Entering Cli Commands Using An Ssh Connection; Executing Local Cli Scripts Using An Ssh Connection - Dell S4820T Configuration Manual

Hide thumbs Also See for S4820T:

Table of Contents

Entering CLI commands Using an SSH Connection

You can run CLI commands by entering any one of the following syntax to connect to a switch using the

preconfigured user credentials using SSH:

ssh username@hostname <CLI Command>

echo <CLI Command> | ssh admin@hostname

The SSH server transmits the terminal commands to the CLI shell and the results are displayed on the

screen non-interactively.

You can execute CLI commands by entering a CLI script in one of the following ways:

ssh username@hostname <CLIscript.file>

cat < CLIscript.file > | ssh admin@hostname

The script is run and the actions contained in the script are performed.

Following are the points to remember, when you are trying to establish an SSH session to the device to

run commands or script files:

There is an upper limit of 10 concurrent sessions in SSH. Therefore, you might expect a failure in

executing SSH-related scripts.

To avoid denial of service (DoS) attacks, a rate-limit of 10 concurrent sessions per minute in SSH is

devised. Therefore, you might experience a failure in executing SSH-related scripts when multiple

short SSH commands are executed.

If you issue an interactive command in the SSH session, the behavior may not really be interactive.

In some cases, when you use an SSH session, when certain show commands such as show tech-

support produce large volumes of output, sometimes few characters from the output display are

truncated and not displayed. This may cause one of the commands to fail for syntax error. In such

cases, if you add few newline characters before the failed command, the output displays completely.

Execution of commands on CLI over SSH does not notice the errors that have occurred while executing

the command. As a result, you cannot identify, whether a command has failed to be processed. The

console output though is redirected back over SSH.

Getting Started

Show Quick Links

Table of Contents