---
title: Multicast Pull Outputs
slug: zixi-broadcaster-zec-current-version/multicast-pull-outputs
docTags:
createdAt: 2024-12-26T16:20:46.225Z
---
Multicast Pull Outputs is a collection of multicast IP addresses that automatically assign a multicast IP when an input is being pulled out of the Zixi Broadcaster. When the “multicast pool” setting is enabled, you do not have to define a specific multicast IP address for every push stream. Instead, you simply enable the Multicast Only parameter, and Zixi Broadcaster will assign the multicast IP automatically when it pulls the stream out. When the multicast stream is connected, it will appear in the Status table at the bottom of the screen.
| **Field** | **Description** |
| -------------------------------- | ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |
| **Configuration** | |
| **Allow** | Allows multicast pool |
| **Multicast pool address range** | Specifies the range of IP addresses (CIDR format). |
| **Port** | Specifies the port that will be shared by all of the members of the pool. |
| **NIC** | Specifies the network card to use for the outgoing multicast traffic. |
| **TTL** | Specifies the Time To Live. |
| **Status** | Displays the output usage for active multicast pull streams. Click **Refresh**
to update the displayed table.
The following information is displayed:
* Stream - Name or ID of the stream being pulled.
* IP - Multicast IP address assigned to the stream from the configured address pool.
* Multicast - Number of receivers pulling the stream over multicast.
* Unicast - Number of receivers pulling the stream over unicast, including receivers using unicast fallback. |
## Advanced Mode
The fields discussed below are optional and available only in **Advanced Mode**.
To enter Advanced Mode add the URL parameter `?advanced=1` to the Zixi Broadcaster URL in your browser and press Enter/Return to reload the page:
::Image[]{src="https://api.archbee.com/api/optimize/amUtKWPrNQCS-26DKyGuI-5OBE4QsRN0icABdoD4ciK-20250421-173825.png" size="70" width="800" height="55" position="center" alt="Advanced Mode URL Param" darkWidth="800" darkHeight="55" showCaption="false"}
:::hint{type="info"}
Note the Advanced Mode settings are generally intended for advanced users and special cases. If you do not understand the settings, you should probably accept the default values.
:::
- TOS - Specifies the IP Type of Service (ToS/DSCP) value set on outgoing multicast packets, used by network equipment to prioritize traffic. Range 0-255. Leave it at the default unless the network team gives you a value. If they give you a DSCP class, multiply it by 4. For example, DSCP EF (46) becomes TOS 184, and AF41 (34) becomes 136.
- FEC overhead - Specify the percentage above the source bitrate to apply FEC (default is 30%)
- FEC Block Latency \[ms] - Specify the number of milliseconds that Zixi protects with a single FEC block.