# Notes - VTY lines (IOS-XR) ### VTY Lines By default, VTY lines 0-4 are available for access for virtual terminal sessions (i.e. telnet and SSH). The default line template applies to these lines. You have the ability to control three lines: * console * custom (named and applied to the vty-pool) * default * Attributes not defined in **line console** or **line template \** are taken from **line default** You will typically use the default line template. This does not need to be applied to the vty lines, because they use the default line template already. ``` line default width 256 ```

To create your own custom line template use **line template \** and apply it to the specified vty lines via the **vty-pool** statement. You can either apply the template to the default pool (which must begin at 0), or to a user-defined pool name (which must start at vty number 5 or higher). ``` line template X width 312 ! vty-pool default 0 4 line-template X ```

The **line console** template will only apply to the physical console port. ### SSH/Telnet Note that SSH and/or telnet must be explicitly enabled: ``` ssh server [vrf ] telnet [vrf ] ipv4|ipv6 server max-servers ``` ### Default vty-pool size By default, there are 5 vty lines defined. This limits the max number of simulataneous vty sessions to five. To increase this, you can increase the default vty-pool: ``` vty-pool default 0 <4-99> [line-template ] ``` ### Further Reading