Monday, November 30, 2015

Upgradig Cisco IOS on Catalyst Switch/3750 using CLI from Local Computer.

Assign IP to VLAN iterface to your switch e.g VLAN1|

Switch(config)#interface vlan 1
Switch(config-if)#ip address

Assign IP of same subnet to you local PC
no need defaulg gateway

Verify connection


Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to, timeout is 2 seconds:
Success rate is 100 percent (5/5), round-trip min/avg/max = 1/203/1006 ms

Download, install,RUN TFTP server on local computer

Copy the latest firmware to TFTP directory.

Check the flash available memory space, about 20MB is free.

Switch#show flash

Directory of flash:/

    2  -rwx        2072   Mar 7 1993 00:09:32 +00:00  multiple-fs
    8  drwx         192  Apr 14 1993 14:17:45 +00:00  c3750-ipbasek9-mz.122-46.S     E

32514048 bytes total (20837888 bytes free)

Start copying and provide the source file name

Switch#copy tftp flash:
Address or name of remote host []?
Source filename []? c3750-ipbasek9-mz.122-55.SE7.bin
Destination filename [c3750-ipbasek9-mz.122-55.SE7.bin]?
Accessing tftp://
Loading c3750-ipbasek9-mz.122-55.SE7.bin from (via Vlan1): !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
[OK - 12098366 bytes]

12098366 bytes copied in 280.692 secs (43102 bytes/sec)


Copying with scp

Switch#copy scp://username@ flash:

Existing Boot IOS info

Switch#show boot
BOOT path-list      : flash:c3750-ipbasek9-mz.122-46.SE/c3750-ipbasek9-mz.122-46.SE.bin
Config file         : flash:/config.text
Private Config file : flash:/private-config.text

Changing the Boot to new IOS image

Use command in global config boot system flash:/ in 
Switch#conf t
Enter configuration commands, one per line.  End with CNTL/Z.

Switch(config)#boot system flash:/c3750-ipbasek9-mz.122-55.SE7.bin
Switch#show boot
*Mar  1 00:34:25.308: %SYS-5-CONFIG_I: Configured from console by consolet
BOOT path-list      : flash:/c3750-ipbasek9-mz.122-55.SE7.bin
Config file         : flash:/config.text
Private Config file : flash:/private-config.text

Reload/restart switch


System configuration has been modified. Save? [yes/no]: no
Proceed with reload? [confirm]

*Mar  1 00:38:56.025: %SYS-5-RELOAD: Reload requested by console. Reload Reason: Reload command.

Delete OLD IOS

Switch#delete /force /recursive flash:c3750-ipbasek9-mz.122-46.SE

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