# Method Stdio.UDP()->enable_multicast()

Method enable_multicast

  `bool enable_multicast(string reply_address)`

Description

  Set the local device for a multicast socket.

Parameter `reply_address`

  Local address that should appear in the multicast packets.

  See also the Unix man page for setsocketopt IPPROTO_IP IP_MULTICAST_IF and IPPROTO_IPV6 IPV6_MULTICAST_IF.

Note

  This function did not support IPv6 in Pike 7.8.