wts the difference between those two ios ??

[Dr.X]

i have a cisco router 7206

i performed two commands on the same router

NS-Gateway#sh bootflash:

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

1   .. image        D9C0D081  80F474   29  7926772 Sep 15 2000 07:01:42 +00:00 c7200p-kboot-mz.124-4.XD5.bin

57609100 bytes available (7926900 bytes used)

NS-Gateway#sh dis

NS-Gateway#sh disk2:

-#- --length-- -----date/time------ path

1         6696 Dec 01 1999 00:54:16 config11

2     39814568 Sep 21 2010 09:23:42 c7200p-adventerprisek9-mz.124-24.T4.bin

216678400 bytes available (39825408 bytes used)

wts the diffrent between the two ioses ??

wts the different between the ios

c7200p-kboot-mz.124-4.XD5.bin 

and the ios

c7200p-adventerprisek9-mz.124-24.T4.bin

noe that the 1st ios has only 7 mega and the 2nd one has 37 mega

my question is , wt ios flash does the  router boot , and why two ioses in two places are exist ??  wt is disk2 place ???

i just know that there is a flash memeory to hold the ios of the router , so wts the disk 2  ios image ????

with my best regards

[Richard Burts]

The first/small file is for the boot loader. This is used in the initial stages of booting the router and it is small because it does not do the wide range of functions in the regular IOS image. The second/larger file is the regular IOS which is run after the bootloader has completed. This is the IOS that has all the features that you use in normal operation and that is why it is a larger file.

HTH

Rick

[Dr.X]

hi ,richard ,

thanks for ur help ,

i have another question ,

if i want to to put another ios  which is more update to the current one ,

should i upload one ios file, or two ios files ??

as u see there are two places , one in boot flash and the second in disk ,

with my best regards

[Richard Burts]

If you want to upgrade the version of IOS that the switch is running then you need to upgrade the regular IOS on disk2. There are some circumstances where you would also need to upgrade the boot loader code (especially if you are introducing a new card which might not be supported by the old bootloader). But upgrading the boot loader code is much less frequently done than upgrading the regular IOS code.

HTH

Rick