diff --git a/ingress/controllers/nginx/README.md b/ingress/controllers/nginx/README.md
index ac39f4ccd7..0638647cb9 100644
--- a/ingress/controllers/nginx/README.md
+++ b/ingress/controllers/nginx/README.md
@@ -18,6 +18,8 @@ This is a nginx Ingress controller that uses [ConfigMap](https://github.com/kube
 * [Proxy Protocol](#proxy-protocol)
 * [NGINX customization](configuration.md)
 * [NGINX status page](#nginx-status-page)
+* [Running multiple ingress controllers](#running-multiple-ingress-controllers)
+* [Running on Cloudproviders](#running-on-cloudproviders)
 * [Disabling NGINX ingress controller](#disabling-nginx-ingress-controller)
 * [Local cluster](#local-cluster)
 * [Debug & Troubleshooting](#troubleshooting)
@@ -340,6 +342,21 @@ Please check the example `example/rc-default.yaml`
 
 To extract the information in JSON format the module provides a custom URL: `/nginx_status/format/json`
 
+### Running multiple ingress controllers
+
+If you're running multiple ingress controllers, or running on a cloudprovider that natively handles 
+ingress, you need to specify the annotation `kubernetes.io/ingress.class: "nginx"` in all ingresses 
+that you would like this controller to claim. Not specifying the annotation will lead to multiple 
+ingress controllers claiming the same ingress. Specifying the wrong value will result in all ingress 
+controllers ignoring the ingress. Multiple ingress controllers running in the same cluster was not 
+supported in Kubernetes versions < 1.3.
+
+### Running on Cloudproviders
+
+If you're running this ingress controller on a cloudprovider, you should assume the provider also has a native 
+Ingress controller and specify the ingress.class annotation as indicated in this section.
+In addition to this, you will need to add a firewall rule for each port this controller is listening on, i.e :80 and :443.
+
 ### Disabling NGINX ingress controller
 
 Setting the annotation `kubernetes.io/ingress.class` to any value other than "nginx" or the empty string, will force the NGINX Ingress controller to ignore your Ingress. Do this if you wish to use one of the other Ingress controllers at the same time as the NGINX controller.