Two IOS Version in One Cisco ASA

[danielbusisa1410]

Hi All,

I have cisco ASA as standby unit and there are two IOS version on it. 9.5 and 9.8. I use 9.5 between active and standby unit but suddenly standby unit is restart and IOS version changed to 9.8. 

Is there any suggestion for this situation? i want use ios version  9.5 when the device restart or not but I won't to deleted the 9.8 version.

Thank you for your light

[balaji.bandi]

if you looking Active / Standby setup

both need to same version, if not you will see some unknown issues around.

So take quick action and move other ASA like same as Active. (for better and stability)

to remove this kind of situation remove any unwanter Code from the device so you will not see any surprises in the future.

[danielbusisa1410]

Hi Balaji,

Thank you for your reply, 

Can the ASA store more then 2 IOS version in flash: ?

Thank you

[balaji.bandi]

yes you have as many Code in the flash as long as it has enough space.

we need to need more about your boot statement, i was very odd it booted with 9.8 even if you have boot variable 9.5

so please post show boot

[danielbusisa1410]

Hi Balaji,

Sorry i can't share it due to i can't access the ASA but thank you for your information i will share it once i can access it

Thank you

[Sheraz.Salim]

I have cisco ASA as standby unit and there are two IOS version on it. 9.5 and 9.8. I use 9.5 between active and standby unit but suddenly standby unit is restart and IOS version changed to 9.8.

Is there any suggestion for this situation? i want use ios version 9.5 when the device restart or not but I won't to deleted the 9.8 version.

what you can do is log in to active asa issue a command.

example

show bootvar

BOOT variable = disk0:/asa9.5-15-smp-k8.bin
Current BOOT variable = disk0:/asa9.5-15-smp-k8.bin
CONFIG_FILE variable =
Current CONFIG_FILE variable =

now in order to yout to change them so both images can match the same version. go to cli and issues these commands

write standby

other method.

you log into stanby firewall and issue this command

show bootvar

BOOT variable = disk0:/asa984-15-smp-k8.bin
Current BOOT variable = disk0:/asa984-15-smp-k8.bin

change this to 9.5

boot config flash:/asa9.5

boot var flash:/asa9.5

no boot config flash://asa9.8

no boot var flash:/asa9.8

once make the change double check the new OS is 9.5

show bootvar

and write me it

BOOT variable = disk0:/asa9.5-15-smp-k8.bin Current BOOT variable = disk0:/asa9.5-15-smp-k8.bin

[danielbusisa1410]

Hi Sheraz,

Thank you for your reply, i'd like to know why cisco ASA change the suddenly ? what is indicator the ios version change? because in my problem the ASA change to the higher version when it restart (9.8).

Is it normal when ASA restart, ios version change to higher version? i have 2 ios version in my ASA

Thank you

[Sheraz.Salim · Accepted solution]

no it should not be doing this.

could you share the follwoing output on both friewalls

show version

show bootvar

show failover | i host

[danielbusisa1410]

Hi Sheraz,

Sorry i can't share it due to i can't access the ASA but i will share it once i can access it

Thank you i will inform you later