line console command (2024)

FAQs

What does line vty 0.4 mean? ›

It defines how many VTY's that are active on the device and essentially how many simultaneous remote connections you want to allow/support. In case of "line vty 0 4", you can have five simultaneous connections. If you want more, you can do it by adding additional VTY's: "line vty 0 15", which will give you 16 in total.

The command line is relatively easy to learn, so it should take only a few weeks to get familiar with it. Of course, there are more advanced topics that will take longer to master, but understanding the syntax and how it works should only take a few weeks.

console 0 is the physical console port on the switch/router you plug into. line vty is when you remote into the switch/router via telnet or ssh. the config-line is letting you know you are currently in configuration mode for that specific line.

User EXEC level allows you to access only basic monitoring commands; privileged EXEC level allows you to access all router commands. Privileged EXEC level can be password protected to allow only authorized users the ability to configure or manage the router.

Lines 0 15 is vty lines 0, 1, 2 ,3 ,4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14 and 15. for example if you were type in global configuration mode, line vty 0 15 you will enter configuration for lines 0-15.

15 In the given configuration, the "line vty 0 4" and "line vty 5 15" commands are used to configure the virtual terminal lines (VTY) for remote access. The "login" command is enabled under both VTY lines, which means that authentication is required for VTY access.

While there's no need for you to reenact the scene above, working with the command line is a critical skill for you to learn as a developer. The command line is like our base of operations, from which we can launch other programs and interact with them.

The maximum length of the string that you can use at the command prompt is 8191 characters. This limitation applies to: the command line. individual environment variables that are inherited by other processes, such as the PATH variable.

If I'm interpreting “command lining” as writing commands on a shell's command-line, yes, technically writing a sequence of commands on the command line is a form of coding. However, there are many other forms of coding, so coding is not necessarily “command lining”.

If StopBits is 1 , one stop bit is used to indicate the end of data transmission. If StopBits is 2 , two stop bits are used to indicate the end of data transmission. If StopBits is 1.5 , the stop bit is transferred for 150% of the normal time used to transfer one bit.

What does tty mean in Cisco? ›

TTYs are asynchronous connections between the router's async interfaces and serial devices (modems). If you are connecting modems to your router or access server for dial-up or dial-out connections, you will need to configure the TTY ports. The TTY ports correspond directly to async interfaces.

line aux 0. The auxiliary port is used for out-of-band configuration of your router/switch, which is typically accomplished via a modem. The auxiliary port supports hardware flow control and the console port does not.

enable password is a command that allows setting a local password to control access to various privilege levels in global configuration mode. On the other hand, enable secret is a command that provides an additional layer of security over the enable password command in global configuration mode.

The ROM Monitor (ROMMON) is a bootstrap program that initializes the hardware and boots the Cisco IOS XE software when you power on or reload a router. If your router does not find a valid system image to load when it is booting, the system enters the ROMMON mode.

Virtual teletype (VTY) is a command line interface that gives users access to a device's control plane, most often in network devices like routers and switches. By using it, administrators can configure, manage, and monitor the device remotely. VTY lines are logical interfaces of a device.

The value range is 0 to 7 for AUX lines and 0 to 63 for VTY lines. last-number2: Specifies the relative number of the last user line. The value range is 1 to 7 for AUX lines and 1 to 63 for VTY lines.

Output queue: 0/40 (size/max): The size of the output queue which shows current packets and the maximum it can handle. minute input rate 0 bits/sec, 0 packets/sec: The average rate at which we receive packets. minute output rate 0 bits/sec, 0 packets/sec: The average rate at which we transmit packets.

By default all routers have 5 vty lines (factory defaults). Unless you configure the remaining available lines, there is no need for them to be protected.