The use of "line console 0" command is to connect a switch/router through medium console. If there is only one console port, you can only choose "line console 0".
What is the difference between console 0 and CONFIG-line?
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. Some commands are also different in relation to them.
What does line Con 0 mean on a switch?
you are on the right track. Line con 0 refers to the console port of the switch (it is usually either an RJ-45 or, on newer devices, a USB port). The console port is used to physically connect (a PC or laptop) to the device. There are a few things you can configure on the console port (0 indeed means the first):
How many line VTY 0 4 configurations are supported on Cisco router?
Cisco hardware supports a maximum of 16 line virtual interfaces, i.e. (0,1,2,3,…,15). In this session, we will configure the line vty 0 4 configurations on Cisco Router. You must have proper privileges to access the device in configuration mode to configure the line vty configuration.
What is the console relative line number for the console port?
line con 0 The console relative line number must be 0. Virtual terminal lines are used to allow remote access to the router. A virtual terminal line is not associated with either the auxiliary or console port.
What is the meaning of line Vty 0 15?
Line 0 4 is vty lines 0, 1, 2, 3 , and 4. 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. I hope this answers your question.
What is line number in Cisco?
line-number. The relative number of the terminal line (or the first line in a contiguous group) that you want to configure when the line type is specified. Numbering begins with zero. ending-line-number. (Optional) The relative number of the last line in a contiguous group that you want to configure.
What is the use of terminal length 0?
Type "terminal length 0" in privileged mode to set your terminal to display without any breaks. 2. Type "show run" or "show start" to show the applicable config. The config will display without any breaks or pauses.
What is the difference in line vty 0 4 and 5 15?
VTY lines are usually used for creating out-of-band management sessions to devices. If a password is not supplied on a vty line, that line cannot be used for managing the device. In some cases administrators may decide to let junior staff to use lines 0 - 4 and senior staff to use lines 5 - 15.
What does line console 0 mean?
The use of "line console 0" command is to connect a switch/router through medium console. If there is only one console port, you can only choose "line console 0". However if you have more than the number goes as 1,2,3,4 ... You can set different or same password to all your console ports.
What is the use of line Vty 0 4?
It is used to grant access to the vty lines by using a password. i,e, it forces the people connecitng to this device to provide password.
What is terminal length?
Simply put, Terminal length is the longest any hair on your head can grow. It's the length your hair would be if you never cut it, if it never broke.
How do I find the IP of a Cisco switch?
Type "show running-config" or "show config" and press the "Enter" key. The IP address or addresses assigned to interfaces on the switch are displayed in the command line interface output.
What is show run command?
The show running-config command displays the current running configuration on the FWSM. You can use the running-config keyword only in the show running-config command. You cannot use this keyword with no or clear, or as a standalone command, because the CLI treats it as a nonsupported command.
What does the command line Vty 0 1 mean?
What is the router prompt for the interface configuration mode? router (config-if)# What does the command line vty 0 1 mean? The "0 1" represents the number of vty lines to which the following configu- ration parameters will be applied. The two virtual terminal connections are identified as 0, 1.
How many Vty lines are there?
16 VTY linesThe virtual terminal or “VTY” lines are virtual lines that allow connecting to the device using telnet or Secure Shell (SSH). Cisco devices can have up to 16 VTY lines.
Why should you configure the Vty lines for the switch?
g. Configure the virtual terminal (vty) lines for the switch to allow Telnet access. If you do not configure a vty password, you will not be able to Telnet to the switch.
What is line command in Cisco router?
The line command can configure: The router's console port (CTY) The router's asynchronous ports (TTYs), used for dial-in and dial-out modem connections. The router's auxiliary port (AUX), used for backup modem connections. Telnet, SSH, and rlogin connections to the router (“virtual terminals” or VTYs)
What is line Vty in Cisco?
The virtual terminal or “VTY” lines are virtual lines that allow connecting to the device using telnet or Secure Shell (SSH). Cisco devices can have up to 16 VTY lines. You can determine how many VTY lines you have by issuing “line vty 0 ?” from global configuration mode.
What does the command line Vty 0 1 mean?
What is the router prompt for the interface configuration mode? router (config-if)# What does the command line vty 0 1 mean? The "0 1" represents the number of vty lines to which the following configu- ration parameters will be applied. The two virtual terminal connections are identified as 0, 1.
What is line configuration mode used for?
The Line Configuration Mode is used to manage the terminal line characteristics for output formatting. The commands or keywords/variables that are available are dependent on platform type, product version, and installed license(s). Exits the current configuration mode and returns to the Exec mode.
What is CIM Cisco?from cisco.com
With CIM Cisco Internetworking Basics, you can gain a practical understanding of the fundamental technologies, principles, and protocols used in routing. From an introduction to internetworking and the protocols used in routing, local area network switching and wide area network access, you'll learn the Cisco IOS® Software commands related to various fundamental areas of networking. You'll gain hands on experience by engaging in exercises teaching you the Cisco IOS® command-line interface (CLI), which is used to configure and manage Cisco routers.
What does aaa login authentication cisco tacacs+ local do?from community.cisco.com
1. right, "aaa login authentication cisco tacacs+ local" under console would try to connect with specified tacacs server for user authentication accessing console . If tacacs communication fails it will try local usernames.
Is Cisco hosting the IT Blog Awards 2021?from community.cisco.com
The 2021 IT Blog Awards, hosted by Cisco, is now open for submissions. Submit your blog, vlog or podcast today. For more information, including category details, the process, past winners and FAQs, check out: https://www.cisco.com/c/en/us/t... view more
Does Cisco have a password?from community.cisco.com
The commision password cisco no longer exists in the global config but it is on the line console 0. There is no cisco name-list on the tacacs+ server or within global on the switch
What does line console mean?from community.cisco.com
line console o mean connect one laptop to another router/switch with secure platforms medium.
What line console is used to log in to VTY?from community.cisco.com
Better to go under Line console 0 and Line VTY and enter the "login local" config after creating local user accounts on the device.
How to debug a standby switch?from cisco.com
To debug the standby switch, use the session standby ios privileged EXEC command from the active switch to access the IOS console of the standby switch. To debug a specific stack member, use the session switch stack-member-number privileged EXEC command from the active switch to access the diagnostic shell of the stack member. For more information about these commands, see the switch command reference.
What does aaa login authentication cisco tacacs+ local do?from community.cisco.com
1. right, "aaa login authentication cisco tacacs+ local" under console would try to connect with specified tacacs server for user authentication accessing console . If tacacs communication fails it will try local usernames.
What does VTY mean in Cisco?from gns3network.com
VTY stands for Virtual Teletype. I’m sure you already know the virtual interfaces, so the “vty” is a kind of virtual interface that is used to get CLI access of a Cisco Router or Switch over Telnet/SSH. All the connections are remotely over the network, so there is no hardware associated with it.
How many virtual interfaces can you open with vty 0 4?from gns3network.com
The command, line vty 0 4, will open 5 virtual interfaces, i.e. (0,1,2,3,4) for remote access. That means, 5 different administrators/connections can access the Cisco Router/Switch simultaneously using Telnet or SSH. Cisco hardware supports a maximum of 16 line virtual interfaces, i.e. (0,1,2,3,…,15).
How to access CLI on switch?from cisco.com
Accessing the CLI on a Switch Stack. You can access the CLI through a console connection, through Telnet, a SSH, or by using the browser. You manage the switch stack and the stack member interfaces through the active switch. You cannot manage stack members on an individual switch basis.
What is live vty?
vty stands for Virtual Teletype and used to configure a virtual port to get the telnet or ssh access of Cisco Router/Switch. Cisco hardware support up to the 16 virtual port, i.e. (0,1,2,….15), on which administrators can telnet/ssh to gain remote access simultaneously. The command, line vty 0 4, will open 5 virtual ports, i.e. (0,1,2,..,5), that means only 5 administrators can log in to the device simultaneously.
How many virtual interfaces can you open with vty 0 4?
The command, line vty 0 4, will open 5 virtual interfaces, i.e. (0,1,2,3,4) for remote access. That means, 5 different administrators/connections can access the Cisco Router/Switch simultaneously using Telnet or SSH. Cisco hardware supports a maximum of 16 line virtual interfaces, i.e. (0,1,2,3,…,15).
What does VTY mean in Cisco?
VTY stands for Virtual Teletype. I’m sure you already know the virtual interfaces, so the “vty” is a kind of virtual interface that is used to get CLI access of a Cisco Router or Switch over Telnet/SSH. All the connections are remotely over the network, so there is no hardware associated with it.
Can you change configuration back to no AAA?
Changing configuration back to no aaa new-model is not supported.
Do you need a password to get priviladed mode?
Note: You need to set enable password to get priviladed mode access!
What is CLI in Cisco?
The Cisco IOS command-line interface (CLI) is the primary user interface used for configuring, monitoring, and maintaining Cisco devices. This user interface allows you to directly and simply execute Cisco IOS commands, whether using a router console or terminal, or using remote access methods.
What is the no form in configuration?
Using the no and default Forms of Commands. Almost every configuration command has a no form. In general, use the no form to disable a feature or function . Use the command without the no keyword to reenable a disabled feature or to enable a feature that is disabled by default.
What is global configuration mode?
Configuration modes, including global configuration mode, allow you to make changes to the running configuration. If you later save the configuration, these commands are stored across router reboots.
What is wildcard mask?
In this output, A.B.C.D indicates that use of a wildcard mask is allowed. The wildcard mask is a method for matching IP addresses or ranges of IP addresses. For example, a wildcard mask of 0.0.0.255 matches any number in the range from 0 to 255 that appears in the fourth octet of an IP address.
Can you use a keystroke as a command alias?
You can configure the system to recognize a particular keystroke (key combination or sequence) as command aliases. In other words, you can set a keystroke as a shortcut for executing a command. To enable the system to interpret a keystroke as a command, use the either of the following key combinations before entering the command sequence:
Does CLI recognize commands?
The CLI will recognize a command once you have entered enough characters to make the command unique. For example, if you enter conf in privileged EXEC mode, the CLI will be able to associate your entry with the configure command, because only the configure command begins with conf .
What is line console password?
Line Console password prevent un-authorized user access from entering into user exe mode. This password is the first step for securing a router, a good network administrator should and must add extra layers of security to the routers by setting enable password, line vty (Telnet password), Auxiliray line password and Cisco enable secret password.
What is upaaerouter1 (config)# line console 0?
UpaaeRouter1 (config)# line console 0 This command will get you to console line configuration mode
Why should the console port be disabled?
If the router is not in a secured location than the console port should be disabled for preventing the loss of router configuration. Line Console password prevent un-authorized user access from entering into user exe mode.
Where is the console password stored?
Line console password is stored in plain text and anyone who can read configurations can view the console password. If you want a more secure password which can not be seen by everyone then use enable secret password. Cisco enable secret password is a more secure form of console password and the enable secret password is stored in encrypted form in router configuration. Learn how to set enable secret password on Cisco router .
Where is the console port on a router?
Console port is located on the back of the router and is used for direct connection to the router from a PC. Prior to installing a new router in a network console port is the only option through which a router is configured and get to the working state in a network.
Can you change the configuration of a Cisco router?
Cisco Routers have a number of different ports through which these routers can be accessed. By default any one can access the router and can change configuration. In order to limit access and preventing users from changing configurations Cisco allows us to password protect each port.
What does console mean?from etherealmind.com
Console as meaning serial connection when you connect the console cable to the device, and the serial port to your laptop / computer.
What does show running configuration mean?from cisco.com
show running-config - displays the current configuration of the router.
How to test telnet connection?from cisco.com
This can be done by connecting from a different host on the network, but you can also test from the router itself by telnetting to the IP address of any interface on the router that is in an up/up state as seen in the output of the show interfaces command.
How many VTY sessions does an IOS router have?from etherealmind.com
Typically, an IOS router has five VTY sessions by default although you can configure more. This means five concurrent telnet / SSH session. If you configure more, you can (depending on IOS version) have more. For example, IOS SX code (switches) has fifteen by default. line vty 0 4.
What is the most common security that needs configuring, but protecting the router from unauthorized local access cannot be overlooked?from cisco.com
Protecting the router from unauthorized remote access, typically Telnet, is the most common security that needs configuring, but protecting the router from unauthorized local access cannot be overlooked.
What does TTY mean in Linux?from stackoverflow.com
TTY Definition: Teletypewriter originally and now also means any terminal on Linux/Unix systems. It also means any serial port on Unix/Linux systems.
What is a TTY line?from cisco.com
The TTY lines are asynchronous lines used for inbound or outbound modem and terminal connections and can be seen in a router or access server configuration as line x. The specific line numbers are a function of the hardware built into or installed on the router or access server.
What does VTY mean in Cisco?from gns3network.com
VTY stands for Virtual Teletype. I’m sure you already know the virtual interfaces, so the “vty” is a kind of virtual interface that is used to get CLI access of a Cisco Router or Switch over Telnet/SSH. All the connections are remotely over the network, so there is no hardware associated with it.
How many virtual interfaces can you open with vty 0 4?from gns3network.com
The command, line vty 0 4, will open 5 virtual interfaces, i.e. (0,1,2,3,4) for remote access. That means, 5 different administrators/connections can access the Cisco Router/Switch simultaneously using Telnet or SSH. Cisco hardware supports a maximum of 16 line virtual interfaces, i.e. (0,1,2,3,…,15).
How many ports does Cisco 2509 have?
For those looking to set up a reasonably priced lab environment the older Cisco 2509 (8 ports) and 2511 (16 ports) should be considered. While these are certainly a bit dated they still work fine in many environments (including mine) and operate on little power and in flexible environmental conditions.
What is console server?
A console server is a device which, via serial ports, has access to the physical console port of several different devices commonly located in the same rack.
Can a console router be used in a lab?
For small lab environments it is common for console routers to only be accessed via a single Ethernet connection. This is fine for lab environments, but if the console server is being used as part of a larger Out-Of-Band management plan for a production network, this single point-of-failure is unacceptable. In these situations, multiple points of access to the console router are often required to meet redundancy requirements.
Who is Sean Wilkins?
Sean Wilkins is an accomplished networking consultant who has been in the IT field for more than 20 years, working with several large enterprises. He is a writer for infoDispersion and his educational accomplishments include: a Master’s of Science in Information Technology with a focus in Network Architecture and Design, and a Master’s of Science in Organizational Management. Sean holds certifications with Cisco (CCNP/CCDP), Microsoft (MCSE) and CompTIA (A+ and Network+).
Can IP address be used locally?
Note: The IP address used can be used only locally or it can be integrated into a wider IP addressing plan
Can an EXEC process capture the line for incoming connections?
Note: This ensures that an EXEC process can't capture the line for incoming connections
Understanding Line Vty 0 4 Configurations in Cisco Router/Switch
Line Vty 0 4 Configurations on Cisco Router / Switch
- In this session, we will configure the line vty 0 4 configurations on Cisco Router. You must have proper privileges to access the device in configuration mode to configure the line vty configuration. Below configuration is the simple example of line vty configuration: At this point, I would like to explain one more command related to the remote access of the Cisco Router or S…
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Summary
- In this article, we discuss the command “live vty” and related configuration. vty stands for Virtual Teletype and is used to configure a virtual port to get the telnet or ssh access of Cisco Router/Switch. Cisco hardware support up to the 16 virtual port, i.e. (0,1,2,….15), on which administrators can telnet/ssh to gain remote access simultaneously. The command, line vty 0 4…