diff --git a/src/Makefile.am b/src/Makefile.am
index f4bf64c4..967fea4a 100644
--- a/src/Makefile.am
+++ b/src/Makefile.am
@@ -140,6 +140,8 @@ utun_CORE_SOURCES = \
 	proxy/proxy_protocol.h \
 	proxy/tcp_proxy_client.c \
 	routing_layer/etcp_router.c \
+	routing_layer/multicast.c \
+	routing_layer/multicast.h \
 	routing_layer/route_tx_stats.c \
 	routing_layer/route_tx_stats.h \
 	routing_layer/route_crypto.c \
@@ -326,6 +328,8 @@ libutun_a_SOURCES = \
 	proxy/proxy_protocol.h \
 	proxy/tcp_proxy_client.c \
 	routing_layer/etcp_router.c \
+	routing_layer/multicast.c \
+	routing_layer/multicast.h \
 	routing_layer/route_tx_stats.c \
 	routing_layer/route_tx_stats.h \
 	routing_layer/route_crypto.c \
diff --git a/src/routing_layer/topo_group.c b/src/routing_layer/topo_group.c
index d2a265fa..a3d93665 100644
--- a/src/routing_layer/topo_group.c
+++ b/src/routing_layer/topo_group.c
@@ -28,6 +28,7 @@
 #include "topo_group_connect.h"
 #include "topo_recovery.h"
 #include "broadcast.h"
+#include "multicast.h"
 #include "../radio/radio.h"
 #include "../stream/stream.h"
 #include "../chat/chat_setting.h"
@@ -626,6 +627,7 @@ static struct TOPO_GROUP* topo_group_create(struct UTUN_INSTANCE* instance, uint
 static void topo_group_destroy(struct TOPO_GROUP* group) {
     if (!group) return;
     group->stopping = 1;
+    multicast_close_group(group->instance, group->group_id);
     nat_detection_cancel_group(group->instance->nat_det, group->group_id);
     stream_cancel_group(group->instance, group->group_id);
     DEBUG_INFO(DEBUG_CATEGORY_SYS, "[GRP_DESTROY] 0 enter grp=%p id=0x%016llx rec_list=%p connect=%p",
@@ -1202,6 +1204,7 @@ static void topo_group_routes_changed(struct TOPO_GROUP* group, struct TOPO_GROU
     topo_group_publish_route(group, id);
     topo_recovery_changed(group);
     conn_mgr_routes_changed(group->conn_mgr);
+    multicast_routes_changed(group->instance);
 }
 
 /* TABLE_COMPLETE подтверждает только NODEINFO текущего обмена. Сбой обмена