Nagios Support Forum

Can you point me to documentation that explains how to configure one Nagios XI instance to mirror its information to another? We have multiple sites which monitor their local hosts/services. We would like each Nagios XI instance to report up to a parent instance which displays multiple sites. Thanks.

You might want to look at Nagios Fusion which me designed for exactly what you have described:

http://www.nagios.com/products/nagiosfusion