Multiple Operating System

[kpatoli]

Do we store two Cisco IOS version in the same flash memory?

If yes, Which version will be our default IOS and how we will configure the router to select the version we like?

[rmushtaq]

Yes, depending upon the flash size, you can have mupltipe IOS images in the same flash. For example, when I do a 'sh fla' on my router, I see two images:

#sh fla

-#- ED --type-- --crc--- -seek-- nlen -length- -----date/time------ name

1 .. image 56A887EA 90A5BC 20 9348412 Nov 05 2000 14:36:50 rsp-jsv-mz.120-9.bin

2 .. image 1F16E071 13193F8 21 10546620 Feb 22 2001 13:19:29 c3640-js-mz.120-7.XK1

683016 bytes available (19895288 bytes used)

And I've the following command in the router config which will make the router boot from the first IOS image in the flash:

boot system flash slot0:rsp-jsv-mz.120-9.bin

[kpatoli]

Dear Mushtaque,

Thanks for your kind response.

I just forget that command to choose the appropriate operating system.

I hope your cooperation will continue

Kashif