How to change ASA 8.4.3 to 8.2.5

[TM13]

      I just got ASA 5520 with 8.4.3 and I have copied 8.2.5 and changed the boot system and erased all start-up configs, but still i am receiving below commands, how to remove those context configs and make it single firewall?

ciscoasa(config)# boot system flash:/asa825-k8.bin

INFO: Converting flash:/asa825-k8.bin to disk0:/asa825-k8.bin

ciscoasa(config)#

ciscoasa# sh run

: Saved

:

ASA Version 8.4(3) <system>

!

hostname ciscoasa

enable password 8Ry2YjIyt7RRXU24 encrypted

no mac-address auto

!

interface GigabitEthernet0/0

shutdown

!

interface GigabitEthernet0/1

shutdown

!

interface GigabitEthernet0/2

shutdown

!

interface GigabitEthernet0/3

shutdown

!

interface Management0/0

shutdown

!

class default

  limit-resource All 0

  limit-resource ASDM 5

  limit-resource SSH 5

  limit-resource Telnet 5

!

boot system disk0:/

boot system disk0:/asa825-k8.bin

ftp mode passive

pager lines 24

no failover

no asdm history enable

arp timeout 14400

console timeout 0

prompt hostname context

Cryptochecksum:3cb1097df1c660fd281987617e23a832

: end

ciscoasa#

[Marvin Rhoads · Accepted solution]

While in system execution space:

conf t

mode single

exit

wr mem

Reload when prompted

Reference

[TM13]

Thanks but still showing

Evaluating BIOS Options ...

Launch BIOS Extension to setup ROMMON

Cisco Systems ROMMON Version (1.0(11)5) #0: Thu Aug 28 15:23:50 PDT 2008

Platform ASA5520

Use BREAK or ESC to interrupt boot.

Use SPACE to begin boot immediately.

Launching BootLoader...

Boot configuration file contains 2 entries.

Searching disk0:/ for images to boot.

Loading disk0:/asa843-k8.bin... Booting...

Platform ASA5520

Should i delete the IOS?

[Marvin Rhoads]

Your system execution space configuration file seems to not recognize that you have told it to boot into an ASA 8.2(5) image. If you're sure that you have good image binary file on disk0:, you can delete the 8.4(3) image from disk0: and reload once again.

It is a bit odd to go backwards though. Most people here are trying to figure out how to move forwards.

By the way, IOS is switch and router software. The ASA simply runs ASA (Adaptive Security Appliance) software.

[TM13]

Hmmm, strange, deleted and worked, you know cisco is famous on long live ... , some equipments still running ...