diff --git a/app/src/app_base.h b/app/src/app_base.h
index 30bbc963c..9ce3fdddd 100644
--- a/app/src/app_base.h
+++ b/app/src/app_base.h
@@ -548,7 +548,8 @@ struct st_app_context {
   struct st_app_tx_st20p_session* tx_st20p_sessions;
   int tx_st20p_session_cnt;
 
-  uint8_t rx_sip_addr[MTL_PORT_MAX][MTL_IP_ADDR_LEN]; /* rx source IP */
+  uint8_t rx_sip_addr[MTL_PORT_MAX][MTL_IP_ADDR_LEN];       /* rx source IP */
+  uint8_t rx_mcast_sip_addr[MTL_PORT_MAX][MTL_IP_ADDR_LEN]; /* rx multicast source IP */
 
   struct st_app_rx_video_session* rx_video_sessions;
   int rx_video_session_cnt;
diff --git a/app/src/args.c b/app/src/args.c
index 50efa8a74..e72566335 100644
--- a/app/src/args.c
+++ b/app/src/args.c
@@ -24,6 +24,8 @@ enum st_args_cmd {
   ST_ARG_R_NETMASK,
   ST_ARG_P_GATEWAY,
   ST_ARG_R_GATEWAY,
+  ST_ARG_P_RX_MCAST_SIP,
+  ST_ARG_R_RX_MCAST_SIP,
 
   ST_ARG_TX_VIDEO_URL = 0x200,
   ST_ARG_TX_VIDEO_SESSIONS_CNT,
@@ -143,6 +145,8 @@ static struct option st_app_args_options[] = {
     {"r_netmask", required_argument, 0, ST_ARG_R_NETMASK},
     {"p_gateway", required_argument, 0, ST_ARG_P_GATEWAY},
     {"r_gateway", required_argument, 0, ST_ARG_R_GATEWAY},
+    {"p_rx_mcast_sip", required_argument, 0, ST_ARG_P_RX_MCAST_SIP},
+    {"r_rx_mcast_sip", required_argument, 0, ST_ARG_R_RX_MCAST_SIP},
 
     {"tx_video_url", required_argument, 0, ST_ARG_TX_VIDEO_URL},
     {"tx_video_sessions_count", required_argument, 0, ST_ARG_TX_VIDEO_SESSIONS_CNT},
@@ -397,6 +401,12 @@ int st_app_parse_args(struct st_app_context* ctx, struct mtl_init_params* p, int
       case ST_ARG_R_GATEWAY:
         inet_pton(AF_INET, optarg, p->gateway[MTL_PORT_R]);
         break;
+      case ST_ARG_P_RX_MCAST_SIP:
+        inet_pton(AF_INET, optarg, ctx->rx_mcast_sip_addr[MTL_PORT_P]);
+        break;
+      case ST_ARG_R_RX_MCAST_SIP:
+        inet_pton(AF_INET, optarg, ctx->rx_mcast_sip_addr[MTL_PORT_R]);
+        break;
       case ST_ARG_TX_VIDEO_URL:
         snprintf(ctx->tx_video_url, sizeof(ctx->tx_video_url), "%s", optarg);
         break;
diff --git a/app/src/rx_ancillary_app.c b/app/src/rx_ancillary_app.c
index 1b6daeed4..c03fd1f3a 100644
--- a/app/src/rx_ancillary_app.c
+++ b/app/src/rx_ancillary_app.c
@@ -130,6 +130,9 @@ static int app_rx_anc_init(struct st_app_context* ctx, st_json_ancillary_session
          anc ? st_json_ip(ctx, &anc->base, MTL_SESSION_PORT_P)
              : ctx->rx_sip_addr[MTL_PORT_P],
          MTL_IP_ADDR_LEN);
+  memcpy(ops.mcast_sip_addr[MTL_SESSION_PORT_P],
+         anc ? anc->base.mcast_src_ip[MTL_PORT_P] : ctx->rx_mcast_sip_addr[MTL_PORT_P],
+         MTL_IP_ADDR_LEN);
   snprintf(ops.port[MTL_SESSION_PORT_P], MTL_PORT_MAX_LEN, "%s",
            anc ? anc->base.inf[MTL_SESSION_PORT_P]->name : ctx->para.port[MTL_PORT_P]);
   ops.udp_port[MTL_SESSION_PORT_P] = anc ? anc->base.udp_port : (10200 + s->idx);
@@ -138,6 +141,9 @@ static int app_rx_anc_init(struct st_app_context* ctx, st_json_ancillary_session
            anc ? st_json_ip(ctx, &anc->base, MTL_SESSION_PORT_R)
                : ctx->rx_sip_addr[MTL_PORT_R],
            MTL_IP_ADDR_LEN);
+    memcpy(ops.mcast_sip_addr[MTL_SESSION_PORT_R],
+           anc ? anc->base.mcast_src_ip[MTL_PORT_R] : ctx->rx_mcast_sip_addr[MTL_PORT_R],
+           MTL_IP_ADDR_LEN);
     snprintf(ops.port[MTL_SESSION_PORT_R], MTL_PORT_MAX_LEN, "%s",
              anc ? anc->base.inf[MTL_SESSION_PORT_R]->name : ctx->para.port[MTL_PORT_R]);
     ops.udp_port[MTL_SESSION_PORT_R] = anc ? anc->base.udp_port : (10200 + s->idx);
diff --git a/app/src/rx_audio_app.c b/app/src/rx_audio_app.c
index 9e7366662..1d1e5fd35 100644
--- a/app/src/rx_audio_app.c
+++ b/app/src/rx_audio_app.c
@@ -231,6 +231,10 @@ static int app_rx_audio_init(struct st_app_context* ctx, st_json_audio_session_t
          audio ? st_json_ip(ctx, &audio->base, MTL_SESSION_PORT_P)
                : ctx->rx_sip_addr[MTL_PORT_P],
          MTL_IP_ADDR_LEN);
+  memcpy(
+      ops.mcast_sip_addr[MTL_SESSION_PORT_P],
+      audio ? audio->base.mcast_src_ip[MTL_PORT_P] : ctx->rx_mcast_sip_addr[MTL_PORT_P],
+      MTL_IP_ADDR_LEN);
   snprintf(
       ops.port[MTL_SESSION_PORT_P], MTL_PORT_MAX_LEN, "%s",
       audio ? audio->base.inf[MTL_SESSION_PORT_P]->name : ctx->para.port[MTL_PORT_P]);
@@ -240,6 +244,10 @@ static int app_rx_audio_init(struct st_app_context* ctx, st_json_audio_session_t
            audio ? st_json_ip(ctx, &audio->base, MTL_SESSION_PORT_R)
                  : ctx->rx_sip_addr[MTL_PORT_R],
            MTL_IP_ADDR_LEN);
+    memcpy(
+        ops.mcast_sip_addr[MTL_SESSION_PORT_R],
+        audio ? audio->base.mcast_src_ip[MTL_PORT_R] : ctx->rx_mcast_sip_addr[MTL_PORT_R],
+        MTL_IP_ADDR_LEN);
     snprintf(ops.port[MTL_SESSION_PORT_R], MTL_PORT_MAX_LEN, "%s",
              audio ? audio->base.inf[MTL_PORT_R]->name : ctx->para.port[MTL_PORT_R]);
     ops.udp_port[MTL_SESSION_PORT_R] = audio ? audio->base.udp_port : (10100 + s->idx);
diff --git a/app/src/rx_st20p_app.c b/app/src/rx_st20p_app.c
index 415cacc4e..400403901 100644
--- a/app/src/rx_st20p_app.c
+++ b/app/src/rx_st20p_app.c
@@ -199,6 +199,10 @@ static int app_rx_st20p_init(struct st_app_context* ctx,
          st20p ? st_json_ip(ctx, &st20p->base, MTL_SESSION_PORT_P)
                : ctx->rx_sip_addr[MTL_PORT_P],
          MTL_IP_ADDR_LEN);
+  memcpy(
+      ops.mcast_sip_addr[MTL_SESSION_PORT_P],
+      st20p ? st20p->base.mcast_src_ip[MTL_PORT_P] : ctx->rx_mcast_sip_addr[MTL_PORT_P],
+      MTL_IP_ADDR_LEN);
   snprintf(
       ops.port.port[MTL_SESSION_PORT_P], MTL_PORT_MAX_LEN, "%s",
       st20p ? st20p->base.inf[MTL_SESSION_PORT_P]->name : ctx->para.port[MTL_PORT_P]);
@@ -208,6 +212,10 @@ static int app_rx_st20p_init(struct st_app_context* ctx,
            st20p ? st_json_ip(ctx, &st20p->base, MTL_SESSION_PORT_R)
                  : ctx->rx_sip_addr[MTL_PORT_R],
            MTL_IP_ADDR_LEN);
+    memcpy(
+        ops.mcast_sip_addr[MTL_SESSION_PORT_R],
+        st20p ? st20p->base.mcast_src_ip[MTL_PORT_R] : ctx->rx_mcast_sip_addr[MTL_PORT_R],
+        MTL_IP_ADDR_LEN);
     snprintf(
         ops.port.port[MTL_SESSION_PORT_R], MTL_PORT_MAX_LEN, "%s",
         st20p ? st20p->base.inf[MTL_SESSION_PORT_R]->name : ctx->para.port[MTL_PORT_R]);
diff --git a/app/src/rx_st20r_app.c b/app/src/rx_st20r_app.c
index a2d551110..c5cc76fa0 100644
--- a/app/src/rx_st20r_app.c
+++ b/app/src/rx_st20r_app.c
@@ -259,6 +259,10 @@ static int app_rx_st20r_init(struct st_app_context* ctx, st_json_video_session_t
          video ? st_json_ip(ctx, &video->base, MTL_SESSION_PORT_P)
                : ctx->rx_sip_addr[MTL_PORT_P],
          MTL_IP_ADDR_LEN);
+  memcpy(
+      ops.mcast_sip_addr[MTL_SESSION_PORT_P],
+      video ? video->base.mcast_src_ip[MTL_PORT_P] : ctx->rx_mcast_sip_addr[MTL_PORT_P],
+      MTL_IP_ADDR_LEN);
   snprintf(ops.port[MTL_SESSION_PORT_P], MTL_PORT_MAX_LEN, "%s",
            video ? video->base.inf[MTL_PORT_P]->name : ctx->para.port[MTL_PORT_P]);
   ops.udp_port[MTL_SESSION_PORT_P] = video ? video->base.udp_port : (10000 + s->idx);
@@ -267,6 +271,10 @@ static int app_rx_st20r_init(struct st_app_context* ctx, st_json_video_session_t
            video ? st_json_ip(ctx, &video->base, MTL_SESSION_PORT_R)
                  : ctx->rx_sip_addr[MTL_PORT_R],
            MTL_IP_ADDR_LEN);
+    memcpy(
+        ops.mcast_sip_addr[MTL_SESSION_PORT_R],
+        video ? video->base.mcast_src_ip[MTL_PORT_R] : ctx->rx_mcast_sip_addr[MTL_PORT_R],
+        MTL_IP_ADDR_LEN);
     snprintf(
         ops.port[MTL_SESSION_PORT_R], MTL_PORT_MAX_LEN, "%s",
         video ? video->base.inf[MTL_SESSION_PORT_R]->name : ctx->para.port[MTL_PORT_R]);
diff --git a/app/src/rx_st22_app.c b/app/src/rx_st22_app.c
index 963415e2e..97f9c4a95 100644
--- a/app/src/rx_st22_app.c
+++ b/app/src/rx_st22_app.c
@@ -192,12 +192,16 @@ static int app_rx_st22_init(struct st_app_context* ctx, struct st22_app_rx_sessi
   ops.priv = s;
   ops.num_port = ctx->para.num_ports;
   memcpy(ops.sip_addr[MTL_SESSION_PORT_P], ctx->rx_sip_addr[MTL_PORT_P], MTL_IP_ADDR_LEN);
+  memcpy(ops.mcast_sip_addr[MTL_SESSION_PORT_P], ctx->rx_mcast_sip_addr[MTL_PORT_P],
+         MTL_IP_ADDR_LEN);
   snprintf(ops.port[MTL_SESSION_PORT_P], MTL_PORT_MAX_LEN, "%s",
            ctx->para.port[MTL_PORT_P]);
   ops.udp_port[MTL_SESSION_PORT_P] = 15000 + s->idx;
   if (ops.num_port > 1) {
     memcpy(ops.sip_addr[MTL_SESSION_PORT_R], ctx->rx_sip_addr[MTL_PORT_R],
            MTL_IP_ADDR_LEN);
+    memcpy(ops.mcast_sip_addr[MTL_SESSION_PORT_R], ctx->rx_mcast_sip_addr[MTL_PORT_R],
+           MTL_IP_ADDR_LEN);
     snprintf(ops.port[MTL_SESSION_PORT_R], MTL_PORT_MAX_LEN, "%s",
              ctx->para.port[MTL_PORT_R]);
     ops.udp_port[MTL_SESSION_PORT_R] = 15000 + s->idx;
diff --git a/app/src/rx_st22p_app.c b/app/src/rx_st22p_app.c
index 88dbe4e17..fd3f33590 100644
--- a/app/src/rx_st22p_app.c
+++ b/app/src/rx_st22p_app.c
@@ -144,6 +144,10 @@ static int app_rx_st22p_init(struct st_app_context* ctx,
          st22p ? st_json_ip(ctx, &st22p->base, MTL_SESSION_PORT_P)
                : ctx->rx_sip_addr[MTL_PORT_P],
          MTL_IP_ADDR_LEN);
+  memcpy(
+      ops.mcast_sip_addr[MTL_SESSION_PORT_P],
+      st22p ? st22p->base.mcast_src_ip[MTL_PORT_P] : ctx->rx_mcast_sip_addr[MTL_PORT_P],
+      MTL_IP_ADDR_LEN);
   snprintf(
       ops.port.port[MTL_SESSION_PORT_P], MTL_PORT_MAX_LEN, "%s",
       st22p ? st22p->base.inf[MTL_SESSION_PORT_P]->name : ctx->para.port[MTL_PORT_P]);
@@ -153,6 +157,10 @@ static int app_rx_st22p_init(struct st_app_context* ctx,
            st22p ? st_json_ip(ctx, &st22p->base, MTL_SESSION_PORT_R)
                  : ctx->rx_sip_addr[MTL_PORT_R],
            MTL_IP_ADDR_LEN);
+    memcpy(
+        ops.mcast_sip_addr[MTL_SESSION_PORT_R],
+        st22p ? st22p->base.mcast_src_ip[MTL_PORT_R] : ctx->rx_mcast_sip_addr[MTL_PORT_R],
+        MTL_IP_ADDR_LEN);
     snprintf(
         ops.port.port[MTL_SESSION_PORT_R], MTL_PORT_MAX_LEN, "%s",
         st22p ? st22p->base.inf[MTL_SESSION_PORT_R]->name : ctx->para.port[MTL_PORT_R]);
diff --git a/app/src/rx_video_app.c b/app/src/rx_video_app.c
index 9a8844ab0..6bee129ba 100644
--- a/app/src/rx_video_app.c
+++ b/app/src/rx_video_app.c
@@ -502,6 +502,10 @@ static int app_rx_video_init(struct st_app_context* ctx, st_json_video_session_t
          video ? st_json_ip(ctx, &video->base, MTL_SESSION_PORT_P)
                : ctx->rx_sip_addr[MTL_PORT_P],
          MTL_IP_ADDR_LEN);
+  memcpy(
+      ops.mcast_sip_addr[MTL_SESSION_PORT_P],
+      video ? video->base.mcast_src_ip[MTL_PORT_P] : ctx->rx_mcast_sip_addr[MTL_PORT_P],
+      MTL_IP_ADDR_LEN);
   snprintf(
       ops.port[MTL_SESSION_PORT_P], MTL_PORT_MAX_LEN, "%s",
       video ? video->base.inf[MTL_SESSION_PORT_P]->name : ctx->para.port[MTL_PORT_P]);
@@ -511,6 +515,10 @@ static int app_rx_video_init(struct st_app_context* ctx, st_json_video_session_t
            video ? st_json_ip(ctx, &video->base, MTL_SESSION_PORT_R)
                  : ctx->rx_sip_addr[MTL_PORT_R],
            MTL_IP_ADDR_LEN);
+    memcpy(
+        ops.mcast_sip_addr[MTL_SESSION_PORT_R],
+        video ? video->base.mcast_src_ip[MTL_PORT_R] : ctx->rx_mcast_sip_addr[MTL_PORT_R],
+        MTL_IP_ADDR_LEN);
     snprintf(
         ops.port[MTL_SESSION_PORT_R], MTL_PORT_MAX_LEN, "%s",
         video ? video->base.inf[MTL_SESSION_PORT_R]->name : ctx->para.port[MTL_PORT_R]);
diff --git a/lib/src/st2110/st_rx_ancillary_session.c b/lib/src/st2110/st_rx_ancillary_session.c
index 27b800008..e1c76b1a1 100644
--- a/lib/src/st2110/st_rx_ancillary_session.c
+++ b/lib/src/st2110/st_rx_ancillary_session.c
@@ -277,7 +277,8 @@ static int rx_ancillary_session_init_mcast(struct mtl_main_impl* impl,
       info("%s(%d), skip mcast join for port %d\n", __func__, s->idx, i);
       return 0;
     }
-    ret = mt_mcast_join(impl, mt_ip_to_u32(ops->sip_addr[i]), 0,
+    ret = mt_mcast_join(impl, mt_ip_to_u32(ops->sip_addr[i]),
+                        mt_ip_to_u32(ops->mcast_sip_addr[i]),
                         mt_port_logic2phy(s->port_maps, i));
     if (ret < 0) return ret;
   }
diff --git a/lib/src/st2110/st_rx_audio_session.c b/lib/src/st2110/st_rx_audio_session.c
index 2439456e2..8a3070f9e 100644
--- a/lib/src/st2110/st_rx_audio_session.c
+++ b/lib/src/st2110/st_rx_audio_session.c
@@ -678,7 +678,8 @@ static int rx_audio_session_init_mcast(struct mtl_main_impl* impl,
       info("%s(%d), skip mcast join for port %d\n", __func__, s->idx, i);
       return 0;
     }
-    ret = mt_mcast_join(impl, mt_ip_to_u32(ops->sip_addr[i]), 0,
+    ret = mt_mcast_join(impl, mt_ip_to_u32(ops->sip_addr[i]),
+                        mt_ip_to_u32(ops->mcast_sip_addr[i]),
                         mt_port_logic2phy(s->port_maps, i));
     if (ret < 0) return ret;
   }
diff --git a/lib/src/st2110/st_rx_video_session.c b/lib/src/st2110/st_rx_video_session.c
index d09deb09e..6beaa034e 100644
--- a/lib/src/st2110/st_rx_video_session.c
+++ b/lib/src/st2110/st_rx_video_session.c
@@ -2701,7 +2701,8 @@ static int rv_init_mcast(struct mtl_main_impl* impl, struct st_rx_video_session_
       info("%s(%d), skip mcast join for port %d\n", __func__, s->idx, i);
       return 0;
     }
-    ret = mt_mcast_join(impl, mt_ip_to_u32(ops->sip_addr[i]), 0, port);
+    ret = mt_mcast_join(impl, mt_ip_to_u32(ops->sip_addr[i]),
+                        mt_ip_to_u32(ops->mcast_sip_addr[i]), port);
     if (ret < 0) return ret;
   }