Lapb Parameters Configuration, Frame Settings | Kentrox AI296

AI296 Version 9.8x User’s Guide

Link Configuration: LAPB Parameters Configuration

LAPB Parameters Configuration

The following settings are used to configure LAPB parameters for an MLT or X.25 link:

zFrame Settings

zInterface Mode

zLAPB Timer Settings

zN2 Retry Counter

Frame Settings

Description

Frame settings are configured using three menu items:

zFrame Level Disconnect—Specifies the level at which a disconnect frame is sent. The following options are available:

z Active—Specifies that a disconnect frame (DISC) is sent and an unnumbered acknowledgment (UA) must be received to acknowledge that the link is disconnected. Some systems do not acknowledge the DISC frame with a UA but send a set asynchronous balanced mode frame (SABM) instead. To bring this link up, the system must be configured for a passive disconnect. If a remote system fails to respond to a receive ready (RR) frame enough times to exceed the maximum number of accepted retransmissions for unacknowledged frames (described in section N2 Retry Counter on page 6- 50), then AI296 sends DISC frames continuously.

z Passive—Specifies that the DISC frame is not sent. AI296 responds to an SABM with a UA. If a remote system fails to respond to an RR frame enough times to exceed the maximum number of accepted retransmissions for unacknowledged frames, then AI296 sends SABM frames continuously.

z Other—Specifies that an immediate disconnect frame (DISC) is sent if an RR has been sent enough times to exceed the maximum number of accepted retransmissions for unacknowledged frames and no reply has been received.

zFrame Window Size—Specifies the number of frames the link can send before receiving confirmation that the first frame has been received correctly. This means that data can continue to flow in situations where there may be long turn-around time lags without stopping to wait for an acknowledgement.

Menu Item Type

Toggle for frame level disconnect

Data for frame window size

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Kentrox AI296 manual Lapb Parameters Configuration, Frame Settings

Contents

AI296TM Page About this Document Convention Meaning Document ConventionsLabels Tip Iii Ground Caution Proper Cooling Caution Electrostatic Discharge Caution FCC Warning Web Site Support Customer AssistanceEmail Support Phone Support Table of Contents Exiting the Menu System AI296 Local Menu System AI296 Link Types Asynchronous Asynchronous PPP HDLC-Bridge IP Over X.25 Subnet Configuration TOC-4 TID Multiplexing Diagnostics for TID Multiplexing AI296 Commands Appendix a AI296 System Codes AI296 Commands AI296 Menu Aliases FTP Sessions Appendix B Standalone Mode and Switch Mode Product Description Features Remote and Local Configuration Performance Monitoring, Maintenance, TroubleshootingStandalone Configuration Link-to-Link Call Routing TID Multiplexing System Diagnostics AI296 Hardware Components Links 13-16 Connector Links 5-8 ConnectorLinks 1-4 Connector Links 9-12 Connector Component Description Technical Specifications Description Specification Individual Port AccessCAB257 Cable DP196 Distribution Panel Pin Signal Direction DB-25 Connectors Displays the RJ45 10BaseT connector Pin RJ45 10BaseT Connectors Asynchronous to TCP/IP Application Typical Applications Illustrates a common IP over X.25 application IP Over X.25 Networks AI296 Version 9.8x User’s Guide Mixed Asynchronous and X.25 Network Mixed Asynchronous and X.25 Networks AI296 Version 9.8x User’s Guide X.25 to TCP/IP Application To TCP/IP Application Illustrates a common X.25 trunking application Trunking AI296 Version 9.8x User’s Guide Using the AI198TM Menu System Accessing the Menu System Menu Numbering Structure Navigating the Menu SystemTypes of Menu Items Following four types of menu items are available Toggles SubmenusData Menu re-appears with the entered IP address Functions Menu Item DescriptionsMenu Item Description Exiting the Menu System AI296 Local Menu System Radius Authentication Multilevel User Name and Password SecurityTACACS+ Authentication PPP Authentication Protocols PAP and Chap Logging Into AI296 Using a Telnet Connection for Login Consecutive failed login attempts Using an Asynchronous Port for Login Number of consecutive failed login attempts Accessing the Local Menu System Identifying Types of Menu Items Navigating the Local Menu SystemData Entry Items Direction Keys Toggle Items Send Accessing the Help Menu Save the changes Exiting the Local Menu System System Configuration Destination Menu Break Sequence General System Properties ConfigurationDescription Format Menu Item Type Configuration in the AI198 Menu System Ethernet Port Settings Configuration in the AI296 Local Menu SystemToggle for both menu items This menu item sets the FTP server port number FTP Port This example displays 16 FTP port number set to IP Settings Menu Item Types Access Menu Passive Link Settings Access the System Menu Default is NoMinimum value is 25 seconds and the default is 60 seconds This item sets the system prompt value in the CLI System Prompt TCP Settings ToggleTo on This item sets the Telnet port value for AI296 Telnet Port This example displays Telnet Port set to Server Settings Radius Configuration Enabled To configure the shell/FTP Radius option Access Menu FALLBACK. The default is DisabledShell/FTP Options Enabled TACACS+ Configuration Shell/FTP Options 00049 Snmp Configuration Authentication TrapsAI296 Local Menu Item Configuration Data for all menu items Community Names WriteComm Menu Following example displays Node Information Contact Persons Snmp Manager 10.65.32.4 IP Address Settings Static Route Configuration TID to Modem Mux Configuration Inactivity TimeoutFollowing are available Initialization String This example displays Inactivity Timeout set to Port Bit Settings This example displays Init String set to conn23Toggle for all menu items TID to Route AI296 Local Menu Item Configuration Daylight Savings Time Time Configuration Sntp Settings Access the Time Menu located under the System Menu Settings Time Zone IP Over X.25 Subnet Configuration Before Configuration Configuration Overview Local IP Address for this Subnet Local Settings Local IP Subnet Mask Local X.25 Link Number This menu item configures the local IXE doorway link number Remote IP Address for this Subnet Remote Settings Remote X.121 Address 93.67.158.56 Link Configuration AI296 Link Types AI296 has six configurable link typesAsynchronous Asynchronous PPP Synchronous PPP HDLC-Bridge See Also BX.25 Configuration BX.25 Configuration Values UsageDefault is Enabled BX.25 Modulo BX.25 Support This example displays BX.25 Support set to Enabled BX.25 Timer Settings 00033 Access Menu For 02 Alias, enter 2, and the alias name Connect Options ConfigurationAlias Link Type Availability This example displays 02 Alias set to async.4.1 Call Retry Interval This example displays 03 Call retry interval set to Connect String When Connection settings are configured using three menu items Connection SettingsDefault is OFF Is on 00030 Link Application Destination AppAlias Disconnect Options Configuration Disconnect Inactivity Timer SettingsDisconnect inactivity timer when the link receives a call Select on or OFF. The default is on This example displays Off. The default is On This example displaysIs Off Disconnect Settings Disconnect settings are configured using two menu itemsDefault is on Disconnect String Disconnect General Link Properties Configuration Auto Disable Error LimitAsync, AsyncPPP, HDLC-Bridge, MLT, SyncPPP, Async and AsyncPPP Flow Control Access the Link Menu Hardware Interface Interface TypeThis example displays SW Flow Control set to XonXoff This example displays Interface Type set to Interface Mode Access menu 4.2.11.12.8 for MLT or menu 4.2.11.12.7 forMLT This menu item defines a description for a link Link Description This example displays Link Description set to New X.25 Link Link Mode Link Number This example displays 05*Link mode set to Passive This menu item enables or disables a link Link StateThis example displays 01 Link number set to This example displays Link state set to Down Link Type Passive Link with Clocking Default is Disabled This menu item defines the number of databits in a data byte Port Data Bits This example displays Port data bits set to Seven Port Parity This example displays Port parity set to Odd Port SpeedThis menu item defines the baud rate for a port Data in the AI296 local menu system Hdlc Menu 4.2.11.12.5 appears Port Stop Bits This menu item sets the binary encoding on a port Sync Port Encoding Aysnc and AsyncPPP Xon Repeat Interval This example displays 10 Xon Repeat interval set to Ipcp Address Settings General PPP Properties ConfigurationFollowing menu items are available for PPP configuration AsyncPPP and SyncPPP Ipcp Address Parameters Set to Maximum Unit Settings For an Ipcp network control protocol Network Control Protocol Ipcp Frame Settings Lapb Parameters Configuration Size set to For Frame Window Size, enter the window size. The default is Lapb Timer Settings N2 Retry Counter 150 Modem String Modem Option Configuration Dialing Time-out Interval This example displays Dialing time-outset to Number of Dial Attempts This example displays Number of dial attempts set to Modem Setup Menu Local Authentication Settings PPP Authentication Configuration PAP RAS Option Radius Remote Authentication Settings Chap Quick X.25 Configuration Active Number of PVCs Packet Settings This example displays Number of PVCs set toToggle for max packet size Data for packet window size 128 256 512 Normal Passive Extended SVC Settings This example displays SVC Low set to 250 and SVC High set to Local Address This example displays X121 Local Address set to RTS/DTR Lead Control Configuration DTR State ConfigurationAsync and AsyncPPP and SyncPPP RTS State Configuration Flow Control DTR connect state Off DTR disconnect state Maximum Packet Size Parameters Configuration This example displays Max Packet Size set to Packet Window Size This example displays Packet Window Size set to Protocol Version Counter Settings Default is This example displays Facilities Negotiation Timer Settings 12,90000 Parameters Menu 43729 Virtual Circuit Configuration PVCs are configured using four menu items PVC Configuration Settings Menu PVC Type LCN Range CallTmr ResetTmr PVC Type Timer Type Range Default For Timer Value, select the timer interval value Passive Reset Timer This example displays SVC Configuration Settings Menu Item Type 0005 TID Multiplexing Overview AI296 Version 9.8x User’s Guide TID Multiplexing Configuration Configuring the Parent AliasMenu appears Values are 1 to Destination TidforAI296 Defines the terminal identifier for AI296 Configuring the Children Aliases During the parent alias configuration TIDtid For Alias name, enter Example Configurations YES Alias Edit Menu Alias Name 172.16.1.23#1000 TL1DM.1 Alias Edit Menu Alias Name Parameters TID Multiplexing TroubleshootingNormal Response Format Response Item Description Normal Response Example Error Response Format Diagnostics for TID Multiplexing Error Response ExampleErrcde AI296 Version 9.8x User’s Guide Alias and Call Routing Configuration Incoming Outgoing DownstreamCall AI296 Card B IP address Tocardb X25.2.67891 Call Routing Configuring an Alias in the AI198 Menu System AI296 Version 9.8x User’s Guide Configuring an Alias in the AI296 Menu System Alias Edit Menu Arranging Aliases in the Alias Table Configuring an Alias with X.25 Keep-Alive Where Notifies the 296 that this is the X-25 keep-alive feature Source/Destination Protocol Tables Source Destination Menu Item Information Asynchronous Source Without Breaks AI198Async 25 SVC Following options are available Async With Following options are available TL1 Break Asynchronous Source With Breaks AI198Packetized On a CR Option X.25 SVC Source Without Breaks AI198 Called X.25 SVC Source With Breaks AI198Packetizing With async Break Address Async Call data Time 25 PVC 25 SVC Alias name X.25 PVC Source Without Breaks AI198Called Following options are available Address 25 PVC Alias name 25 PVC Async break Called 25 PVC Async with Alias name25 PVC TL1 PAD TL1 TCP/IP Source Without Telnet Breaks AI198 TCP/IP Source With Telnet Breaks AI198 Async Alias nameWith Called Following options are available Break Address With Called Async with Alias name Async break CalledAsynchronous Source Without Breaks AI296 Async 25 PVC Alias name Async 25 SVC Alias name Protocol Async 25 PVC Alias name 10 Asynchronous Source With Breaks AI296Async With Called TL1 Break Async Address Packetized Call data 11 X.25 SVC Source Without Breaks AI296 Break Address Caller’s 12 X.25 SVC Source With Breaks AI296 14 X.25 PVC Source With Breaks AI296 13 X.25 PVC Source Without Breaks AI296 15 TCP/IP Source Without Telnet Breaks AI296 16 TCP/IP Source With Telnet Breaks AI296 Async with Alias name Module Types Protocol Processing Modules Aepx Prevents the PAD protocol from passing breaks upstream Enables Macstar compatibilityPrevents the PAD protocol from passing breaks downstream Causes the PAD protocol to reply to X.25 breaks Provides packetizing and sets the packetizing timer to An X.25 when X.3 parameter 3 is set toTo zero, the option is turned off Specify up to 16 characters Feed and delete Carriage return and semi-colonProvides packetizing but prevents breaks from being Propagated upstream To zero, this option is turned off Seconds Provides TL1 packetizing and sets the packetizing timer toFeed and delete Provides TL1 packetizing and prevents breaks from passing Module Arguments Module Properties Entry Description Alias Macros Start SymbolsAlias Macro Components Comments Constants Wildcard SymbolsVariables Variable Value Operator Description Operators Alias Macro Function Description of Operation 20 Alias Macro FunctionsReturns the Ascii integer value of the first Character in a string 20 Alias Macro Functions Match any of the expressions, then default isReturns characters from string starting with Xth character and continuing to the right-most end Configuration Examples Alias Macro Configuration =LA,PA,’#’,1-1=MYIP1 Alias Configuration Examples SVC to SVC ConnectionExamples are given for the following connections TL1 SVC to PVC Connection SVC to PVC Connection Diagram PVC Called address PVC to SVC Connection 16.X25.2.3 MLT Call Routing Example MLT Route MLT6 Link-to-Link Routing Example Menu F1 Help F2 Send F4 Close Ctrl-R Return to Main Menu AI296 Commands Shell Commands Commands OverviewShell Connections Establishing a Local Shell Connection Establishing a Remote Shell Connection Displaying winslc Command Logging Winslc CommandsUsing winslc Commands Log/Alarm Message Header Header Element Description Aaa Command TypeFormats Shell Async-Enables or disables TACACS+ authentication on All-Enables or disables TACACS+ authentication on allDisable-Disables TACACS+ authentication Enable-Enables TACACS+ authentication AI296 Version 9.8x User’s Guide AI296 Version 9.8x User’s Guide Examples Command Defaults AAA Alarm HyphensFollowing parameters is accepted Self-clearing alarms clear themselves when the problem that Alarm groupCaused the alarm is resolved Unmask. Valid values are existing alarm groups This example displays all system alarms in group links This example displays alarms for links 5-8in group linksThis example displays all alarms by severity level This example displays the unmasking of alarm group links Arp Command Types Column Description 296arp -d Mapping for 10.40.53.2 deleted Break 296break 10.40.5.11#1821 Breaking connection 10.40.5.11#1821 This example displays the dumping of the bridge table Bridge To reset error counters for links 1, 2, CresetReset error counters for links 1 Example, 1,2-3 to reset error counters for links 1, 2, Date Debug This example displays the enabling of all debug data logging Delete This command deletes a specified file that resides on AI296Filename Defines the name of the file to delete This example displays the deletion of file log.txt Display Item Description Diag-conn Displays details for that connection This option prompts for the ID of the connection to viewPattern 1, Logic 2, and Pattern 3 are evaluated before Logic 4 and Pattern 5 are considered Diag-eth Using Interpretation Mode Using the Help Option Adds a filter Following formats apply to filtersDeletes a filter Defines the source address MAC, IP, or TCP/UDP Defines the TCP/UDP port number regardless MAC/IP address settingsAdds or deletes a specific protocol filter. Available Protocol filters are This example displays Ethernet diagnostic help information Ijkl FF FC This example displays the deletion of all filters This example displays the deletion of filter protocol tcp Diag-info Means the X.25 frame level is not established Displays the link numberMeans the X.25 frame level is established Buffers were available Rebooted Last rebootedDisplays the name of the Streams resource Displays the number of free or available Streams resources Displays the state of the driver. Two states are available Connection to be enabledSpecifies that the link is not established Displays the number of bytes coming into the link Displays the number of frame length violations Had CRC errorsReceived packets Displays the number of short received frames Connection Displays the number of frames received onDisplays the number of bytes received on Displays the number of times transmitted frames Displays the number of transmit errors that have occurred Does not indicate an errorDisplays the number of frames received on the connection Displays the number of bytes received on the connection Displays the number of alignment errors ErrorsExcessive deferral timer is exceeded. An excessive deferral Error is recorded when the following events occur Displays the current state of the Ethernet interface. Ethernet interface needs to be resetFollowing values may appear Ethernet interface is uninitialized Option Function Diag-line Diag-line Displayed as Ascii String Only present in data packets, then the data byte count is Baseport Defines the baseport number for AI296 Diag-tconn This example displays all available files Dir This example displays an exit from the current shell session Exit Defines the number of lines to display. The default is This command displays the first few lines of a fileHead Defines the name of the file to display Help This example displays a list of all available commands This example displays help information for command show This command displays the current user name and profile Formats ExamplesThis example displays the current user name and profile This example displays the configured IP address information Ip init Enter IP Address Range default 1 Setting range to 296 Link This example displays the stopping of links 6 This example displays the starting of links 1 through 4 For the AI296 system command This command displays link statistic informationLinkstat Baseport Indicates the baseport number of AI296 C D 9600 RS-232 @AI198154041 072204 Sev=F Base=064 Msg Log This command turns the display of log messages on or off This command closes a shell session LogoutThis example displays the closing of a shell session This command displays a list of available files This command accesses the AI296 main menu system MenuThis example displays the AI296 Main Menu More Pad Enables the transparent mode of operation Resets the current callThis example displays the setting of the PAD profile Sets page wait to n lines Panic This command forces AI296 to crash dump and haltWinslc Baseport Defines the AI296 baseport number Passwd This command changes an existing user’s password Ping Pppstatus IP address of AI296 if the link status is Running Displays one of the following Profile Command Type shell FormatsProfilename-Defines the name of a user profile Have write permission Newprofile-Defines the name of a new user profile Lists all user profile namesRemoves a user profile. The following parameter is accepted Pvcedit Forces the PVC to become passive This example displays PVC information for link Pvclist Column Description Reset This command resets AI296This example displays the resetting of AI296 This example displays AI296 receiving two files from a PC Configuration file SelcnfCnf extension Sholog PDisplays the content of the file one page at a time Displays comments ShowDisplays all active connections Displays crash dump information Displays the default and backup gateway IP address MAC address when in standalone modeDisplays WAN diagnostic information Displays link data. The following parameters are accepted This example displays the serial link performance for links This example displays the AI296 version number This command displays the status of the EIA leads StaeiaLead is negated CTS Standalone This example displays the current standalone mode status Staslc Displays the number of parity errors Is asserted and means the signal is negatedDisplays the number of framing errors Displays the number of overrun errors Syncflash Sz filename Tacacs TACACS+ server This example displays a TACACS+ debug log fileDisplays the number of failed connection attempts that were Made to the TACACS+ server When AI296 attempted to read a packet from the TACACS+ Displays the number of errors that occurred when AI296Were received when AI296 attempted to read them from Configuring the time out value, refer to command aaa on Tacacs server Account-Enables or disables the accounting phase for Configures the AAA phases that are allowed for specifiedAll-Enables or disables all AAA phases for the specified Authen-Enables or disables the authentication phase for Disabled Associated servers are enabled + or disabledDisplays the server numbers. The +/ signs indicate if Servers Displays the TACACS+ shared secrets passwords for specified Tail This command displays the last few lines of a fileSpecifies that a line number value will be entered This example displays the last 10 lines of file userlog.txt Tcpoutconn Tftp Tftp 106 File Downloaded successfully 296 Tftpboot 109 Timezone 111 Default TracePriority Level This example displays the configuration of trace This example displays the traceroute to IP address Traceroute Defines the file for which you want to view the contents TypeDisplays text from the file one page at a time Defines the source file to copy Update Uptime Profilename Permission Useradd Description of Permissions Profilename Specifies a user who can only execute the following commands Userdel Users Who Xvc 124 This appendix provides information about AI296 system codes AI296 System Codes Cause Codes and Diagnostic Codes Standard Reset Indication Cause CodesCause Code Description 0X1D Reset due to network out of order Kentrox-Specific Reset Indication Cause Codes0x9B Remote DTE originated reset Standard Clear Indication Cause Codes Standard ISO Diagnostic Codes Ccitt Diagnostic Codes0x39 Ship absent 0x7F Registration/cancellation confirmed Cause Code Description Cause Code Description Kentrox-Specific Diagnostic Codes Error Code Description Hexadecimal Decimal Crash CodesCommon Crash Codes AI296 Crash Codes System Failure Crash Reports Kentrox Technical Support AI296 Version 9.8x User’s Guide Standalone Mode and Switch Mode Downloading Software for a Standalone AI296 Standalone ModeAt the FTP prompt, open AI296 Transfer the software image to AI296 Configuring BOOTP/TFTP Switch Mode Downloading Software for AI296 in Switch ModeAt the FTP prompt, open AI198 Defines the software image file name Transfer the software image to AI198 AI296 Version 9.8x User’s Guide Commands for AI296 TACACS+ Server Enhancements Following keyword lets users access destinations AI296 Commands Menu Menualias AI296 Menu Aliases Following AI296 keywords apply to FTP access Provides FTP read accessFTP Sessions