Does navmesh play nice with Rigidbodies / Colliders?

I'm developing some basic AI. I want my enemy to patrol randomly, get aggro, and be pushed by certain other GameObjects.

The navmesh was an easy solution for the patrolling, however it seems to override collisions like a bullet forcing the GameObject back.

For aggro, should I just make a child gameobject with a collider component and give that its own OnTriggerEnter? Or is there a better way to achieve this?