Reference 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.

Default Configuration

A version of Dell Networking OS is pre-loaded onto the chassis; however, the system is not configured

when you power up for the first time (except for the default hostname, which is Dell). You must

configure the system using the CLI.

Accessing the USB-B Console Port

When you connect the USB-B port, it becomes the primary connection and, when the system is

connected, it sends all messages to the USB-B drive.

The terminal settings are the same for the USB-B port and the console port.

1. Power on the PC (Dell Networking recommends using the XP operating system).

2. Connect the USB-A end of cable into an available USB port on the PC.

3. Connect the USB-B end of cable into the USB-B console port on the S5000.

4. Power on the S5000.

5. Install the necessary USB device drivers (you need an internet connection). For assistance, contact

Dell Networking Technical Support.

6. Open your terminal software emulation program to access the S5000.

7. Set the terminal connection settings.

Getting Started