  
  
  
pulse-time 3  
  
  
!  
  
  
interface Serial2  
  
  
no ip address  
  
  
encapsulation ppp  
  
  
no fair-queue  
  
  
ppp multilink  
  
  
pulse-time 3  
  
  
!  
  
  
interface Serial3  
  
  
no ip address  
  
  
encapsulation ppp  
  
  
no fair-queue  
  
  
ppp multilink  
  
  
pulse-time 3  
  
  
!  
  
  
interface Ethernet0  
  
  
ip address 10.17.2.254 255.255.255.0  
  
  
!  
  
  
router ripnetwork 10.0.0.0  
  
  
!  
  
  
end  
  
  
 
 
 

Through this method, we can combine multiple low-bandwidth lines into one line and transmit data through the Virtual port Virtual-Template 1. According to the instance configuration of the Cisco router, we will find that when the port status is displayed as sh interface), an additional port Virtual-Access 1 is displayed out of thin air, the data traffic on this port is equal to the total traffic on each actual port, and the data traffic is evenly allocated to each actual port. To merge low-bandwidth lines.