---
title: Dual PULL Transmission from Single Source (Warm Redundancy)
slug: product-features/dual-pull-transmission-from-single-source-warm-redundancy
docTags: 
createdAt: 2024-12-08T18:42:58.287Z
---

![](https://api.archbee.com/api/optimize/mzxtTQEvCNIdUNgF2kuwJ/N6QDBPoulo3vxjdUU3rPX-20260216-105442.png)

Zixi can be deployed to pull a stream to redundant targets. This topology shows a stream that is pulled from a single source node to a corresponding pair of redundant targets in a warm redundancy configuration. The stream is not pulled in parallel, only when the Main Zixi Receiver fails, the Backup Zixi Receiver will be able to pull the stream from the Zixi Broadcaster.

A single Input is created at the source Zixi Broadcaster, which includes a **Max Outputs** limitation of 1 output. The same Pull input is created in both the Main ZEC and Backup ZEC. In runtime, the ZEC will connect to the Zixi Broadcaster and the output is created automatically "on the fly". If the Main Zixi Receiver becomes unavailable, the Zixi Broadcaster will grant the Backup ZEC with the permission to pull the stream. However, when the main ZEC becomes available again, Zixi Broadcaster will not grant a permission to pull the stream again (due to the max outputs limitation) until the Backup Zixi Receiver stops pulling the stream. 

## Source Configuration

**To configure the source node (e.g. Zixi Broadcaster):**

1. On the **Inputs** page of the primary Zixi Broadcaster, click **New Input** on the upper- right end corner of the screen.
2. In the **Stream ID** field, type a new name for the input stream. 
3. Select the **a relevant connection type** option.
4. In the **Max Outputs** field, type "1".
5. Specify the stream parameters according to the relevant connection type selected. 
6. Click **OK **to create the primary input.

## Target Configuration

A Pull input should be configured in the primary and backup target nodes.

**To configure the primary target node (e.g. ZEC):**

1. Click the **Inputs **tab at the top of the ZEC administrative screen.
2. Click **New Input **on the upper right hand side of the screen.
3. In the **Input Name** field, type a new name for the input. 
4. Select the **Pull **option.
5. In the **Remote Host** field, enter the host name or IP of the Primary Broadcaster source. 
6. In the **Remote Port** field, enter the connection port of the source host (primary Zixi Broadcaster). Default: 2077. 
7. In the **Remote Stream** **ID** field, enter the stream ID used in the Primary Broadcaster source output. 
8. Configure additional parameters as required. 
9. Click **OK**.

**To configure the secondary target node (e.g. ZEC):**

- Repeat the same configuration steps as the ones in the primary target node. Make sure you use the same input name used in the primary target node.

## Cost Considerations

This topology duplicates the source Zixi hardware and software components. It does not require doubling the uplink bandwidth as the backup connection stream is only active in the event that the primary fails. 

## Latency Considerations

For detailed recovery time details, please contact your Zixi representative.