Cisco ISR 4331 OS upgrade

[asfandyar779514494]

Hi Guys,

I am looking to upgrade the ISR 4331 RTR, I was looking around and saw that Rommon upgrade is also needed.

Current version: 19.9.03

To be upgraded version: 17.09.04a

[Leo Laohoo]

Cisco ISR & ASR 1k Routers: IOS-XE/Firmware Upgrade (Install Mode)

[DanielP211]

Hello!

You probably made a mistake. The current version is 16.9.03? So first you have to establish which type of upgrade you want? Bundle or install. If you currently have install mode and want to stay on it you will have to upgrade rommon also. Check the version of rommon before. If you upgrade in bundle mode the rommon upgrade will happen automaticaly. 

[M02@rt37]

Hello @asfandyar779514494 

Follow this please :

https://stonelee2005.github.io/2021/05/13/How-to-Upgrade-IOS-XE-OS-on-ISR-4K-Series/