Upgrade Cisco IOS ASR 1001-X

[phil.g.james]

Hi we have a requirement to upgrade a Cisco ASR1001-X router from version IOS15.5(3)S5 IOS XE 03.16.05 to asr1001x-universalk9.17.06.04.SPA.bin

Can we upgrade directly to this version or will be have to implement an intermediate version in-between the two?

[M02@rt37]

Hello @phil.g.james,

check your ROMMON version and see if an upgrade of it is necessary

https://www.cisco.com/c/en/us/td/docs/routers/asr1000/rommon/asr1000-rommon-upg-guide.html

[Leo Laohoo]

Direct upgrade is supported as long as the ROMMON is upgraded first.

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

[c.carrion]

Hi Leo,

The version 17.x (ASR1001-X) support upgrade via bundle mode?

I want to upgrade from 16.9.5 to 17.9 via bundle mode , is it possible ?

Regards

[Leo Laohoo]

Bundle Mode upgrade, from 16.9.X, to 17.9.X is supported as long as the ROMMON gets upgraded first.  

NOTE:  
Some people may state that the ROMMON will get "automatically" upgraded, I would not risk it because I've already seen in 17.12.X where the ROMMON did not get "automatically" upgraded to 17.7.1r and the router went into a boot-crash-loop as a consequence of this "undocumented feature".

[SamithMadhukalpa5866]

Hi Leo,

Could you please provide the detailed steps/commands for the Bundle Mode upgrade, from 16.9.4, to 17.9.5a ?

[Leo Laohoo]

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@SamithMadhukalpa5866 wrote:
Could you please provide the detailed steps/commands for the Bundle Mode upgrade, from 16.9.4, to 17.9.5a ?

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Use Install Mode instead.  

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

[kakashiHatake]

Hi @Leo Laohoo ,

Can we upgrade directly from bundle mode to install mode by simply following the install mode upgrade steps, or is there a specific method we need to follow?

[Leo Laohoo]

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@kakashiHatake wrote:

Hi @Leo Laohoo ,

Can we upgrade directly from bundle mode to install mode by simply following the install mode upgrade steps, or is there a specific method we need to follow?

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Follow the guide I have posted to upgrade from Bundle Mode to Install Mode.

NOTE: 
Do not conduct a direct upgrade from 17.3.X (and earlier) to 17.12.X (and later) because the router may go into a boot-crash-loop.  Upgrade first to an intermediate version, like 17.6.X or 17.9.X, before making the upgrading to 17.12.X (and later).