# PUT: Modify a Router
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Modify the attributes of the specified router. You cannot use this command to modify the inputs or outputs of the router; to do that, use PUT Router Input and PUT Router Output.

## HTTP Request and Response
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### Request URL
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```
PUT http://<Conductor IP address>/routers/<ID of router>
```

### Call Header
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+ Accept: Set to `application/xml`
+ Content-Type: Set to `application/xml`

If you are implementing user authentication, you must also include three authorization headers; see [Header Content for User Authentication](header-content-user.md).

### Request Body
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The request body contains only the elements to change. For a list of available elements, see [POST: Create a Router](set-up-routers-create.md).

## Example
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This request changes the router with the ID 3. It changes its max\_inputs to 8. 

```
PUT http://198.51.100.0/routers/3
------------------------------------------
Content-type:application/vnd.elemental+xml;version=3.3.0
Accept:application/xml
----------------------------------------
<?xml version="1.0" encoding="UTF-8"?>
<router>
  <router_type>blackmagic_videohub</router_type>
  <max_inputs>8</max_inputs>
</router>
```