anchor.diff:  
    _weight of app_ / _sum of the weights of all apps mapped to route_
   
  -See the following example:
  +See the following example in which two apps are mapped to the same route:
   
   <table>
   	<tr>
  
positive.code: 
  To update an existing route mapping with a new weight, do the following:
  
  1. Get the GUID of the app:
  
  	```
  	cf app APP-NAME --guid
  	```
  
  
  1. Get the GUID of the route:
  	
  	```
  	cf curl /v2/routes?q=host:HOSTNAME
  
negative.code: 	</tr>
  	<tr>
  		<td>app-a</td>
  		<td><code>1</code></td>
  		<td><code>1</code>/(<code>1</code>+<code>3</code>)</td>
  		<td><code>25%</code></td>
  	</tr>
  	<tr>
  		<td>app-b</td>
  		<td><code>3</code></td>
  		<td><code>3</code>/(<code>1</code>+<code>3</code>)</td>
  		<td><code>75%</code></td>
  	</tr>
  </table>
  
  In this example, you can also unmap the route from one of the apps and observe <code>100%</code> of the requests going to just one app, which simulates a migration.
  
  ### <a id="considerations"></a> Considerations for Working with Routing Weights
  
  Consider the following when working with routing weights:
  
  * The default weight is <code>1</code>. This means that if multiple apps are mapped to the same route and their weights are not updated, traffic is equally distributed between them.  
  * The percentage of requests described above is not applied exactly, but over time the requests reflect the percentage.
  * You cannot set a weight to <code>0</code>. You can stop weighting traffic by deleting apps or unmapping apps from the route. 
  * You cannot exceed <code>100</code> routes mappings for a particular route. This could result in some apps not receiving any requests.
  
  
  ## <a id="procedure"></a> Configure Routing Weights
  
  <p class="note"><strong>Note</strong>: This feature does not yet have cf CLI integration. The steps for updating a routing weight require you to <code>curl</code> the Cloud Controller v3 API.</p>
  
  You can configure routing weights when creating or updating a route mapping, Follow the procedure below that corresponds to your use case. 
  
  