<tt>ip-multicast-ttl</tt>':
Sets the Time To Live in the IP header for outgoing
multicast datagrams.
Receives a number;</li>
<li> '<tt>ip-add-membership</tt>':
Joins the multicast group specified.
Receives a table with fields
<tt>multiaddr</tt> and <tt>interface</tt>, each containing an
IP address;</li>
<li> '<tt>ip-drop-membership</tt>': Leaves the multicast
group specified.
Receives a table with fields
<tt>multiaddr</tt> and <tt>interface</tt>, each containing an
IP address.</li>
</ul>

<p class="return">