i have an issue with an ISR4331 Box. My aim is to install IOS 16.09.04 on the box currently running at 155-3.S4b.
#sh run | sec boot
boot system flash bootflash:/isr4300-universalk9.16.09.04.SPA.bin
The path to the image is correct:
Directory of bootflash:/isr4300-universalk9.16.09.04.SPA.bin
15 -rw- 585126403 Jan 10 2020 09:02:12 +00:00 isr4300-universalk9.16.09.04.SPA.bin
3232477184 bytes total (1989283840 bytes free)
And the image itself is OK too:
Embedded Hash SHA1 : 87D928C49CBD8EFB40C0A06BF2EBFD57498F302B
Computed Hash SHA1 : 87D928C49CBD8EFB40C0A06BF2EBFD57498F302B
Starting image verification
Hash Computation: 100%Done!
Computed Hash SHA2: b026294539f32f3ea152a93347212005
Embedded Hash SHA2: b026294539f32f3ea152a93347212005
Digital signature successfully verified in file bootflash:/isr4300-universalk9.16.09.04.SPA.bin
Embedded hash verification successful.
After a reboot the Box still runs at 155-3.S4b. So i think it is a fallback after trying to boot 16.09.04.
i'm quite confused because i'm running this combination of HW and IOS on about 40 boxes without any issues and did the upgrade procedure about hundrets of times. Unfortunately i can't get the console output during boot because the box is installed at a remote site. The running logfile doesn't give any clues.
Any ideas how to troubleshoot this on a remote box with SSH access only?