rfair404

This plugin makes it possible to have a menu that is controlled by the primary site but used throughout all other sites in the network.
<ul>
<li>When a navigation menu position has no menu assigned, the “fallback” defaults to pages. This plugin over-rides that so that instead it uses the nav menu from the “main site” (site ID 1)</li>
</ul>

Network Menu Fallback

Gives multisite administrators the ability to create menus that can be used throughout a network.

Samer Bechara

Have you ever wanted to duplicate your menus across multiple websites on your wordpress network, and decided that it was too hard to do manually?
This is what this plugin helps you exactly achieve in a matter of clicks.

Network Menu Copier

This plugin allows you to bulk copy your menus between sites on your network which are using the same theme.

Network Menu Fallback vs Network Menu Copier