ccna trunk

ccna trunk.The IOS device's line provides access to the EXECshell, which is sometimes referred to as character mode access because it uses the CLI.Table 10.4 lists the supported line types. In configuration mode. use the command line to specify a line. you must specify the type and number of the line to be configured. where the line number starts at 0. Note that console lines and auxiliary lines have only one line number: 0. When configuring VTY and TTY, you can specify a range of line numbers. Executing the command line will enter sub-configuration mode, where the command entered affects only a specific line (for VTY and TTY, it may be multiple lines)Table 10.4 IOS Line Type Line Type Description Command ExamplesConsole line Physical port that provides initial CLI access, used for troubleshooting when remote access to the device is not possible, only one linecon 0 per deviceAuxiliary line Alternate physical port, typically used for dial-up connections to IOS devices, not all devices have an auxiliary port, up to one per device lineaux0Virtual Type Terminal (VTY) Logical port that supports remote access to the CLI using Telnet and SSH, 1OS devices support many VTYs, depending on the device model and software version linevty 0 4Teleport Terminal (TTY) A physical port used to connect to a modem to provide terminal services or access to a console port on other devices. Only routers have such ports, depending on the router model and the asynchronous card installed linetty 0 311. Modify the idle timeoutBy default, the IOS device automatically exits after 10 minutes of idleness. To modify this time, use the line subconfiguration mode command exec-timeoutoIOS(config)# line line_type line_#IOS(config-line)# exec-timeout minutes secondsDon't forget that this only modifies the configuration of the specified line, other lines will still use the default idle timeout. If you want a specific line to never time out, set both the number of minutes and seconds to 0, as shown below.