Before you make configuration changes on devices you should make a backup of the device. You can basically use any platform you want to backup Cisco devices. Doing so in Mac OS X starts with the Terminal. So to backup a Cisco device you must first connect to the device in Terminal either through SSH or Telnet.
Then SSH to the device using the ssh command, followed by the username, an @ symbol and then the IP address or hostname of your device. Here, we’ll use an example of 64.32.49.172:
ssh admin@64.32.49.172
Note: One could also use telnet using the same type of string, but ssh is more secure.
Next, provide the password and you will see a prompt with the device name. Once connected to the device you will need to go into enable mode by typing “en” at the command prompt and hit enter. It may prompt you for an elevated privileges password, which you will need to know.

Once complete you will notice that the prompt turns from a > to a # symbol. The # symbol is akin to having root access. Now to backup the configuration of this device you will enter “show run” which is short for show running-config:
show run
You will see a ←-more→ prompt at the bottome of the page. Just hit the space bar until you are back a the prompt. Once you are at the prompt you will highlight all the text using your mouse that was just generated in the terminal and after its all highlighted hit “Command C” to copy the contents. Open your favorite text editor and use the “Command V” to paste the text. Be careful to use plain text here (I prefer to just use pico or vi rather than Word or TextEdit). Save the file as your configuration backup file for the Device.
NOTE: If you want to also get the IOS (IOS is different than iOS) version info you can run the “show version” instead of the “show run” command. And use the same steps to cut and paste.
If you cannot log into a device remotely, you can use a Keyspan adapter to use the serial port to connect to the device.

statistics of bandwidth allocation for Xsan clients. But Vmeter doesn’t stop there. It also allows you to meter, or limit, the amount of bandwidth that is allocated to client machines, maximizing bandwidth for some users and tiering your performance allocation.