diff --git a/mclagsyncd/mclag.h b/mclagsyncd/mclag.h
index 74ccc49e21..7a7fa7308f 100644
--- a/mclagsyncd/mclag.h
+++ b/mclagsyncd/mclag.h
@@ -108,8 +108,7 @@ typedef enum mclag_msg_type_e_ {
     MCLAG_MSG_TYPE_SET_REMOTE_IF_STATE      = 12,
     MCLAG_MSG_TYPE_DEL_REMOTE_IF_INFO       = 13,
     MCLAG_MSG_TYPE_SET_PEER_LINK_ISOLATION  = 14,
-    MCLAG_MSG_TYPE_SET_ICCP_PEER_SYSTEM_ID  = 15,
-    MCLAG_MSG_TYPE_FLUSH_FDB_BY_PORT = 20
+    MCLAG_MSG_TYPE_SET_ICCP_PEER_SYSTEM_ID  = 15
 }mclag_msg_type_e;
 
 typedef struct mclag_sub_option_hdr_t_ {    
diff --git a/mclagsyncd/mclaglink.cpp b/mclagsyncd/mclaglink.cpp
index 6cf7086b58..7e7a9aff27 100644
--- a/mclagsyncd/mclaglink.cpp
+++ b/mclagsyncd/mclaglink.cpp
@@ -422,26 +422,6 @@ void MclagLink::setFdbFlush()
     return;
 }
 
-void MclagLink::setFdbFlushByPort(char *msg)
-{
-    string port;
-    char *cur = NULL;
-    mclag_sub_option_hdr_t *op_hdr = NULL;
-    swss::NotificationProducer flushFdb(p_appl_db.get(), "FLUSHFDBREQUEST");
-    vector<FieldValueTuple> values;
-
-    cur = msg;
-    /*get port infor*/
-    op_hdr = reinterpret_cast<mclag_sub_option_hdr_t *>(static_cast<void *>(cur));
-    cur = cur + MCLAG_SUB_OPTION_HDR_LEN;
-    port.insert(0, (const char*)cur, op_hdr->op_len);
-
-    SWSS_LOG_NOTICE("send fdb flush by port %s notification", port.c_str());
-
-    flushFdb.send("ALL", port, values);
-
-    return;
-}
 
 void MclagLink::setIntfMac(char *msg)
 {
@@ -1929,10 +1909,6 @@ uint64_t MclagLink::readData()
                 setFdbFlush();
                 break;
 
-            case MCLAG_MSG_TYPE_FLUSH_FDB_BY_PORT:
-                setFdbFlushByPort(msg);
-                break;
-
             case MCLAG_MSG_TYPE_SET_INTF_MAC:
                 setIntfMac(msg);
                 break;
diff --git a/mclagsyncd/mclaglink.h b/mclagsyncd/mclaglink.h
index 3fc4a26e0e..9c23c97686 100644
--- a/mclagsyncd/mclaglink.h
+++ b/mclagsyncd/mclaglink.h
@@ -271,7 +271,6 @@ namespace swss {
             void setPortMacLearnMode(char *msg);
             void setPortMacLearnNLAPI(char *msg);
             void setFdbFlush();
-            void setFdbFlushByPort(char *msg);
             void setIntfMac(char *msg);
             void setFdbEntry(char *msg, int msg_len);