Detailed knowledge of Cisco router configuration and console connection

The market demand for Cisco routers has been very high. Here we mainly analyze the detailed knowledge of Cisco router configuration and RJ45 console connection, for accessing and configuring I0S on a new router, we must communicate with the Console port.

After connecting a console terminal with the Console port configured by the Cisco router, you can start to communicate with the router. This type of terminal can be a non-intelligent ASCII terminal, such as the old-fashioned VTl00, or a computer, such as our personal computer (PC ). If you plan to use a PC as a terminal, you must run a terminal simulation software on the PC. You can use the terminal keyboard to access the I0S command that you want to execute. Many people use PCs as terminals to complete 10 s of configuration tasks. The PC is usually equipped with at least two serial ports, CoMl and COM2. The DB9 public connector (DB9M) is often used in the serial port of some PCs, but a DB25 public connector (DB25M) is also used in the serial port of some PCs ). A serial line connects the Console port to the terminal. In Table 2-1, we have summarized the cable types required for the two types of Console port connectors.

RJ45 console connection

The RJ45 connector looks like a telephone connector used at home, but it must be wider. The telephone connector (the small crystal head at the end of the telephone line that can be inserted into the telephone outlet) contains four wires, and RJ45 uses eight. The so-called rolover Cable looks like a Cable between a phone and a wall-mounted telephone outlet, just a little wider. This name is called because the wire it wraps is a Roll 0ver, from one end to the other. For routers equipped with RJ45 Console ports, in their boxes,. Cisco generally provides reverse cables and at least one adapter (adapter ). With this adapter, RJ45 can be smoothly inserted into the serial port on the terminal. On the adapter, one side is an RJ45 socket to meet the RJ45 connector of the reverse cable; the other side is the DB9 connector (9-pin DB9F connector) or DB25F (25-pin connector ), to insert the serial port on the terminal.

If the serial port of the terminal is equipped with a DB9M (9-pin public outlet), use a RJ45-DB9F adapter. Insert one end of the reverse cable into the Console port of the router. The Console port of a vro usually has an "Internet Explorer" mark or an abbreviation of "Internet Explorer. Insert the other end of the reverse cable into the RJ45 socket on the adapter (adapter. Then, insert the DB9F header of the adapter into the 9-pin serial port of the terminal. If the terminal serial port is equipped with a DB25M (25-pin public outlet), use a RJ45-DB25F adapter. Insert one end of the reverse cable into the Console port of the router. Insert the other end of the reverse cable into the RJ45 socket on the adapter (adapter. Finally, insert the DB25F header of the adapter into the 25-pin serial port of the terminal.

DB25 console connection

For routers with a DB25F console connector, you must configure a signal cable for the Cisco router. At one end of the cable, there must be a DB25M connector, and the other end must have a connector (DB9F or DB-25F) that matches the serial port of the terminal ). The signal transmission in this cable should be "straight through. Insert the DB25M header of the straight-through serial communication cable into the Console port of the router, and then insert the other end into the serial port of the terminal.

Software connection

As mentioned above, if the terminal used for 10 s configuration is a PC, you must run the terminal simulation software so that we can enter 10 s commands and view IOS information. The source of the terminal simulation software is very wide. It can be found in software supermarkets and sharing software download websites. Many times, you can find that your PC has installed a terminal simulation software, which saves a lot of trouble. Examples of I terminal simulation software include HyperTerminal (created by HHgraeve) procomm (developed by DataStorm Technologies) and Kermit. In general, personal preferences and whether the software is easy to find are the decisive factors for choosing the terminal simulation software. Start the terminal simulation software on the PC. If you use a non-intelligent ASCII terminal for console communication, you do not need to run special software. The default connection speed of the Cisco router Console port is 9600 port. You only need to configure your Cisco router to run at a rate of 9600 port, use 9 data bits, no parity check, and 2 Stop bits (that is, 9600-8N2 ), you can communicate with the vro through the Console port (sometimes only one stop bit, that is, 8N1, is also feasible ).