TTY is a physically connected one, via the serial/console port. VTY is a virtually connected one, via telnet or SSH. Both will get you to a command line interface.

"Command line, or EXEC, access to a router can be made in a number of ways, but in all cases the inbound connection to the router is made on a TTY line. There are four main types of TTY lines: The CTY line-type is the Console Port. On any router, it appears in the router configuration as line con 0 and in the output of the show line command as ...

Hi! In PT . Router#show line . Tty Line Typ Tx/Rx A Roty AccO AccI Uses Noise Overruns Int * 0 0 CTY - - - - 0 0 0/0 -

Those are not the vty line numbers, instead they are the tty line numbers. If you want to see the tty to vty mapping you can issue the command "sh users all", example: 194 vty 0 <-- 194 = tty line, 0 = vty line. 195 vty 1 <-- 195 = tty line, 1 = vty line. and so on ... Regards, Aref

I don't get the point: You clear the (tty / interactive) line (console / vty) using 'clear line vty'. clear tcp line might be related to some modem / slip / ppp functionality from the past.

The column you are referring to is for TTY lines, where the VTY, console, aux and I think any other access to the device would be mapped to. If you issue the command show users you will see the VTY you are talking about, and I think if you issue the command show users all you will see the mapping between the TTY and VTY lines.

virtual tty (vty) lines for Telnet, SSH, and FTP services. Each Telnet, SSH, or FTP session requires one vty line. When you connect to the router through a vty line, the number of the vty line is not assigned sequentially; instead, the system assigns the first vty line that passes the host access list check rules.

I think what u looking for is clear line tty # number of line to disconnect. there is (or should be) a keyboard shortcut also. why Ctrl-Shift-6 then X does not work? it should. once in cli of remote device, do Ctrl-Shift-6 then X to go back, then following" show sessions to see sessions numbers. disconnect # session number to disconnect session #

Hi Efx, interesting script, im currently trying to develop some automation scripts myself. from what i understood so far, you cannot "send" a command, the way you can do this is to script a logon into the other router and then issue the command you want.

There is no special difference other than the amount of available lines vty to access remotely by SSH/Telnet to a device cisco. The recommendation or common using is configure 5 lines (line vty 0 4) In CLN, there is a discussion about vty lines. Why 0 and 4 in "line vty 0 4" Best regards!