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Avocent CCM1640, CCM840 To access port history mode:, To clear and discard all data in a port history buffer:, To control the port history buffer display when you connect:

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36CCM840/1640 Installer/User Guide

To access port history mode:

Issue a Port History command.

PORT HISTORY

The PORT HISTORY > prompt appears.

To control the port history buffer display when you connect:

Issue a Server CLI command, using the History parameter to specify the Hold or Auto option:

SERVER CLI HISTORY=HOLDAUTO

•If Hold is speciﬁed, the number of bytes in the history buffer is displayed, but none of the history data is output. In this case, you must access the CLI and use the Port History command to view the port’s history buffer content. This is the default mode.

•If Auto is speciﬁed, the number of bytes in the history buffer is displayed and the entire content of the buffer is output to the Telnet session. In this mode, the history buffer’s content may be reviewed in the Telnet client’s scrolling window. You may also use the Port History command to view the port’s history buffer content.

To control the port history buffer content when you end a session:

Issue a Server CLI command, using the History parameter to specify the Clear or Keep option:

SERVER CLI HISTORY=CLEARKEEP

•If Clear is speciﬁed, the port history buffer is cleared and all data is discarded at the end of a session.

•If Keep is speciﬁed, the port history buffer’s content is retained at the end of a session.

To clear and discard all data in a port history buffer:

Issue a Clear command while you are in port history mode.

CLEAR - or -

Issue a Server CLI command, indicating History=Clear.

SERVER CLI HISTORY=CLEAR

In this case, the port’s history buffer is cleared at the end of each device session.

Contents

Page Page Page Page Table of Contents Page 1 Product Overview Page Chapter 1: Product Overview Features and Benefits Safety Precautions Rack mount safety considerations Using AVWorks Page Installation and Configuration Page Chapter 2: Installation and Configuration Hardware Overview Installing the CCM Configuring the CCM Configuring the IP address and subnet mask To conﬁgure the IP address and subnet mask using a Telnet CLI: To conﬁgure the CCM using the serial CLI: Initial CCM login Reinitializing the CCM 3 Operations Page Chapter 3: Operations Overview Configuring Serial Port Settings Connecting to Serial Devices Connecting to devices using Telnet Connecting to devices from the serial CLI port Configuring and using dial-inconnections Connecting to devices using PPP Connecting to devices using SSH SSH Authentication Methods Page Enabling plain text Telnet and SSH connections Telnet CLI mode Ending device sessions Session time-outs Managing User Accounts To change a user’s conﬁguration information: To end another user’s CCM session: To delete a user: To display user conﬁguration information: Access rights and levels Using Authentication Modes Authentication summary Using Security Lock-out Managing the Port History Buffer Using port history mode commands Port History Mode Commands To access port history mode: To control the port history buffer display when you connect: To control the port history buffer content when you end a session: To clear and discard all data in a port history buffer: Managing the CCM Using SNMP To add or delete SNMP management entity addresses: To enable or disable SNMP traps: To add or delete SNMP trap destination addresses: To add, copy or delete port alert strings: To display SNMP conﬁguration information: To display port alert string information: 4 Using CCM Commands Page Chapter 4: Using CCM Commands Accessing the CLI Entering Commands When commands take effect Understanding Conventions Command syntax Page Syntax conventions Command Summary CCM Command Summary (Continued) Page Page Page 5 CCM Commands Page Chapter 5: CCM Commands Connect Command Disconnect Command Help Command Port Commands Port Alert Add command Port Alert Copy command Port Alert Delete command Port Break command Port History command Port Logout command Port Set command Page Quit Command Resume Command Server Commands Server CLI command Server FLASH command Server PPP command Server RADIUS command Server Reboot command Server Security command Server Set command Server SNMP command Server SNMP Community command Server SNMP Manager command Server SNMP Trap command Server SNMP Trap Destination command Server SSH command Show Commands Show Port command Page Show Port Alert command Show Server command Show Server CLI command Show Server PPP command Show Server RADIUS command Show Server Security command Show Server SNMP command Show User command SPC Command User Commands User Add command Page User Delete command User Logout command User Set command User Unlock command Page Appendices Page Appendices Appendix A: Technical Specifications Appendix B: Device Cabling Page RJ-45modular adaptors and cables Page Appendix C: Ports Used Appendix D: Technical Support