The console port is connected with the COM 1 port cable of the PC. The default data transmission rate is not fixed.

In general, the console port is the control port of the device, which is directly connected to the serial port of the computer by a dedicated connection, and the router is configured locally by a terminal emulation program (such as HyperTerminal under Windows). The console ports of routers are mostly RJ-45 ports.

Extended data:

trouble shooting

1. Repair the damaged console. The console port is generally controlled by the serial port chip of the router motherboard (generally the serial port control chip of Philips), and there are mainly four pins (in the order of Cosole line):

TxD (sending), RxD (receiving), DSR (sending ready) and DCD (carrier detection), check these four pins and chips on the router motherboard, and if there is no problem, you can eliminate the physical fault. Most of the cases are caused by virtual soldering and poor contact of RJ45 pins.

2. Bypass the damaged console: If it is found that it is caused by a physical fault that is difficult to repair or other reasons, you can access the configuration file through the AUX port, but you can't see the startup process. If you accidentally delete the configuration file, it will be miserable.

However, Cisco IOS versions above 12.2 have the function of automatically configuring the router through DHCP and automatically downloading the configuration file on the TFTP server to the router. Make the Ethernet port, VTY password and enable password valid again, so that you can regain control of the whole router, and of course you can enter from AUX port after recovery.

It is worth noting that the DHCP server needs to specify the address of the TFTP server and configure the TFTP server option with the option code of 150.

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