Cisco ISR 4351 IOS Denali or Everest

[chathurangaj@kbsl.lk]

Hi all,

I have face a bug on my cisco ISR 4351 router.

This is the bug which i faced.

https://bst.cloudapps.cisco.com/bugsearch/bug/CSCuy04058

To fix this i need to upgrade the ios version. when im going to download the ios there are two different name and ios versions like Denali or Everest.

I just wanted to know the different between these two ios and what is the best one or most stable one.

current ios version is  Cisco IOS Software, ISR Software (X86_64_LINUX_IOSD-UNIVERSALK9-M), Version 15.5(3)S4b, RELEASE SOFTWARE (fc1)

Please help me to understand different between these two ios.

[Leo Laohoo]

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chathurangaj@kbsl.lk wrote:

Version 15.5(3)S4b, 

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I believe this is the ROMmon version. 

Did TAC gave you the latest recommended version to upgrade to?

[chathurangaj@kbsl.lk]

Yeah in TAC case suggested use either Everest-16.6.4 MD or Denali-16.3.7
MD

But i just wanted to select one of from these two.

[Leo Laohoo]

You'll need to read the Release Notes of either releases and make that decision yourself.