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kasunrajapakse
Beginner

Cisco ASA 5545 Boot Image Priority

Hi All,

One quick question. 

 

Let's say we boot 2 images on the boot system like the following

 

vpnb# sh run boot
boot system disk0:/asa943-smp-k8.bin
boot system disk0:/asa941-smp-k8.bin
vpnb#

 

If the first image fails/or if it's corrupted while booting the device, will the ASA router pick the second image and boot correctly?

 

Thanks

 

1 ACCEPTED SOLUTION

Accepted Solutions
Cristian Matei
VIP Collaborator

Hi,

 

  ASA will try the second specified image only if the first image is unavailable, not if it’s corrupted.

 

Regards,

Cristian Matei.

View solution in original post

4 REPLIES 4
Cristian Matei
VIP Collaborator

Hi,

 

  ASA will try the second specified image only if the first image is unavailable, not if it’s corrupted.

 

Regards,

Cristian Matei.

View solution in original post

Hi Cristian, 

Thanks alot for the quick reply. 

Is there anyway we can to make sure that the image I set on top (on boot priority) is not corrupted and all good?

Like a hash check?

 

vpnb# show disk0: all | inc Feb 26
104 84805632 Feb 26 2020 16:20:30 asa963-1-smp-k8.bin
105 26709020 Feb 26 2020 16:23:56 asdm-771.bin
vpnb# 

 

I want to upgrade to "asa963-1-smp-k8.bin" which is currently sitting on disk0. But I just want to have a plan B before I set this new image as a boot image and perform a reload. 
Any advice?

 

Thanks

 

Hi,

 

   Yes there is, use the "verify /md5" and "verify /sha-512" commands to verify that the MD5/SHA hash is valid. Use this document for further reference.

 

Regards,

Cristian Matei.

cheers!