In IOS boot sequence if the flash is erased, and there is
no access to TFTP server, and we can't load the partial IOS
from ROM. Is there any possiblity that we can still boot
the router/switch from external PC in which the IOS is
installed?

Answers were Sorted based on User's Feedback



In IOS boot sequence if the flash is erased, and there is no access to TFTP server, and we can..

Answer / jitendera sinha

i am not confrim it is wright or not but letme try amd let
me know i am wright or wrong

1 downlaod a softwair based tfftp server on your computer
like TFTPD32 tftp server

2 downlaod the ios image from internet or if you have

3 pweron the switch

4 press the key break

5 load the downladed ios in that tftp server

6 load that ios from tftp to routr or switches


Follow this procedure if you want to upgrade cisco IOS

NOTE :- Before doing any upgrades plesae take a complete
backup of your cisco device configuration for safer side

Download the Correct version of Cisco IOS for you from here
http://www.cisco.com/tacpage/sw-center/index.shtml

Write Unsaved configurations

ciscorouter# write memory
Building configuration…
[OK]

Check space on Flash Memory

ciscorouter# show flash

Make sure you have the space left on your cisco device.

Backup Startup Configuration

Setup a TFTP server in the same IP range as the Cisco
device to backup the configs, IOS image and also for later
to upload the new IOS image.

testrouter# copy startup-config tftp
Address or name of remote host []? 10.10.10.2
Destination filename [startup-config]?
!!
1278 bytes c opied in 0.100 secs

Backup Current IOS Image

testrouter# copy flash: tftp:
Source filename []? xxxxx-xx-xx.121-x.XB
Address or name of remote host []? 10.10.10.2
Destination filename [xxxxx-xx-xx.121-x.XB]?

Now, Load the new IOS image from the TFTP onto the flash

ciscorouter#copy tftp: flash:
Address or name of remote host []? 10.10.10.2
Source filename []? c3560-ipbasek9-mz.122-40.SE.bin
Destination filename [c3560-ipbasek9-mz.122-40.SE.bin]?
Accessing tftp://10.10.10.2/c3560-ipbasek9-mz.122-40.SE.bin…
Loading c3560-ipbasek9-mz.122-40.SE.bin from 10.10.10.2
(via
Vlan1): !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

!!!!!!!!!!
[OK - 8295106 bytes]

8295106 bytes copied in 124.571 secs (66589 bytes/sec)

Now you need to make sure you are booting with the correct
version of IOS image for this you need to use the following
command to set.

testrouter(config)#boot system flash:/c3560-ipbasek9-mz.122-
40.SE.bin

Now you need to reload the Cisco Router

testrouter# reload

After rebooting cisco device with the new Cisco IOS image
you need to make sure this use the following command

testrouter# sh ver

That’s it now we are using the latest IOS on your cisco
device

i donot know it will work or not but try it




try it till then any of the best answer

Is This Answer Correct ?    3 Yes 1 No

In IOS boot sequence if the flash is erased, and there is no access to TFTP server, and we can..

Answer / jitendera sinah

http://www.informit.com/library/content.aspx?
b=CCIE_Practical_Studies_I&seqNum=22


go throug tha link



first time i got a good problem i have uploaded many time
ios but never found that type of problem if you find the
soln then plz make the answer.i am waitng of that answer
disspretly

thanks

Is This Answer Correct ?    0 Yes 0 No

In IOS boot sequence if the flash is erased, and there is no access to TFTP server, and we can..

Answer / arbaz ahmad

thx for your answers.

Is This Answer Correct ?    0 Yes 0 No

In IOS boot sequence if the flash is erased, and there is no access to TFTP server, and we can..

Answer / arbazahmad

well the ios can also be loaded into the switch without
the use of tftp server by "xmodem"
go thru this link--
http://www.cisco.com/en/US/products/hw/routers/ps259/product
s_tech_note09186a008015bfac.shtml

Is This Answer Correct ?    0 Yes 0 No

In IOS boot sequence if the flash is erased, and there is no access to TFTP server, and we can..

Answer / gt

any ways.. i cudn't get the perfect one as the same thing
saying by other as Jitendra said they never got problem like
this.
And tx Jitendra for providing us the informit.com site which
is quite good.

Is This Answer Correct ?    0 Yes 1 No

In IOS boot sequence if the flash is erased, and there is no access to TFTP server, and we can..

Answer / s.m.feroz ahmed

Hi,

1) IOS is an operating system installed on Router.
2) Flash is a startup and running configuration on IOS
3) TFTP is a freeware one can install anytime.

If Flash is deleted one can restart router by restarting
while restarting press Pause|Break it will take to router
IOS mode copy the startup configuration to TFTP server and
try to do changes and restart router and you are into
router config .

Is This Answer Correct ?    0 Yes 1 No

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