Difference between vty lines 0 4 and 5 15 (2024)

FAQs

What is the difference between line vty 0 4 and line vty 0 15? ›

Simultaneous Connections: line vty 0 4 supports fewer simultaneous remote connections compared to line vty 0 15. The former supports up to 5 connections, while the latter supports up to 16 connections.

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).

Finally, level 15 allows full access to all router commands.

When you need remote access to your router or switches you have to configure vty. Without vty configuration you have no remote access to your remote router and switches such as telnet and ssh. Some routers and switches has vty lines from 5 to 16 this means 5 to 16 virtual sessions. Hope you like it.

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.

Virtual Teletype (VTY) lines indicate the possible simultaneous connections allowed to a particular router from a socket availability perspective, being 0 through 5 or any arbitrary range, this is what signifies.

A VTY line is used for SSH and Telnet access to the device. Here you configure login parameters and password. A VLAN interface is in simplest terms the Layer 3 interface for a VLAN, allowing you to configure an IP address on it.

Some Cisco routers do have VTY lines 0 to 15, and some older Cisco switches only have VTY lines 0 to 4. As far as I know, you can configure line vty 0 15 on a Cisco 1941 router. It won't show lines 5 to 15 unless you actually configure them.

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 is the VTY line and what is the difference between line VTY 0 4, line VTY 5 15, and line VTY 0 15. The full form of VTY is Virtual teletype. This interface is used in a Cisco router and switches to establish connectivity with other devices via telnet protocol.

What is privilege level 15 in Cisco ISE? ›

Level 15: Full Access to all commands, such as the "Reload" command, and the ability to make configuration changes.

Level 15 is privileged-Exec access, with access to Enable and Configuration mode and access to change things on the device. The other levels can be configured with specific commands.

The abstract “0 - 4” means that the device can allow 5 simultaneous virtual connections which may be Telnet or SSH. In a way, we may say that 5 (0 – 4) are connection ports to the Router or Switch. In fact, we may have connection ports up to 16 (0 – 15).

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.

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.

Cisco devices can have up to 16 VTY lines.

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.