---
title: SetMulticastAddresses
framework: networkingdriverkit
role: symbol
role_heading: Instance Method
path: networkingdriverkit/iousernetworkethernet/setmulticastaddresses-7wjbn
---

# SetMulticastAddresses

Sets the device addresses to use for multicast filtering.

## Declaration

```occ
virtual kern_return_t SetMulticastAddresses(const IOUserNetworkMACAddress *addresses, uint32_t count);
```

## Parameters

- `addresses`: An array of MAC addresses for the devices to monitor.
- `count`: The number of items in the addresses parameter.

## Return Value

Return Value kIOReturnSuccess on success, or another value if an error occurred.

## Discussion

Discussion Override this method and use it to set up a Ethernet multicast filter on your device.

## See Also

### Configuring Link Attributes

- [SetTxPacketHeadroom](networkingdriverkit/iousernetworkethernet/settxpacketheadroom.md)
- [SetTxPacketTailroom](networkingdriverkit/iousernetworkethernet/settxpackettailroom.md)
- [SetSoftwareVlanSupport](networkingdriverkit/iousernetworkethernet/setsoftwarevlansupport.md)
- [SetAllMulticastModeEnable](networkingdriverkit/iousernetworkethernet/setallmulticastmodeenable-5rtva.md)
- [SetPromiscuousModeEnable](networkingdriverkit/iousernetworkethernet/setpromiscuousmodeenable-82bt.md)
- [SetWakeOnMagicPacketSupport](networkingdriverkit/iousernetworkethernet/setwakeonmagicpacketsupport.md)
- [SetWakeOnMagicPacketEnable](networkingdriverkit/iousernetworkethernet/setwakeonmagicpacketenable.md)
- [IOUserNetworkMACAddress](networkingdriverkit/iousernetworkmacaddress.md)