I have face a bug on my cisco ISR 4351 router.
This is the bug which i faced.
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.