Hi,
We have a Cisco ASA firewall 5580 running with 12 context. There is a plan to upgrade the devices to 9.1(7)4 version ( the highest supported version on this model). There are 2 plans for us to decide on.
Plan 1
1.Upload the image 9.0(4) to the Secondary device (standby) & upgrade to 9.0(4) from 8.4(4)5 by changing the bootvar & reload.
2.Upload the image 9.1(7)4 to the Secondary device (standby) & upgrade to 9.1(7)4 from 9.0(4) by changing the bootvar & reload.
Once the secondary device is successfully upgraded to 9.1(7)4 , repeat the same above steps in Primary device after making the secondary device active.
Plan 2
1.Upload the image 9.0(4) to the Secondary device & upgrade to 9.0(4) from 8.4(4)5 by changing the bootvar & reload.
2. Make Secondary device as Active
3.Upload the image 9.0(4) to the Primary device & upgrade to 9.0(4) from 8.4(4)5 by changing the bootvar & reload.
4.Upload the image 9.1(7)4 to the Primary device & upgrade to 9.1(7)4 from 9.0(4) by changing the bootvar & reload.
5. Make Primary device as Active
6.Upload the image 9.1(7)4 to the Secondary device & upgrade to 9.1(7)4 from 9.0(4) by changing the bootvar & reload.
Could someone suggest which is the best recommended plan ( 1 or 2 ) that will work perfectly and there is no unforeseen issues.
I have a gut feeling there may be some failover issue in the plan 1. Looking for an immediate answer.