Server User Manual

70 Sun Fire V20z and Sun Fire V40z Servers, Server Management Guide • May, 2004
Serial Over LAN
The Serial Over LAN (SOL) feature lets servers transparently redirect the serial
character stream from the baseboard Universal Asynchronous Receiver/Transmitter
(UART) to and from the remote-client system over LAN. Serial over LAN has the
following benefits compared to a serial interface:
■ Eliminates the need for a serial concentrator.
■ Reduces the amount of cabling.
■ Allows remote management of servers without video, mouse, or keyboard
(headless servers).
Serial over LAN requires a properly configured LAN connection and a console from
which an ssh session can be established.
In a Linux environment, you can use a shell such as csh or ksh as your console.
This console works well in a scripting environment in which you might want to
monitor many servers.
Enabling or Disabling the SOL Feature on the Server
Note – When the SOL feature is enabled, you cannot access the server through the
external DB9 serial port (COM A).
Note – The variable spuser is the user account created when securing the SP. The
variable spipaddr is the IP address assigned to the SP.
For more information, see “Initial Setup of the Service Processor” on page 9.
You can enable or disable the SOL feature through the SP.
Enabling the SOL feature
To enable the feature, run the following command:
# ssh -l spuser spipaddr platform set console -s sp -e -S 9600