---
title: Dual PULL Transmission from Redundant Sources (Hot Redundancy)
slug: product-features/dual-pull-transmission-from-redundant-sources-hot-redundancy
docTags: 
createdAt: 2024-12-08T18:40:36.261Z
---

![](https://api.archbee.com/api/optimize/mzxtTQEvCNIdUNgF2kuwJ/CYJNZT4PQF9aNRzKdHdtW-20260216-143935.png)

Zixi can be deployed to pull parallel redundant sources to two targets. This topology includes two simultaneous streams pulled in parallel from two separate source nodes to a corresponding pair of redundant targets. The streams are pulled in parallel by the two redundant targets, creating two redundant paths to the destination. If a component in one of the paths fails, the alternative path can be used by the IRD. 

Two distinctly named inputs are created at the source Zixi Broadcasters. Each ZEC will be configured to Pull the stream from each of the Zixi Broadcasters. If the latency of the Inputs is identical, the streams will be frame synced providing they video is synced at the source.

## Source Configuration

Configuring in advance the Pull output in the primary and secondary Broadcasters is not mandatory. 

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

1. On the **Inputs** page of the primary Zixi Broadcaster, click **New Input** on the upper-right 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, do one of the following:
   1. Leave it as Unlimited.
   2. Specify the maximal number of connections (e.g. type "1" to enable a single Pull connection).
5. Specify the stream parameters according to the relevant connection type selected. 
6. Click **OK **to create the primary input.

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

1. On the **Inputs** page of the primary Zixi Broadcaster, click **New Input** on the upper-right 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, do one of the following:
   1. Leave it as Unlimited.
   2. Specify the maximal number of connections (e.g. type "1" to enable a single Pull connection).
5. Specify the stream parameters according to the relevant connection type selected. 
6. Click **OK **to create the primary input.

## Target Configuration

**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. Select the **Pull **option.
4. In the **Remote Host** field, enter the name of the primary source host Zixi Broadcaster. 
5. In the **Remote** **Port** field, enter the port number as configured in the primary Zixi Broadcaster. 
6. In the **Remote** **Stream** **ID** field, enter the stream ID as configured in the primary Zixi Broadcaster.
7. Configure additional parameters as required. 
8. Click **OK**.



**To configure the secondary 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. Select the **Pull **option.
4. In the **Remote Host** field, enter the name of the secondary source host Zixi Broadcaster. 
5. In the **Remote Port** field, enter the port number as configured in the secondary Zixi Broadcaster. 
6. In the **Remote stream ID** field, enter the stream ID as configured in the secondary Zixi Broadcaster.
7. Configure additional parameters as required. 
8. Click **OK**.

## Cost Considerations

This topology duplicates the hardware and software components of both the source and the target. The configuration also requires using double the up-link bandwidth. Allocation of twice the expected maximum bit-rate with head room is advised.

## Latency Considerations

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