Users can install system OS in the Global configuration mode using FTP/TFTP. The process to install OS using the FTP/TFTP server is as follows:
 
Step 1: Installs a FTP/TFTP server program on the user PC.
Step 2: Downloads new software in the root directory of the installed FTP/TFTP server program.
Step 3: Connects the user PC and devices with console cables, and sets the IP address in the interface of the device.
Step 4: Sets the user PC serial port to “baud rates : 9600, data bits : 8, stop bit : 1, parity : None”.
Step 5: Checks if the user PC can communicate with the device using Ping and installs the new software in the flash memory of the device using the CU command. 
Step 6: Checks if the new software is successfully installed on the system and selects the new software using the CU command.
Step 7: Reloads the system.
 
Before reloading, save important configurations. 
 
Do not turn off while saving the system software.
 
1.1.1 Installing the System OS From a FTP Server
 
To download OS using a FTP server, use the following command:
 

Command	Function
copy ftp image A.B.C.D USERNAME PASSWD Remote-FILE {first|second} Downloads OS from a FTP server.	The following example shows how to install OS from a FTP server.

Switch# ping 192.168.1.1
PING 192.168.1.1 (192.168.1.1): 56 data bytes
64 bytes from 192.168.1.1: icmp_seq=0 ttl=64 time=3.2 ms
64 bytes from 192.168.1.1: icmp_seq=1 ttl=64 time=4.0 ms
64 bytes from 192.168.1.1: icmp_seq=2 ttl=64 time=4.0 ms
64 bytes from 192.168.1.1: icmp_seq=3 ttl=64 time=4.0 ms
64 bytes from 192.168.1.1: icmp_seq=4 ttl=64 time=4.0 ms
 
Switch# copy ftp image 192.168.1.1 1 1 OS-1.1.3-20120717.bin first
Switch#
>> UPGRADE: Starting upgrade S/W on SECOND bank !!
>> UPGRADE: Download image file OS-1.1.3-20120717.bin
 
Switch# >> UPGRADE: Fusing S/W image
 
* UPGRADE completed !!!
 
Switch#
Switch# boot-image first
Switch# reload
running-config and startup-config differ, save? (y/n) [n]: y
saved.
proceed with reload? (y/n) [n]: y
 
Never reboot or turn off the system before the message “UPGRADE completed !!!.” is displayed.
 
1.1.2 Installing the System OF from a TFTP Server
 
To download OS using a TFTP server, use the following command:
 

Command	Function
copy tftp image A.B.C.D Remote-FILE {first|second}	Downloads OS from a TFTP server.

The following example shows how to install OS from a TFTP server.
 
Switch# ping 192.168.1.1
PING 192.168.1.1 (192.168.1.1): 56 data bytes
64 bytes from 192.168.1.1: icmp_seq=0 ttl=64 time=3.2 ms
64 bytes from 192.168.1.1: icmp_seq=1 ttl=64 time=4.0 ms
64 bytes from 192.168.1.1: icmp_seq=2 ttl=64 time=4.0 ms
64 bytes from 192.168.1.1: icmp_seq=3 ttl=64 time=4.0 ms
64 bytes from 192.168.1.1: icmp_seq=4 ttl=64 time=4.0 ms
 
Switch# copy tftp image 192.168.1.1 OS-1.1.3-20120717.bin first
Switch#
>> UPGRADE: Starting upgrade S/W on SECOND bank !!
>> UPGRADE: Download image file OS-1.1.3-20120717.bin
 
Switch# >> UPGRADE: Fusing S/W image
 
* UPGRADE completed !!!
 
Switch#
Switch# boot-image first
Switch# reload
running-config and startup-config differ, save? (y/n) [n]: y
saved.
proceed with reload? (y/n) [n]: y