---
title: Dual NIC PULL Redundancy (Warm Redundancy)
slug: product-features/dual-nic-pull-redundancy-warm-redundancy
docTags: 
createdAt: 2024-12-08T19:01:15.814Z
---

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A Zixi PULL input should be configured, which pulls the stream from a single source with two redundant NICs. In the event that the primary NIC becomes unavailable, the target node will automatically switch to the secondary NIC. The target node will attempt to pull from the primary NIC again only in the event that the secondary NIC becomes unavailable. 

The input in the source is configured as usual and can use any available connection types (Push, Pull, UDP, etc.). On the target Zixi Receiver you will configure one Pull input. This input is connected to the Broadcaster and includes an Alternative Host, which is the IP of the secondary NIC. In run-time, the Zixi Receiver will connect to the primary NIC in the Zixi Broadcaster and the output will be created automatically "on the fly". If the primary source becomes unavailable the target will attempt to pull the same stream with the same stream ID from the secondary NIC (which has been defined as the Alternative Host).

## Source Configuration

Configure an input, as described below. Configuring in advance the Pull output in the Broadcaster is not mandatory.

**To configure the 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. Specify the stream parameters according to the relevant connection type selected. 
5. Click **OK **to create the primary input.

## Target Configuration

**To configure the target node (e.g. Zixi Receiver):**

1. Click the **Inputs **tab at the top of the Zixi Receiver 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 **Host** field, enter the IP of the Primary NIC. 
6. Click the **"+"** button to add an Alternative Host. 
7. In the** Alt. Host** field, enter the IP of the Secondary NIC. 
8. In the **Port** field, enter the connection port of the host (Zixi Receiver). Default: 2077. 
9. In the **Stream** field, enter the stream ID used as configured in the source. 
   The output is created "on the fly" on the Zixi Broadcaster, so there is no need to configure it. 
10. Configure additional parameters as required. 
11. Click **OK**.

## Cost Considerations

This topology duplicates the network link. Allocation of the expected maximum bitrate with head room is advised on each network path.

## Latency Considerations

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