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Use the Point-to-Point Protocol utility (PPPD) to initiate and manage an Internet Protocol (IP) network connection over an asynchronous, serial data line. For example, with PPPD you can: o Establish temporary, high-speed network connections between remote hosts. This includes both dial-in capability from a remote host to OpenVMS Alpha and dial-out capability from an OpenVMS Alpha host to a remote system or server box that supports the Point-to-Point Protocol (PPP). o Establish permanent, low-speed network connections between local hosts, such as between a laptop computer and an Alpha workstation connected by a serial data line. o Set and display communication characteristics, such as address compression, flow control, and line speed. Format PPPD [command] [device-name[:]] 2 Parameters command Specifies one of the following PPPD network commands: CONNECT DIAL_OUT DISCONNECT SET SHOW This parameter is optional. If you omit the parameter, the utility displays its prompt and waits for command input. device-name[:] Specifies the name of a device through which a PPP network connection is being established, maintained, or terminated. This parameter is optional. If you do not specify a device name, the utility performs the related command action on the current terminal device. 2 Usage_Summary To invoke PPPD, enter the PPPD command at the DCL prompt as follows: $ PPPD The utility responds with the following prompt: PPPD> You can then perform PPPD operations by entering the appropriate commands. You can also enter a single PPPD command on the same line as the command that invokes the utility, for example: $ PPPD SET/NETWORK=TCPIP TTB0: To exit from the Point-to-Point Protocol utility, enter the EXIT command at the PPPD> prompt or press Ctrl/Z. Either method returns control to the DCL command level. For information about the PPPD utility, enter the HELP command at the PPPD> prompt. 2 CONNECT Establishes a network connection to a device located on the current physical port or specified remote port. Format CONNECT device-name[:] 3 Parameter device-name[:] Supplies the name of a device through which the network connection is made. The device name has the form ddcu where dd is the device code, c is the controller designation, and u is the unit number. LAN devices are specified as the name of the device which is unit 0. For example, the first terminal device on a LAN is specified as TTA0, the second as TTB0. 3 Qualifiers None. 3 Example PPPD> CONNECT TTA1: %PPPD-I-CONNECTTERM, converting connection on device _TTA1: to a Point-to-Point connection The command in this example creates a temporary network connection to the serial port TTA1. The port is ready to receive the PPP setup negotiations initiated by the host at the other end of the serial connection. 2 DIAL_OUT Provides access to a specific physical device in order to dial a modem or link to an external device. Format DIAL_OUT device-name[:] 3 Parameter device-name[:] Supplies the name of a device over which the network connection is made. The device name has the form ddcu where dd is the device code, c is the controller designation, and u is the unit number. LAN devices are specified as the name of the device which is unit 0. For example, the first terminal device on a LAN is specified as TTA0, the second as TTB0. 3 Qualifiers /BREAK /BREAK=break-character Specifies a character sequence that you can use to interrupt the signal being currently transmitted. To interrupt the signal, type Ctrl/break-character. You can select any ASCII character from @ though Z, except C, M, Q, S, and Y. The default break character is ~. /DISCONNECT /DISCONNECT=disconnect-character Specifies a character sequence that you can use to terminate DIAL_OUT mode. To disconnect the call, type Ctrl/disconnect- character. You can select any ASCII character from @ though Z, except C, M, Q, S, and Y. The default disconnect character is \. /SWITCH /SWITCH=switch-character Specifies a character sequence that you can use to switch the line to PPP mode. To activate PPP mode, type Ctrl/switch- character. You can select any ASCII character from @ though Z, except C, M, Q, S, and Y. The default switch character is @. Similar to the CONNECT command, this qualifier switches a line into PPP mode. If the packet negotiations fail, PPPD exits and the line is left in terminal mode. If line is set to /MODEM and /NOHANGUP, this can result in extraneous data, the ASCII representation of Internet Protocol (IP) packets, being transmitted across the open line. 3 Examples 1.PPPD> DIAL_OUT TTA1: Type control-~ to send a break, control-\ to disconnect, and control-@ to switch to a point-to-point connection. UNIVRS - Unauthorized access is prohibited Username: SEBASTIAN Password: Welcome to OpenVMS (TM) Alpha Operating System, Version 7.1 Last interactive login on Tuesday, AUGUST 13, 1996 02:39 PM Last non-interactive login on Monday, AUGUST 12, 1996 02:16 PM $ PPPD CONNECT %PPPD-I-CONNECTTERM, converting connection on device _TTB0: to a Point-to-Point connection Ctrl-@ %PPPD-I-CONNECTTERM, converting connection on device _TTA1: to a Point-to-Point connection The command in this example initiates an outgoing dialing session through the serial port TTA1 to create a transient point-to-point connection to the device connected to serial port TTB0. 2 DISCONNECT Terminates the current network connection. Format DISCONNECT device-name[:] 3 Parameter device-name[:] Indicates the name of a device over which the network connection occurred. The device name has the form ddcu where dd is the device code, c is the controller designation, and u is the unit number. LAN devices are specified as the name of the device which is unit 0. For example, the first terminal device on a LAN is specified as TTA0, the second as TTB0. 3 Qualifiers None. 3 Examples 1.PPPD> DISCONNECT TTA1: The command in this example terminates the current network connection established through the serial port TTA1. 2 EXIT Stops the execution of PPPD and returns control to the DCL command level. You can only enter Ctrl/Z if the line has not already been switched to PPP mode. Format EXIT 3 Parameters None. 3 Qualifiers None. 3 Example PPPD> EXIT The command in this example leaves the PPPD utility and returns control to the DCL command level. 2 HELP Provides online help information for using the PPPD commands. Format HELP [command-name...] 3 Parameter command-name The name of a PPPD command or PPPD command and command keyword. If you enter the HELP command with a command name only, such as HELP SET, PPPD displays a list of all of the command keywords used with the SET command. 3 Example PPPD> HELP DISCONNECT In this example, the HELP DISCONNECT command produces a description of the DISCONNECT command and shows the command format. 2 SET Sets the communication characteristics for a specific terminal device. Format SET device-name[:] 3 Parameter device-name Indicates the name of the device whose characteristics are to be set. The device name has the form ddcu where dd is the device code, c is the controller designation, and u is the unit number. LAN devices are specified as the name of the device which is unit 0. For example, the first terminal device on a LAN is specified as TTA0, the second as TTB0. 3 Qualifiers /ADDRESS_COMPRESSION /ADDRESS_COMPRESSION (default) /NOADDRESS_COMPRESSION Indicates whether the address and control fields are compressed. /CLEAR_COUNTERS /CLEAR_COUNTERS=(keyword,...) Determines which counters to clear when trying to resolve performance problems. The default is to clear all counters. With this qualifier, you can specify one or more of the following keywords: Keyword Description ALL Resets all counters. BAD_FCS_RCV Resets the count of packets with a bad frame check sequence (FCS). DATA_LOST Resets the count of lost characters that were reported by hardware. DROPPED_CHARS Resets the count of all characters thrown away. FRAMING_ERRORS Resets the count of characters with framing errors. LONG_PACKETS Resets the count of packets longer than the current maximum receive unit (MRU) setting. RECEIVED_ Resets the count of total packets received. PACKETS RUNT_PACKETS Resets the count of packets with too few characters. TOTAL_ Resets the count of all characters received. CHARACTERS TRANSMITTED_ Resets the count of total packets transmitted. PACKETS /CONNECT Sets the line parameters and binds the ASN device to the physical terminal. /ECHO_FAILURE /ECHO_FAILURE=value Specifies the number of Link Control Protocol (LCP) echo requests that must be sent without response before the line is considered down. The default number of echo requests is 0. /ECHO_INTERVAL /ECHO_INTERVAL=msecs Specifies the interval in milliseconds (msecs) between separate LCP echo requests. The default interval is 0. /FLOW_CONTROL /FLOW_CONTROL=control-option Indicates the type of flow control used over the physical link. You can specify one of the following keywords with this qualifier: Flow Control Description HARDWARE Uses RTS/CTS flow control. If using this control, the transmit Asynch Control Character Map (ACCM) can be 0x0, 0x0, 0x0, 0x60000000. Only valid for lines set to /MODEM or /COMMSYNCH. XON_XOFF Uses band flow control. If using this control, the (de- optimal transmit ACCM is 0xA0000, 0x0, 0x0, 0x60000000. fault) Only valid for asynchronous lines. /HANGUP /HANGUP /NOHANGUP Determines the action that occurs when a session is terminated. This qualifier notifies the ASN driver when a modem hang-up is necessary due to an idle device. For example, when the last network connection is closed on a transient line that is set to /NOHANGUP, the line is switches back to the terminal driver but the modem remains connected. This allows users to reaccess the line and log in without having to redial and reestablish the connection. To use this qualifier, you must have PHY_IO privilege or the line must have TT2$M_MODHANGUP already set. /MAGIC_NUMBER_RETRIES /MAGIC_NUMBER_RETRIES=value Specifies the number of attempts made to negotiate a magic number. This number indicates whether there is a loopback transmission. If you specify 0, no negotiations are made. If you specify 255, negotiation will continue until a number is found. The default number of attempts is 5. /MAXCONFIGURE /MAXCONFIGURE=value Indicates the number of configure-request packets sent without receiving a valid configure-ack, configure-nak, or configure- reject before assuming the peer is unable to respond. Specify a value in the range of 0 to 255. The default number of packets sent is 10. /MAXFAILURE /MAXFAILURE=value Indicates the number of configure-nak packets sent without receiving a valid configure-ack before assuming that the configuration is not converging. Specify a value in the range of 0 to 255. The default number of packets sent is 5. /MAXTERMINATE /MAXTERMINATE=value Indicates the number of terminate-request packets sent without receiving a terminate-ack before assuming that the peer is unable to respond. Specify a value in the range of 0 to 255. The default number of packets is 2. /MRU /MRU=size Specifies the largest packet that can be received over the line. This value is used as part of the line negotiation and the actual MRU setting can vary. Specify a value in the range of 6 to 1500. The default packet size is 1500. /MTU /MTU=size Specifies the largest packet that can be transmitted over the line. This value is used as part of the line negotiation and the actual maximum transfer unit (MTU) setting can vary. Specify a value in the range of 6 to 1500. The default packet size is 1500. /NETWORK_PROTOCOL /NETWORK_PROTOCOL=(protocol-name) Specifies the the protocol allowed over the link. The default network protocol is TCP/IP. /PASSIVE /PASSIVE /NOPASSIVE (default) Notifies the PPP driver how to handle the PPP connection. It can either actively initiate the connection or wait for the remote host to start the connection. /PERMANENT /PERMANENT /NOPERMANENT Determines how the link is handled when a connection is closed or lost. If you specify /PERMANENT, the link remains in place with the PPP driver in control. If you specify /NOPERMANENT, the link is treated as a transient connection and the terminal reverts to the terminal driver. /PROTOCOL_COMPRESSION /PROTOCOL_COMPRESSION (default) /NOPROTOCOL_COMPRESSION Specifies whether the two octet protocol fields are compressed into a single octet. /RECEIVE_ACCM /RECEIVE_ACCM=mask-value Identifies the starting ACCM. This mask is used by the PPP driver to negotiate the final ACCM for asynchronous ports. Specify a mask in the range of 0x0 to 0xFFFFFFFF. The default mask value is 0xFFFFFFFF. /RESTART_TIMER /RESTART_TIMER=msecs Interval in milliseconds (msecs) used to time the transmission of configure-request and terminate-request packets. Expiration of the restart timer results in a time-out event and retransmission of the packet. Specify a value from 1 to 90. The default is 30 (3 seconds); which is intended for relatively slow speed links. For smaller, faster links, specify a smaller value. /SPEED /SPEED=(input-rate,output-rate) Allows you to control the input and output speed of the line for asynchronous ports. To use this qualifier, you must have PHY_IO privilege or the line must already have TT2$M_SETSPEED set. Specify one of the following speeds: 50, 75, 100, 134, 150, 300, 600, 1200, 1800, 2400, 3600, 4800, 7200, 9600, 19200, 38400, 57600, 76800, or 115200. If you only specify one speed, it is used for both input and output. NOTE If you specify two speeds, and the line does not allow split speed, the negotiation results are unpredictable. /TRANSMIT_ACCM /TRANSMIT_ACCM=mask-value,... Identifies the starting ACCM. This mask is used by the PPP driver to negotiate the final transmit ACCM for asynchronous ports. Specify a mask in the range of 0x0 to 0xFFFFFFFF. The default mask value is 0xFFFFFFFF, 0x0, 0x0, 0x60000000, 0x0, 0x0, 0x0. The masks are ordered from low-order longword to high-order longword. Specify the longword mask until the last mask bits are set. The remaining longwords are set to 0. With eight longwords, there is one bit for every ASCII character position (from 0 to 255). The ASCII characters 0x20 through 0x3F and 0x5E cannot be quoted. 3 Examples 1.PPPD> SET/PERMANENT TTA1: %PPPD-I-CONNECTTERM, converting connection on device _TTA1: to a Point-to-Point connection In this example, the SET command is setting up a permanent network connection over the serial port TTA1. 2 SHOW Allows you to display the communication characteristics for a specific terminal. Format SHOW device-name[:] 3 Parameter device-name[:] Supplies the name of the device whose characteristics are to be displayed. The device name has the form ddcu where dd is the device code, c is the controller designation, and u is the unit number. LAN devices are specified as the name of the device which is unit 0. For example, the first terminal device on a LAN is specified as TTA0, the second as TTB0. 3 Qualifiers /ADDRESS_COMPRESSION Indicates if the address compression is on or off. /ALL /ALL[=BRIEF] (default) /ALL[=LONG] Displays all the current device and communication settings. Brief formats the output for the screen. Long displays each setting on a separate line. /COUNTERS /COUNTERS=(keyword,...) Shows the current values for the specified counter(s). You can specify one or more of the following keywords with this qualifier: Keyword Description ALL Displays all counters. BAD_FCS_PACKETS Displays the count of packets with bad frame check sequence (FCS). DATA_LOST Displays the count of lost characters that were reported by hardware. DROPPED_ Displays the count of all characters thrown CHARACTERS away. FRAMING_ERRORS Displays the count of characters with framing errors. LONG_PACKETS Displays the count of packets longer than the current maximum receive unit setting (MRU). RECEIVED_ Displays the count of total packets received. PACKETS RUNT_PACKETS Displays the count of packets with too few characters. TOTAL_ Displays the count of all characters received. CHARACTERS TRANSMITTED_ Displays the count of total packets transmitted. PACKETS /ECHO_FAILURE Shows the number of Link Control Protocol (LCP) echo requests that must be sent without response before the line is considered down. /ECHO_INTERVAL Displays the interval in milliseconds (msecs) between transmitted LCP echo requests. /FCS_SIZE Shows the current receive and transmit FCS size in bits. /FLOW_CONTROL /FLOW_CONTROL=(keyword,...) Shows the current flow control setting used over the asynchronous physical link. You can specify one of the following keywords with this qualifier: Flow Control Description HARDWARE Uses RTS/CTS flow control. If using this control, the transmit Asynch Control Character Map (ACCM) can be 0x0, 0x0, 0x0, 0x60000000. Only valid for lines set to /MODEM or /COMMSYNCH. XON_XOFF Uses band flow control. If using this control, the (de- optimal transmit ACCM is 0xA0000, 0x0, 0x0, 0x60000000. fault) Only valid for asynchronous lines. /HANGUP Displays the action that occurs when a session is terminated. /MAGIC_NUMBER_RETRIES Shows the number of attempts that are made to negotiate a magic number. /MAXCONFIGURE Shows the number of configure-request packets sent without acknowledgment before assuming that the peer is not responding. /MAXFAILURE Displays the number of configure-nak packets sent before sending a configure-ack and before assuming that the configuration is not converging. /MAXTERMINATE Shows the number of terminate-request packets sent without acknowledgment before assuming the peer is unable to respond. /MRU Displays the largest packet that the line can receive. /MTU Displays the largest packet that the line can transmit. /NETWORK_PROTOCOL Displays the current network protocol(s) allowed over the physical link. /PASSIVE Indicates whether this is a passive or active line. /PERMANENT Indicates whether this is a permanent or transient (nopermanent) line. /PROTOCOL_COMPRESSION Shows the status of protocol field compression. /RECEIVE_ACCM Displays the value of the current receive ACCM for asynchronous ports. /RESTART_TIMER Displays the interval used to time transmission of request packets. /SPEED Indicates the current input and output speeds of the line. /TRANSMIT_ACCM Displays the value of the current transmit ACCM for asynchronous ports. 3 Examples 1.PPPD> SHOW/ALL=BRIEF TTA1: Line TTA1: is being used for PPP connections Debug trace: OFF Debug mailbox: Address comp: OFF Max configure: 10 Restart timer: 30 ASN port name: ASN13 Max failure: 5 Echo failure: 0 Max terminate: 2 Receive ACCM: FFFFFFFF Echo intervals: 0 MRU: 1500 Transmit ACCM: FFFFFFFF Flow control: XON/XOFF MTU: 1500 00000000 Hangup: DEFAULT Mode: ACTIVE 00000000 Line type: TRANSIENT Net protocol: TCP/IP 60000000 Magic retries: 0 Protocol comp: OFF 00000000 Input speed: DEFAULT Receive FCS: 16 00000000 Output speed: DEFAULT Transmit FCS: 16 Counter totals for line TTA1: Bad FCS packets: 0 Packets received: 4 Data lost (chars): 0 Packets transmitted: 6 Dropped chars: 0 Runt packets: 0 Framing errors: 0 Total chars received: 179 Long packets: 0 The command in this example displays the current PPP characteristics assigned to port TTA1.
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