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Avocent CCM1640, CCM840 Connecting to devices using PPP, To display modem conﬁguration information:, To enable or disable a PPP server on the serial CLI port:

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22CCM840/1640 Installer/User Guide

To display modem conﬁguration information:

Issue a Show Server CLI command.

SHOW SERVER CLI

For more information, see Show Server CLI command in Chapter 5.

Connecting to devices using PPP

The CCM supports remote PPP access using an auto-answer modem that answers calls. A dial-in client and the CCM establish the PPP protocol.

The PPP dial-in may be used to access a remote CCM that does not warrant a WAN (Wide Area Network) link to the Ethernet interface. In this case, the PPP connection allows a remote PC with Telnet capability to dial the CCM and then establish a Telnet connection to a CCM port.

The PPP dial-in may also be used to access a subnet containing remote CCM devices in the event of a WAN link failure. In this case, the PPP provides an alternate path to one or more remote CCM devices.

Once the PPP connection is established, you must launch an application that connects to the CCM or to one of its ports. The PPP connection is only a communications interface to the CCM.

The CCM implements a PPP server that uses CHAP (Challenge Authentication Protocol). Passwords are not accepted in the clear on PPP connections.

PPP is disabled by default.

To enable or disable a PPP server on the serial CLI port:

1.To enable a PPP server on the serial CLI port, issue a Show Server CLI command to ensure that a serial CLI port has been deﬁned.

SHOW SERVER CLI

2.Issue a Server PPP command with the Enable parameter.

SERVER PPP ENABLE LOCALIP=<local_ip> REMOTEIP=<rem_ip> [MASK=<subnet>]

You must specify local and remote IP addresses to be used for the CCM and client ends of the PPP connection respectively. You are prompted to conﬁrm or cancel the changes. Enter Y to conﬁrm or N to cancel.

3.To disable a PPP server, issue a Server PPP command with the Disable parameter.

SERVER PPP DISABLE

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