Cabletron Systems Cabletron CyberSWITCH CSX5500 User Manual

Also see for CyberSWITCH 5500: Quick start Manual

Contents

USER’S GUIDE394 CyberSWITCHIf no data is received within the data timeout duration, the following events will occur:• If Disconnect is configured, the CyberSWITCH will disconnect the call.• If Use PPP Protocol is configured, the CyberSWITCH will assign the call to a PPP subsystem.• If Use Terminal Mode is configured, the CyberSWITCH will assign the call to the terminal I/Osubsystem and/or the user-level authentication server.DATA TIMEOUT VALUEDetermines how long (in seconds) the CyberSWITCH will wait to receive data during autosensemode. If the configured time expires, the CyberSWITCH will take configured action for theconnection. The minimum value is 1 second; the maximum value is 60 seconds. The default is 30seconds.Note: This timer starts at the beginning of a call and includes the time for the modems tonegotiate (typically 10-12 seconds). Be sure to allow for this additional time to avoid theAction on Data Timeout before negotiation is completed.After terminal-user authentication, this timer restarts. The CyberSWITCH returns toautosense mode again and if no data received, the user will need to reauthenticate.TERMINAL SERVER SECURITYSpecifies which type of user-level authentication server to use for terminal mode connections. Theselections are: RADIUS, TACACS, ACE, Use Administrative Login or Do not allow terminal access. TheUse Administrative Login value will present terminal users with a normal CyberSWITCH adminlogin prompt. The Do not allow... value will not permit terminal access upon data timeout and willdisconnect the call. The default is Do not allow terminal access.BACKGROUND I NFORMATIONThis feature supports the ability to handle terminal mode connections via dial-up client softwarepackages, such as WIN95 Dial-up Networking. Terminal mode connections are useful forauthenticating remote modem users via user-level authentication, then providing PPP protocoldata communications. It also provides a means of system management using a remote console. ForX.25 users, it provides remote modem users a means of access to different X.25 services.When an incoming connection is established to the CyberSWITCH, system software autosenses thetype of connection. The system looks at the first few bytes of received data and determines whetherthe connection is terminal mode or PPP mode. If no data is received within a configurable amountof time, the system takes action based on one of the following configured parameters:• PPP Mode: normal CyberSWITCH authentication and data forwarding procedures apply to thisconnection• Terminal Mode: connection processed by CyberSWITCH I/O subsystem which handles charac-ter-oriented data. Connection assigned to user-level authentication task. Authentication pro-cess proceeds per configured user-level authentication parameters and method of operation.If authentication fails, the connection is released as per the configured authenticationparameters.If authentication succeeds, the authentication task completes its functions such as displayingthe message of the day. Once authenticated, control passes to a PPP subsystem and theconnection enters PPP mode. Device-level authentication and protocol stream handlingproceeds per configured device information.