Serial Line Internet Protocol

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Serial Line Internet Protocol (SLIP) is the protocol which TCP/IP uses when operating through a serial connection.

It is commonly used on dedicated serial links and dial-up connections that operate at speeds between 1200bps and 19.2Kbps or higher.

Note: To use baud rates higher than 38400, specify a baud rate of 50 in the /etc/uucp/Devices file for the desired tty, then change the SMIT configuration for that tty to reflect the actual baud rate desired.

For example. to run the cu command on tty0 with a baud rate of 115200, use the following procedure:

  1. Ensure the hardware supports the baud rate.
  2. Edit /etc/uucp/Devices to include the following line: 
    Direct tty0 - 50 direct
  3. Enter the smit chtty fast path.
  4. Select tty0.
  5. Change the baud rate to 115200.
  6. Exit SMIT.