> **Experimental**
>
> `@aws-cdk/aws-medialive-alpha` is an [**experimental**](/stability) (alpha) package: its API may change in any release, without a major version bump.
# MulticastInputSource

A source for a multicast input.

- Stability: [Experimental](/cdk/api/stability.html)
- Source: [`lib/input.ts`](https://github.com/aws/aws-cdk/blob/v2.275.0-alpha.0/packages/@aws-cdk/aws-medialive-alpha/lib/input.ts#L389)

## Example

```ts
// The code below shows an example of how to instantiate this type.
// The values are placeholders you should change.
import * as medialive_alpha from '@aws-cdk/aws-medialive-alpha';

declare const multicastProtocol: medialive_alpha.MulticastProtocol;
const multicastInputSource: medialive_alpha.MulticastInputSource = {
  address: 'address',
  port: 123,

  // the properties below are optional
  protocol: multicastProtocol,
  sourceIp: 'sourceIp',
};
```

## Properties

- `address`: string (required) — The multicast group address.

- `port`: number (required) — The multicast port.

- `protocol`: [MulticastProtocol](/cdk/api/v2/docs/@aws-cdk_aws-medialive-alpha.MulticastProtocol.html) = MulticastProtocol.UDP — The transport protocol.

- `sourceIp`: string — Filter to a specific source IP (source-specific multicast).

  **Default:** accept any source