Administrator Guide

Executing Local CLI Scripts Using an SSH

Connection

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.

Boot Process

After you follow the Installation Procedure in the Getting Started Guide, the switch boots up.

The switch with the Dell Networking OS version 8.3.16.1 requires boot flash version 4.0.1.0 and boot selector

version 4.0.0.0. The following example shows the completed boot process.

syncing disks... done

unmounting file systems...

unmounting /f10/flash (/dev/ld0e)...

unmounting /usr (mfs:31)...

unmounting /lib (mfs:23)...

unmounting /f10 (mfs:20)...

unmounting /tmp (mfs:15)...

unmounting /kern (kernfs)...

unmounting / (/dev/md0a)... done

rebooting...

Getting Started 54