show line [line-number | aux number | console number | tty number | vty number]
aux Auxiliary line console Primary terminal line tty Terminal controller vty Virtual terminal line-number The line number to be shown
To display the parameters of a terminal line, use the show line EXEC command.
The following sample output from the show line command shows that line 17 is a virtual terminal line with a transmit and receive rate of 9600 bps. Also shown is the modem state, terminal screen width and length, and so on.
Router#show line 17 Tty Typ Tx/Rx A Modem Roty AccO AccI Uses Noise Overruns A 17 VTY 9600/9600 - - - - - 1 0 0/0 Line 17, Location: "", Type: "" Length: 24 lines, Width: 80 columns Baud rate (TX/RX) is 9600/9600 Status: Ready, Connected, Active, No Exit Banner, Async interface active Capabilities: Line usable as async interface Modem state: Ready Special Chars: Escape Hold Stop Start Disconnect Activation ^^x none - - none Timeouts: Idle EXEC Idle Session Modem Answer Session Dispatch never never none not set Session limit is not set. Time since activation: never Editing is enabled. History is enabled, history size is 10. Full user help is disabled Allowed transports are lat telnet rlogin mop. Preferred is lat. No output characters are padded No special data dispatching characters Line is running SLIP routing for address 126.96.36.199. 0 output packets queued, 0 input packets. Group codes: 0
The table describes the fields in the show line output.
Table: Show Line Field Descriptions
Line number. In this case, 17.
Type of line. In this case, a virtual terminal line (VTY), which is active, in asynchronous mode denoted by the preceding `A.' Other possible values are:
- AUX---auxiliary port
- TTY---asynchronous terminal port
- lpt---parallel printer
Transmit rate/receive rate of the line.
Indicates whether autobaud has been configured for the line. A value of F indicates that autobaud has been configured; a hyphen indicates that it has not been configured.
Types of modem signals that have been configured for the line. Possible values include
Rotary group configured for the line.
Output or Input access list number configured for the line.
Number of connections established to or from the line since the system was restarted.
Number of times noise has been detected on the line since the system restarted.
Hardware (UART) overruns and/or software buffer overflows, both defined as the number of overruns or overflows that have occurred on the specified line since the system was restarted. Hardware overruns are buffer overruns; the UART chip has received bits from the software faster than it can process them. A software overflow occurs when the software has received bits from the hardware faster than it can process them.
Location of the current line.
Type of line, as specified by the line global configuration command.
Length of the terminal or screen display.
Width of the terminal or screen display.
Baud rate (TX/RX)
Transmit rate/receive rate of the line.
State of the line: Ready or not, connected or disconnected, active or inactive, exit banner or no exit banner, async interface active or inactive.
Current terminal capabilities. In this case, the line is usable as an asynchronous interface.
Modem control state. This field should always read READY.
Current settings of special characters that were input by the user (or taken by default) from the following global configuration commands:
Current settings that were input by the user (or taken by default) from the following global configuration commands:
- modem answer-timeout
Maximum number of sessions.
Time since activation
Last time start_process was run.
Whether or not command line editing is enabled.
Current history length, set by the user (or taken by default) from the history configuration command.
Full user help
Whether or not full user help has been set by the user with the terminal full-help command or by the administrator with the full-help line configuration command.
Allowed transports are...
Current set transport method, set by the user (or taken by default) from the transport preferred line configuration command.
characters are padded
Current set padding, set by the user (or taken by default) from the padding line configuration command.
data dispatching characters
Current dispatch character set by the user (or taken by default) from the dispatch-character line configuration command.
Definition of the specified line's protocol and address.
output, input packets
Number of output and input packets queued on this line.
AT group codes.
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