ISR 4331 upgrade from 17.3 to 17.6

[adeebtaqui]

Hi,

Kindly advise if we just need to download the 17.6 file and upload on router to have a successfull upgrade from 17.3 to 17.6 or do we need a rommon upgrade as well.

[Kasun Bandara]

check if your router have rommon version 16.12(2r). check below guide for 17.6.x

https://www.cisco.com/c/en/us/td/docs/routers/access/4400/release/xe-17-6/isr4k-rel-notes-xe-17-6.html#con_180601

[balaji.bandi]

When you upgraded to 17.3 the ROMMON already upgrade - you can check issue show version and show platform.

Also check exiting mode install or bundle mode.

read the release notes :

https://www.cisco.com/c/en/us/td/docs/routers/access/4400/release/xe-17-6/isr4k-rel-notes-xe-17-6.html

upgrade guide :

https://community.cisco.com/t5/networking-knowledge-base/cisco-isr-amp-asr-1k-routers-ios-xe-firmware-upgrade-install/ta-p/4426457

[Leo Laohoo]

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