Transport command

[gauravprakash]

HI all,

Today I faced a problem with 1721 series router which is worth sharing. I could ping the router but could not telnet into it. There was no access list on the line vty 0 4,

I gained access to the router only when I asked the tech to put the following commands on the line vty0 4:

line vty 0 4

exec-timeout 60 0

password xxx

transport preferred pad

transport input pad telnet rlogin udptn

transport output pad telnet rlogin udptn

[thisisshanky]

What message did you get when you tried to telnet ? Just timeout ?

[gauravprakash]

I got a message "Connection refused by remote host"

[Harold Ritter]

Is it possible that "transport input none" had been configured previously.

Hope this helps,

[gauravprakash]

It could be I am not very sure . But would it have worked without the Tranport commands at all?

[Harold Ritter]

If you use the default configuration (nothing configured under the line vty 0 4 command) and do a "sh line vty 0", you should see that the trasport input is pad and telnet, which would allow you to telnet to the box.

Hope this helps,

[gauravprakash]

is transport command neccesary on 1721 with 12.3 ? if yes why?

[Harold Ritter]

This is not platform specific. The default has not changed in 12.3 so you should be able to telnet to the router unless someone changed that default.

Hope this helps,

[Harold Ritter]

By the way, the best way to verify this is to remove the "transport input" command from the line vty 0 4 configuration and try the telnet again.

Hope this helps,