Usually you will have to use a null modem cable (the same thing as a cross-over-cable for Ethernet). Now's the time to connect your device if not already done. You can also try to let RouterOS guess the needed baud rate by setting port set serial0 baud-rate=19200 data-bits=8 parity=none stop-bits=1 What settings you need to use depends on the device you connect: Using the following command you will set your serial port to 19200 Baud 8N1. Next you will have to configure your serial port according to the serial port settings of the connected device. If you are on a device with only one serial port (like all RouterBoards, WRAP/ALIX boards etc.) you will have to disable the system console on this serial port:īe sure to just disable the console rather than removing it, as RouterOS will recreate the console after the next reboot when you really remove it. Please note that there are some #Caveats you should be aware of! Take your time understanding those limits to avoid strange things to happen when connecting a device to a serial port on a RouterBoard.įirst you have to have a free serial port to use for this. Unfortunately RouterOS doesn't provide commands to write/read the serial port directly. There's also a nasty workaround for sending text out over a serial port.

as if it were connected to a physical COM port of your PC.

by opening a telnet/ssh session that will get you directly on this device (without having to login to RouterOS first).

directly from a RouterOS console or telnet/ssh login (i.e.

You can use RouterOS to access another device (like a switch, for example) that is connected through a serial cable I try to sum up those possibilities here. There are other and more advanced uses for serial ports. This is one of the ways to do the basic configuration on your RouterOS device after installation (i.e.

On every RouterBoard or other system you will have a RouterOS login prompt on serial0 (the first serial interface). The most obvious (and default) usage is the serial console for RouterOS. Usage possibilities for serial ports in RouterOS 5 Accessing a serial device as if it were physically connected to your PCs' COM port.4 Accessing a serial device directly by SSH / telnet / mac-telnet.3 Accessing a serial device from within RouterOS.1 Usage possibilities for serial ports in RouterOS.

Serial port emulator mac