Factory default Cisco Device

CiscoSwitch#write erase
Erasing the nvram filesystem will remove all configuration files! Continue? [confirm]
[OK]
Erase of nvram: complete
CiscoSwitch#del flash:/vlan.dat
Delete filename [vlan.dat]?
Delete flash:/vlan.dat? [confirm]
CiscoSwitch#reload


Would you like to enter the initial configuration dialog? [yes/no]:no

switch#wr

Delete Old version of IOS from the device

Switch#sh flash

Directory of flash:/

    2  -rwx        3096   Mar 1 1993 00:01:40 +00:00  multiple-fs
    3  -rwx        1934   Mar 1 1993 00:01:40 +00:00  private-config.text
    4  -rwx        1781   Mar 1 1993 00:01:40 +00:00  config.text
    5  -rwx    15072310   Mar 1 1993 00:24:49 +00:00  c3560-ipbasek9-mz.122-58.SE2.bin
    6  -rwx    11752155  Jun 28 2011 08:03:25 +00:00  c3560-ipbasek9-mz.122-55.SE1.bin

32514048 bytes total (5680128 bytes free)
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our old version of IOS is c3560-ipbasek9-mz.122-55.SE1.bin

Login in to cisco device using console

in Enable mode, put following command to delete old IOS image file/directory

#delete /recursive /force flash:/c3560-ipbasek9-mz.122-55.SE1.bin

#wr

#reload

CISCO IOS Update

Establish IP communication with Cisco device to connected PC.
If cisco to pc not pinging but you have setup ip correctly then disable firewall in your windows pc.

download tftp server, run tftp server in your PC which is connected with the cisco device.

PC IP is 192.168.1.1
Net mask 255.255.255.0

copy new version of IOS to tftp server root folder, ex. C:\TFTP-Root\
as example we assume our new version of IOS is c3560-ipbasek9-mz.122-58.SE2.bin

Login in to cisco using console cable


>en
#copy tftp: flash:
Address or name of remote host []? 192.168.1.1
Source filename []? c3560-ipbasek9-mz.122-58.SE2.bin
Destination filename [c3560-ipbasek9-mz.122-58.SE2.bin]?
Accessing tftp://192.168.1.1/c3560-ipbasek9-mz.122-58.SE2.bin...
Loading c3560-ipbasek9-mz.122-58.SE2.bin from 192.168.1.1 (via GigabitEthernet0/1): !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
[OK - 15072310 bytes]

15072310 bytes copied in 337.180 secs (44701 bytes/sec)

Switch#sh flash

Directory of flash:/

    2  -rwx        3096   Mar 1 1993 00:01:40 +00:00  multiple-fs
    3  -rwx        1934   Mar 1 1993 00:01:40 +00:00  private-config.text
    4  -rwx        1781   Mar 1 1993 00:01:40 +00:00  config.text
    5  -rwx    15072310   Mar 1 1993 00:24:49 +00:00  c3560-ipbasek9-mz.122-58.SE2.bin
    6  -rwx    11752155  Jun 28 2011 08:03:25 +00:00  c3560-ipbasek9-mz.122-55.SE1.bin

our old version of IOS is c3560-ipbasek9-mz.122-55.SE1.bin
our new version of IOS is c3560-ipbasek9-mz.122-58.SE2.bin

Now we need to boot our cisco device using new IOS.

(config)#boot system flash:/c3560-ipbasek9-mz.122-58.SE2.bin
(config)#^Z

#wr
#reload
now you can check current version after reload by using following command

#sh ver


#sh ver
Cisco IOS Software, C3560 Software (C3560-IPBASEK9-M), Version 12.2(58)SE2, RELEASE SOFTWARE (fc1)
Technical Support: http://www.cisco.com/techsupport
Copyright (c) 1986-2011 by Cisco Systems, Inc.
Compiled Thu 21-Jul-11 01:44 by prod_rel_team

ROM: Bootstrap program is C3560 boot loader
BOOTLDR: C3560 Boot Loader (C3560-HBOOT-M) Version 12.2(44)SE5, RELEASE SOFTWARE (fc1)

Switch uptime is 49 minutes
System returned to ROM by power-on
System image file is "flash:/c3560-ipbasek9-mz.122-58.SE2.bin"

CISCO IOS IP assign

#enable
#configure terminal
#interface vlan1
#ip address 192.168.1.11 255.255.255.0
#no shutdown
#exit

ctrl + z
wr