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System Administration Guide: Advanced Administration

ProcedureHow to Set the Baud Rate Speed on the ttymon Console Terminal

This procedure shows how to set the baud rate speed on the ttymon console terminal. Support for console speeds on x86 based systems are dependent on the specific platform.

The following are supported console speeds for SPARC based systems:

  1. Become superuser or assume an equivalent role.

    Roles contain authorizations and privileged commands. For more information about roles, see Configuring RBAC (Task Map) in System Administration Guide: Security Services.

  2. Use the eeprom command to set a baud rate speed that is appropriate for your system type. 


    # eeprom ttya-mode=baud-rate,8,n,1,-

    For example, to change the baud rate on an x86 based system's console to 38400, type:


    # eeprom ttya-mode=38400,8,n,1,-

  3. Change the console line in the /etc/ttydefs file as follows.


    console baud-rate hupcl opost onlcr:baud-rate::console

  4. Make the following additional changes for your system type.

    Note that these changes are platform-dependent.

    • On SPARC based systems: Change the baud rate speed in the /kernel/drv/options.conf file.

      Use the following command to change the baud rate to 9600.


      # 9600             :bd:
ttymodes="2502:1805:bd:8a3b:3:1c:7f:15:4:0:0:0:11:13:1a:19:12:f:17:16";

      Use the following command to change the baud rate speed to 19200.


      # 19200            :be:
ttymodes="2502:1805:be:8a3b:3:1c:7f:15:4:0:0:0:11:13:1a:19:12:f:17:16";

      Use the following command to change the baud rate speed to 38400.


      # 38400            :bf:
ttymodes="2502:1805:bf:8a3b:3:1c:7f:15:4:0:0:0:11:13:1a:19:12:f:17:16";

    • On x86 based systems: Change the console speed if the BIOS serial redirection is enabled. The method that you use to change the console speed is platform-dependent.