Avocent CPS1610, CPS810 Managing the Port History Buffer, Using port history mode commands

28CPS Installer/User Guide

configure a lock-out period of from 1-99 hours. Specifying a lock-out period of 0 disables the feature; that is, users will not be locked-out.

A locked-out user will remain locked-out until the specified time elapses, the CPS appliance is power-cycled or the user is unlocked by an administrator with the User Unlock command. A user with the ADMIN access level may unlock all users except a user with the APPLIANCEADMIN level. A user with the APPLIANCEADMIN level may unlock all users.

To enable or disable security lock-out:

1.To enable security lock-out, issue a Server Security command, using the Lockout parameter with a value between 1-99.

2.To disable security lock-out, issue a Server Security command, using the Lockout=0 parameter.

To unlock a locked-out user:

Issue a User Unlock command with the username.

Managing the Port History Buffer

Each CPS appliance serial port has a circular history buffer that contains the latest 64K bytes of data received from the attached serial device. This information may be helpful in analyzing attached device anomalies.

The history buffer begins filling with received data upon completion of CPS appliance initialization, even if no user is connected. When you connect to a serial port, the data that was received from the attached serial device prior to the connection is available in the buffer. Once online, new data continues to be stored in the buffer. You may choose whether to display the history buffer’s content automatically when you connect and whether to keep or discard the history buffer’s content at the end of a session.

When more than 64K bytes of data are sent to the history buffer, data at the top of the buffer is discarded to make room for the new data. As a result, the buffer always contains the most recent 64K bytes of port history.

Using port history mode commands

Once you are in port history mode, you may issue the commands listed in Table 3.4. Only the first letter of the command is required.

Table 3.4: Port History Mode Commands

Command	Description
Bottom	B sets the view location to the bottom of the file minus 23 history display lines, if available.
Clear	C clears the port history buffer.
Next	N increments the current history display line by the number of lines per page and outputs a
	new history display page.