diff --git a/repos/os/include/net/ipv4.h b/repos/os/include/net/ipv4.h
index 41380a4e1d..3327bf9962 100644
--- a/repos/os/include/net/ipv4.h
+++ b/repos/os/include/net/ipv4.h
@@ -56,6 +56,8 @@ struct Net::Ipv4_address : Network_address<IPV4_ADDR_LEN, '.', false>
 
 	bool is_in_range(Ipv4_address const &first,
 	                 Ipv4_address const &last) const;
+
+	bool is_multicast() const;
 }
 __attribute__((packed));
 
diff --git a/repos/os/src/lib/net/ipv4.cc b/repos/os/src/lib/net/ipv4.cc
index cc33996343..3e256e9c12 100644
--- a/repos/os/src/lib/net/ipv4.cc
+++ b/repos/os/src/lib/net/ipv4.cc
@@ -41,6 +41,12 @@ void Net::Ipv4_packet::print(Genode::Output &output) const
 }
 
 
+bool Ipv4_address::is_multicast() const
+{
+	return (addr[0] & 0xf0) == 0b11100000;
+}
+
+
 bool Ipv4_address::is_in_range(Ipv4_address const &first,
                                Ipv4_address const &last) const
 {
diff --git a/repos/os/src/server/nic_router/interface.cc b/repos/os/src/server/nic_router/interface.cc
index 77df57ff0d..25b74247af 100644
--- a/repos/os/src/server/nic_router/interface.cc
+++ b/repos/os/src/server/nic_router/interface.cc
@@ -1391,9 +1391,21 @@ void Interface::_handle_ip(Ethernet_frame          &eth,
 		return;
 	}
 
-	/* give up and drop packet */
-	_send_icmp_dst_unreachable(local_intf, eth, ip,
-	                           Icmp_packet::Code::DST_NET_UNREACHABLE);
+	/*
+	 * Give up and drop packet. According to RFC 1812 section 4.3.2.7, an ICMP
+	 * "Destination Unreachable" is sent as response only if the dropped
+	 * packet fullfills certain properties.
+	 *
+	 * FIXME
+	 *
+	 * There are some properties required by the RFC that are not yet checked
+	 * at this point.
+	 */
+	if(not ip.dst().is_multicast()) {
+
+		_send_icmp_dst_unreachable(local_intf, eth, ip,
+		                           Icmp_packet::Code::DST_NET_UNREACHABLE);
+	}
 	if (_config().verbose()) {
 		log("[", local_domain, "] unroutable packet"); }
 }