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Dial Solutions Command Reference
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About the Cisco IOS Software Documentation
- Part 1: Dial-In Port Setup
- Part 2: Dial-In Terminal Service and Remote Node Configuration
- Part 3: Dial-On Demand Routing
- Part 4: Dial Backup
- Part 5: Dial-Out Modem Pooling
- Part 6: Large-Scale Dial Solutions
- Part 7: Cost-Control Solutions
- Part 8: Virtual Private Dialup Networks
- Part 9: Other Network Traffic on ISDN Channels
- Part 10: Dial-Related Addressing Services
- Part 11: Appendixes
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Table Of Contents
PAD and X.25 Connection Setup Commands
resume (setting X.3 PAD parameters)
PAD and X.25 Connection Setup Commands
This chapter describes the commands used for configuring an internal packet assembler/disassembler (PAD) application to make connections with remote devices using the X.25 protocol.
You can configure an internal PAD in the following ways:
•
Use the x28 EXEC command to access and use the X.28 standard interface. After the x28 command is issued, you enter X.28 mode and the router prompt changes to an asterisk (*). From this mode, you can set X.3 PAD parameters.
•
Note
pad
To log on to a PAD, use the pad user EXEC command.
pad {x121-address | hostname} [/cud text] [/debug] [/profile name] [/quiet message] [/reverse] [/use-map]
Syntax Description
Command Mode
User EXEC
Usage Guidelines
This command first appeared in Cisco IOS Release 11.2.
The pad command supports one-word connections. You do not have to enter the pad command; just entering the address is enough to start the connection. A PAD can also be accessed and X.3 parameters configured with the x28 EXEC command, which uses the standard X.28 user interface.
You can have several PAD connections open at the same time and switch between them. You also can exit a connection and return to the user EXEC prompt at any point. To open a new connection, first exit the current connection by entering the escape sequence (Ctrl-Shift-6 then x [Ctrl^x] by default) to return to the EXEC prompt, then open the new connection.
If the /use-map option is selected on the outgoing pad command, the x25 map pad command entries are searched for a matching X.121 destination address. If a match is found, the x25 map pad command entry options (such as CUD and idle) and facilities (such as packet in, packet out, win in, and win out) are applied to the outgoing PAD call.
To display information about packet transmission and X.3 PAD parameter settings, enter the show x25 pad command.
To exit a session, simply log off the remote system. Then, terminate the active session by entering the exit command.
Examples
Use the ? command to display pad command options, as shown in this example:
router# pad / ?/cud Call user data/debug Debugging option/profile Use a defined X.3 profile/quiet Suppress informational messages/reverse X25 Address reverse/use-map Use x25 map pad command facilities for outgoing Calls<cr>The following example starts a PAD session:
router> pad 123456789Trying 123456789...Openrouter>You can also access a PAD using standard X.28 commands. The following example enters X.28 mode with the x28 EXEC command and configures a PAD with the set X.3 parameter command. The set command sets the idle time delay to 40 seconds.
router# x28* set 4:40The following example uses the /use-map option to configure a larger window and packet size than the default specified on the interface, and it sets the VC idle time to 2 seconds. Notice that the map values are used rather than the interface default values.
Router-A(config-if)# x25 map pad 2194441 cud gmcmilla windowsize 7 7 packetsize 1024 1024 idle 2Router-A(config-if)# endRouter-A#%SYS-5-CONFIG_I: Configured from console by console.Router-A# pad 2194441 /cud gmcmillla /use-mapTrying 2194441....Open06:31:12: pad_open_connection: found a matching x25 map pad06:31:12: Serial1: X.25 O R1 Call (22) 8 lci 102406:31:12: From(7): 2191111 To(7): 219444106:31:12: Facilities: (6)06:31:12: Packet sizes: 1024 102406:31:12: Window sizes: 7 706:31:12: Call User Data (12): 0x01000000 (pad)06:31:12: Serial1: X.25 I R1 Call Confirm (5) 8 lci 102406:31:12: From(0): To(0):06:31:12: Facilities: (0)06:31:12: PAD0: Call completedRelated Commands
You can use the master indexes or search online to find documentation of related commands.
translate x25
resume (setting X.3 PAD parameters)
To set X.3 parameters, use the resume EXEC command as follows:
resume [connection] [/set parameter:value]
Syntax Description
Table 90 PAD Parameters
1
Escape from data transfer
Not supported.
2
Local echo mode
0
1
No local echo (incoming PAD connection default).
Local echo on (outgoing connection default).
3
Data forward character
0
1
2
4
8
16
32
64
None—full packet.
Forward packet on receipt of an alphanumeric character.
Forward packet on receipt of a RETURN (outgoing connection default).
Forward packet on receipt of ESCAPE, BEL, ENQ, or ACK.
Forward packet on receipt of DEL, CAN, or DC2.
Forward packet on receipt of ETX or EOT.
Forward packet on receipt of HT, LT, VT, or FF.
All other characters in the ASCII chart.
4
Idle timer
0
1-255
No timer.
Delay value in twentieths of a second (default for both connection types is 1).
5
Device control
Transmits flow control characters during data transfer to the terminal, which controls the terminal and data flow.
6
PAD service signals
Not supported.
7
Receipt of break
0
1
2
4
8
16
21
Ignore the Break signal.
Transmit an INTERRUPT packet to notify the remote host or another PAD that the Break signal was generated.
Transmit a RESET packet to reset the virtual circuit.
Transmit an X.29 break indication to the remote host, or to a PAD (outgoing connection default).
Escape from data transfer mode.
Discard output to the terminal by setting parameter 8 to a value of 1.
Combination of values 1, 4, and 16 (incoming connection default).
8
Discard output
0
1
Normal data delivery to the terminal (outgoing connection default).
Discard all output to the terminal; set by parameter 7.
9
Return padding
Determines if PAD can provide padding (insert filler characters) upon receipt of a Return character from the terminal.
10
Line folding
Not supported.
11
Baud rate
10
5
9
0
1
6
8
2
4
3
7
11
12
13
14
15
16
17
18
50 baud.
75 baud.
100 baud.
110 baud.
134.5 baud.
150 baud.
200 baud.
300 baud.
6001 baud.
1200 baud.
1800 baud.
75/12002 baud.
2400 baud.
4800 baud.
9600 baud.
19200 baud.
48000 baud.
56000 baud.
64000 baud.
12
Input flow control
Determines whether or not the terminal can transmit ASCII XON/XOFF (transmission on and off) characters to PAD during the data transfer mode.
13
Line feed insertion
0
1
2
4
Do not insert (outgoing connection default).
Insert after transmitting RETURN to the terminal.
Insert after echoing RETURN to the terminal.
Insert after echoing RETURN to the remote host.
14
Line feed padding
Determines if PAD can provide padding (insert filler characters) upon receipt of a LINE FEED character from the terminal.
15
Local editing
0
1
Disables editing capabilities.
Enables editing capabilities.
16
Character delete
0-127
Select one ASCII character. Default is ASCII 127 (Del).
17
Line delete
0-127
Select one ASCII character. Default is ASCII 21 (Ctrl-U).
18
Line display
0-127
Select one ASCII character. Default is ASCII 18 (Ctrl-R).
19
Editing PAD service signals
Not supported.
20
Echo mask
Not supported.
21
Parity treatment
Not supported.
22
Page wait
Not supported.
1 600 is the beginning of values that are PAD-type dependent.
2 75 is from PAD; 1200 is to PAD.
Default
For outgoing connections, the X.3 parameters default to the following:
2:1, 3:2, 4:1, 7:4, 16:127, 17:21, 18:19All other parameters default to zero, but can be changed using the /set switch option with either the resume command or the x3 command.
For incoming PAD connections, the software sends an X.29 SET PARAMETER packet to set only the following parameters:
2:0, 4:1, 7:21, 15:0Command Mode
EXEC
Usage Guidelines
This command first appeared in a release prior to Cisco IOS Release 10.0.
The resume [connection] command first appeared in Cisco IOS Release 9.1.
The /set switch sets the X.3 parameters defined by parameter number and value, separated by a colon. You set one or more X.3 PAD parameters, as follows:
Step 1
Step 2
Step 3
Example
The following example specifies that local echo mode be turned on for a connection to the device Swift (which is session number 3). As shown in , "local echo on" uses the parameter 2 and the value 1 (represented as 2:1 in this example):
Swift% ^^Xrouter> resume 3 /set 2:1Swift%service pad
To enable all packet assembler/disassembler (PAD) commands and connections between PAD devices and access servers, use the service pad global configuration command. Use the no form of this command to not accept incoming and outgoing PAD connections.
service pad [cmns] [from-xot | to-xot]
no service pad [cmns] [from-xot | to-xot]Syntax Description
cmns
(Optional) Specifies sending and receiving PAD calls over CMNS.
from-xot
(Optional) Accept XOT to PAD connections.
to-xot
(Optional) Allow outgoing PAD calls over XOT.
Default
All PAD commands and associated connections are enabled. PAD services over XOT or CMNS are not enabled.
Command Mode
Global configuration
Usage Guidelines
The service pad command first appeared in Cisco IOS Release 10.0. The options cmns, from-xot, and to-xot first appeared in Cisco IOS Release 11.3.
The options from-xot and to-xot enable PAD calls to destinations that are not reachable over physical X.25 interfaces, but instead over TCP tunnels. This feature is known as PAD over XOT (X.25 over TCP).
Examples
If the service pad command is disabled, the EXEC pad command and all PAD-related configurations, such as X.29, are unrecognized, as shown in the following example:
router(config)# no service padrouter(config)# x29 ?% Unrecognized commandrouter(config)# exitrouter# pad ?% Unrecognized commandIf the service pad command is enabled, the EXEC pad command and access to an X.29 configuration is granted, as shown in the following example:
router# config terminalEnter configuration commands, one per line. End with CNTL/Z.router(config)# service padrouter(config)# x29 ?access-list Define an X.29 access listinviteclear-time Wait for response to X.29 Invite Clear messageprofile Create an X.3 profilerouter# pad ?WORD X121 address or name of a remote systemRelated Commands
You can use the master indexes or search online to find documentation of related commands.
x29 access-list
x29 profileshow x25 pad
To display information about current open connections, including packet transmissions, X.3 parameter settings, and the current status of virtual circuits, use the show x25 pad user EXEC command.
show x25 pad
Syntax Description
This command has no arguments or keywords.
Command Mode
User EXEC
Usage Guidelines
This command first appeared in Cisco IOS Release 11.2.
Sample Display
The following is sample output from the show x25 pad command:
router# show x25 padtty2, Incoming PAD connectionTotal input: 61, control 6, bytes 129. Queued: 0 of 7 (0 bytes).Total output: 65, control 6, bytes 696.Flags: 1, State: 3, Last error: 1ParamsIn: 1:1, 2:0, 3:2, 4:1, 5:1, 6:0, 7:21,8:0, 9:0, 10:0, 11:14, 12:0, 13:0, 14:0, 15:1,16:127, 17:21, 18:18, 19:0, 20:0, 21:0, 22:0,ParamsOut: 1:1, 2:1, 3:2, 4:1, 5:0, 6:0, 7:4,8:0, 9:0, 10:0, 11:14, 12:0, 13:0, 14:0, 15:0,16:127, 17:21, 18:18, 19:0, 20:0, 21:0, 22:0,LCI: 1, State: D1, Interface: Serial0Started 0:11:10, last input 0:00:16, output 0:00:16Connected to 313700540651Window size input: 7, output: 7Packet size input: 512, output: 512PS: 1 PR: 5 ACK: 5 Remote PR: 1 RCNT: 0 RNR: FALSERetransmits: 0 Timer (secs): 0 Reassembly (bytes): 0Held Fragments/Packets: 0/0Bytes 696/129 Packets 65/61 Resets 0/0 RNRs 0/0 REJs 0/0 INTs 0/0Table 91 describes significant fields shown in the output in the display.
where
To list the open sessions, use the where EXEC command.
where
Syntax Description
This command has no arguments or keywords.
Command Mode
EXEC
Usage Guidelines
This command first appeared in a release prior to Cisco IOS Release 10.0.
The where command displays all open sessions associated with the current terminal line.
The Ctrl^x, where, and resume commands are available with all supported connection protocols.
Example
The following is sample output from the where command:
router# whereConn Host Address Byte Idle Conn Name1 MATHOM 192.31.7.21 0 0 MATHOM* 2 CHAFF 131.108.12.19 0 0 CHAFFThe asterisk (*) indicates the current terminal session.
describes significant fields shown in the display.
Related Commands
You can use the master indexes or search online to find documentation of related commands.
resume
show sessionsx3
To set X.3 PAD parameters, use the x3 EXEC command.
x3 parameter:value
Syntax Description
parameter:value
Sets the PAD parameters. (See Table 90.)
Default Values
For outgoing connections, the X.3 parameters default to the following:
2:1, 3:2, 4:1, 7:4, 16:127, 17:21, 18:19All other parameters default to zero, but can be changed using the /set switch keyword with either the resume command or the x3 command.
For incoming PAD connections, the software sends an X.29 SET PARAMETER packet to set only the following parameters:
2:0, 4:1, 7:21, 15:0For a complete description of the X.3 PAD parameters, refer to the appendix "X.3 PAD Parameters."
Command Mode
EXEC
Usage Guidelines
This command first appeared in Cisco IOS Release 11.2.
You can have several PAD connections open at the same time and switch between them. You can also exit a connection and return to the user EXEC prompt at any point.
To open a new connection, first suspend the current connection by pressing the escape sequence (Ctrl-Shift-6 then x [Ctrl^x] by default) to return to the system command prompt, then open the new connection with the pad command.
You can have several concurrent sessions open and switch back and forth between them. The number of PAD sessions that can be open is defined by the session-limit command.
To switch between sessions you must escape one session and resume a previously opened session. Use the Ctrl^x, where, and resume commands, which are available with all supported connection protocols, to do this.
You can issue any of the following commands to terminate a terminal session:
exit
quit
logoutTo display information about packet transmission and X.3 PAD parameter settings, use the show x25 pad command.
Example
The following example shows how to change a local X.3 PAD parameter from a remote X.25 host using X.29 messages, which is a secure way to enable a remote host to gain control of local PAD. The local device is Router-A. The remote host is Router-B. The parameters listed in the ParamsIn field are incoming parameters, which are sent by the remote PAD. The parameters listed in the ParamsOut field are parameters sent by the local PAD.
Router-A# pad 123456Trying 123456...OpenRouter-B> x3 2:0Router-B>Router-A# show x25 padtty0, connection 1 to host 123456Total input: 12, control 3, bytes 35. Queued: 0 of 7 (0 bytes).Total output: 10, control 3, bytes 64.Flags: 1, State: 3, Last error: 1ParamsIn: 1:0, 2:0, 3:0, 4:0, 5:0, 6:0, 7:0,8:0, 9:0, 10:0, 11:0, 12:0, 13:0, 14:0, 15:0,16:0, 17:0, 18:0, 19:0, 20:0, 21:0, 22:0,ParamsOut: 1:1, 2:0, 3:2, 4:1, 5:1, 6:0, 7:21,8:0, 9:1, 10:0, 11:14, 12:1, 13:0, 14:0, 15:0,16:127, 17:21, 18:18, 19:0, 20:0, 21:0, 22:0,Router-A#Related Commands
You can use the master indexes or search online to find documentation of related commands.
resume
x25 subaddress
To append either a physical port number or a value specified for a line as a subaddress to the X.121 calling address, use the x25 subaddress line configuration command. Use the no form of this command to disable subaddressing.
x25 subaddress {line | number}
no x25 subaddress {line | number}Syntax Description
line
The physical port number for the indicated line will be appended to the X.121 address as the subaddress.
number
Numeric variable assigned to a specific line.
Command Mode
Line configuration
Usage Guidelines
This command first appeared in Cisco IOS Release 11.2F.
Use the x25 subaddress line command to create a unique X.121 calling address by adding either a physical port number or a numeric value for a line as a subaddress to the X.121 calling address.
Examples
The following example shows how to configure subaddressing on vty lines 10 through 20 by appending the line number as a subaddress to the X.121 calling address:
line vty 10 20 x25 subaddress lineThe following example shows how to configure subaddressing on the first five tty lines by appending the value "09" as a subaddress to the X.121 calling address of an X.28 connection originating on these lines:
line 1 5 x25 subaddress 9 autocommand x28Related Command
You can use the master indexes or search online to find documentation of related commands.
line
x28
To enter X.28 mode and access an X.25 network or set X.3 PAD parameters, use the x28 EXEC command.
x28 [escape character-string] [noescape] [nuicud] [profile file-name] [reverse] [verbose]
no x28 [escape character-string] [noescape] [nuicud] [profile file-name] [reverse] [verbose]Syntax Description
Default
Disabled. X.28 mode uses standard X.28 command syntax.
Command Mode
EXEC
Usage Guidelines
This command first appeared in Cisco IOS Release 11.2 F.
If both the escape and noescape options are not set, the default escape sequence is used (exit command).
X.28 mode is identified with an asterisk (*) router prompt. After you enter this mode, the standard X.28 user interface (with the exception of the escape sequence) is available. From this interface, you can configure a PAD device using X.3 parameters, or you can access an X.25 network.
In X.28 mode, you can set PAD command signals using standard or extended command syntax. For example, you can enter the clr command or clear command to clear a virtual call. A command specified with standard command syntax is merely an abbreviated version of the extended syntax version.
lists the commands available in both standard and extended command syntax.
Table 93 Available PAD Command Signals
Syntax
Syntaxbreak
Simulate an asynchronous break.
call
Place a virtual call to a remote device.
clr
clear
Clear a virtual call.
command-signal1
Specifies a call request without using a standard X.28 command, which is entered with the following syntax: facilities-x121-addressDcall-user-data
help
iclr
iclear
Request the remote device to clear the call.
int
interrupt
Send an Interrupt Packet.
par?
parparameter
readprof
profile file-name
Load a standard or a named profile.
reset
Reset the call.
rpar?
rread
Show the current values of remote parameters.
rset?
rsetread
Set and then read the values of remote parameters.
set
set?
setread
Change and then read values of parameters.
stat
status
Request the status of a connection.
selection pad
Set up a virtual call.
1 Here is an example of issuing a call request command: the R,G23,P2-234234Duser1 command.
lists the different types of parameters you can set using the set parameter-number: new-value PAD command signal from X.28 mode.
Table 94 Supported X.3 PAD Parameters
Number
Name1
Escape from data transfer
PAD recall using a character. Minimum value: 0;
maximum value: 126; default: 1.2
Local echo mode
Minimum value: 0; maximum value: 1; default: 1.
3
Data forward character
Selection of data forwarding characters. Minimum value: 0;
maximum value: 255; default: 126.4
Idle timer
Selection of idle timer delay. Minimum value: 0; maximum value: 255; default: 0.
5
Device control
Ancillary device control. Minimum value: 0; maximum value: 2; default: 1.
6
PAD service signals
Control of PAD service signals. Minimum value: 0; maximum value: 255; default: 2.
7
Action upon receipt of a BREAK signal
Operation on receipt of bread signal. Minimum value: 0;
maximum value: 31; default: 2.8
Discard option
Minimum value: 0; maximum value: 1; default: 0.
9
Return Padding
Bytes to add after the carriage return. Minimum value: 0;
maximum value: 255; default:2.101
Line folding
Not supported.
11
Baud rate
Binary speed of start-stop mode DTE. Minimum value: 0;
maximum value: 18; default: 14.12
Input flow control
Flow control of the PAD. Minimum value: 0; maximum value: 1; default: 1.
13
LINE FEED insertion
Linefeed insertion after carriage return. Minimum value: 0;
maximum value: 7; default: 0.14
LINE FEED Padding
Minimum value: 0; maximum value: 255; default: 0.
15
Local editing
Minimum value: 0; maximum value: 1; default: 0.
16
Character delete
Minimum value: 0; maximum value: 127;
default: 127.17
Line delete
Minimum value: 0; maximum value: 127; default: 24.
18
Line display
Minimum value: 0; maximum value: 127; default: 18.
19
Editing PAD service signals
Minimum value: 0; maximum value: 126; default: 2.
20
Echo mask
Minimum value: 0; maximum value: 255; default: 0.
211
Parity treatment
Not supported.
221
Page wait
Not supported.
1 These parameters are not supported in Cisco IOS Release 11.2 or 11.3.
Note
lists the options for the X.28 help command.
You can issue call requests from X.28 mode without using standard X.28 commands. To do this, use the following command syntax:
facilities-x121-addressDcall-user-data
The following rules apply to all call requests parsed in X.28 mode:
•
•
•
•
•
•
shows examples of parsed call requests.
Table 96 Example X.28 Call Requests
Examples
The following example places a virtual call using the call PAD command signal in X.28 mode:
router# x28* call 123456The following example enters X.28 mode with the x28 EXEC command and configures a PAD with the set X.3 parameter command. The set command sets the idle time delay to 40 seconds.
router# x28* set 4:40Related Commands
You can use the master indexes or search online to find documentation of related commands.
pad
