My guess it is for nxapi API.

On Friday, March 25, 2016 at 6:41:02 PM UTC-7, Roger Gomez wrote:
>
> Normally when we use regular plays, we define a group of hosts and all the 
> tasks in the playbook are executed in the list of hosts defined. For the 
> case of the Cisco modules we need an additional host inside each module 
> declaration for the tasks:
> ---
> - hosts:
>   - some_host
>   gather_facts: no
>   tasks:
>   - nxos_command:
>      username: ansible
>      commands:
>      - show ip route
>      transport: cli
>      use_ssl: no
>      host: some_host
>
>
> I would like to understand why we need this extra-declaration of host (I 
> already understand that was written like that :) ) and if there is a way 
> that we can use this modules to behave like any other modules we use in 
> linux where we only need to declare a host once.
> Thanks.
>

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