Show pager dots on ion-slides ionic component

Finally got it to work with this as the opening tag of the slides:

<ion-slides [options]="{pagination: true}">

This work for me in Ionic 3:

<ion-content>

  <ion-slides pager>
    <ion-slide>
      <h1>My Slide 1</h1>
    </ion-slide>
    <ion-slide> 
      <h1>My Slide 2</h1>
    </ion-slide>
    <ion-slide>
      <h1>My Slide 3</h1>
    </ion-slide>
  </ion-slides>

</ion-content>