[rsyslog] Remote loggin to 2 rsyslog servers but with "priority"

[Beat Meier]

Hello

I'm pretty new to rsyslog.
I know that you can specifiy 2 server for remote logging which will be 
handled "independent"
i.e. rsyslog will log to the 2 server in parallel.
What I want is a primary rsyslog server and a secondary rsyslog server 
and only if the primary
is not avaiable the secondary should be used. Is this possible with rsyslog?

Thanks for any hints

Beat