# Use case: Using SDI router input in a profile and channel
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You might want to specify an SDI router input in your profile and channel. This type of input goes through a router, and is only applicable if there is at least one node in the cluster that is configured with a router. When you choose this type of input, a supplementary field appears—the **Router Input ID** field. 

The **Router Input ID** field must be set up as a channel parameter. You can't enter a real ID. 

To set up this field, follow this procedure. This procedure assumes that you have already read [Working with channel parameters in a profile](creating-a-profile-with-channel-parameters.md).

1. When you create the profile, complete the following fields in this way:
   + **Input Type**: Choose **SDI Router Input**.
   + **Router Input ID**: For the value, create a channel parameter as described in the section [Working with channel parameters in a profile](creating-a-profile-with-channel-parameters.md).

     Assign any name, but do not create a name consisting only of a number. For example, create a channel parameter with the name **SDI\_router\_ID**.

     In the **Parameters** panel, enter a validation value.

1. When you create the channel, complete the following fields in this way:
   + **Node**: Choose a node that has an SDI router attached to it.
   + **SDI Router Input Router Input ID**: Note that the field name appears with this label. It doesn't appear with the label **Router Input ID**. 

     From the list, choose one of the inputs on the router. This router is attached to the node that you chose.