Router basic configuration

You need to master the basic configurations of the vro. First, let everyone know the basic configurations and network construction of the vro, and then give a full introduction to the physical connections and configurations of the vro. In today's era of rapid network development, routers play an important role. Because the router acts as a relay system in the network layer.

Basic router configuration and Network Construction

To build a network, you must have a clear understanding of the network structure in the application, correct physical connection, IP Address Allocation in the router, Wan routing protocol selection, and LAN access are all important in practical applications. The following are three main aspects that we have summarized through experiments to make the entire network run.

1. physical connection between networks

In our experimental environment, the simplest point-to-point environment is used to connect the Wide Area Network Ports of two routers through a MODEM for data transmission. The MODEM is connected to a twisted pair wire (direct line), and the bandwidth of the line transmission is also required. At the LAN port, the router is directly connected to a microcomputer. However, in practical applications, it is often not just two routers connected, or multiple routers, switches, hubs, and so on. This depends on the network structure to determine the quantity and location of network devices, and further consider according to the environment and requirements.

Ii. Basic vro Configuration

Today's vro not only includes the concept of data forwarding and route conversion, but also implements a variety of meanings and functions, such as security restrictions and traffic control. Therefore, here we will briefly introduce several steps to implement the original functions. First, enter the port mode to give each wide area network port and Ethernet port an IP address and the corresponding Address Mask. Secondly, we need to set the link transmission encapsulation protocol for bandwidth and data at the wide area network port (HDLC and PPP protocols are used in the experiment respectively ). Finally, you need to configure the routing protocol. In a large network, there are many different protocols (Static Routing, dynamic OSPF, and VPN) available ). However, we chose CISCO's proprietary dynamic routing protocol (PDUS.

3. user terminal settings

For the convenience of the experiment, we have only placed a Microcomputer In the Ethernet to connect to the Ethernet port. All devices connected from the Ethernet must specify an IP address and the same network segment as the Ethernet port of the router. At the same time, the Ethernet port of the router is used as the gateway, in order to ensure normal information exchange between the Ethernet and the Internet segment.
After the above three configurations, the lab network can run. PING command can be used to check whether two computers can communicate normally. However, in the course of the experiment, there are still many things to pay attention to in each of the above aspects. The following are some of our experiences in the experiment.

1. ASCOM connected to the wide area network is smart. Therefore, after the connection, the two MODEM clock can be synchronized before communication. However, you must note that the MODEM can be customized or manually set. When the transmission rate of the MODEM is changed, the link is automatically disconnected, the slave MODEM will re-Synchronize the clock with the master MODEM to communicate at the new rate.

2. in the port status check of the basic router configuration, when the interface is connected to the downlink device, the port is UP. When the downlink device is enabled, and the connection link protocol is configured, the Protocol Status of the port is UP.

3. When configuring the routing protocol, if the protocol is not UP, check that the basic configuration of the router is UP, but the link is disconnected. This is because the router does not transmit the route information of the connected device to the route table of the connected router, when forwarding data, you can only find the directly connected CIDR Block through the route table of the connected router, but cannot find the CIDR block address of the next hop. Only when the protocol runs normally and the router learns the route in the network through the routing protocol can the obtained data be forwarded to the next hop. Note that when using the routing protocol, the network number is specified to use the entire network of the routing protocol.