diff --git a/network/src/discovery_service.rs b/network/src/discovery_service.rs
index 07ad59193e..50ed660341 100644
--- a/network/src/discovery_service.rs
+++ b/network/src/discovery_service.rs
@@ -24,6 +24,7 @@ use std::time::Instant;
 use std::usize;
 use tokio::io::{AsyncRead, AsyncWrite};
 use tokio::prelude::{task, Async, Poll};
+use tokio::spawn;
 use tokio::timer::Interval;
 use tokio::timer::Timeout;
 use transport::TransportOutput;
@@ -375,6 +376,14 @@ where
 
     fn handle_kad_controller_request(&self, peer_id: PeerId) {
         let mut kad_manage = self.kad_manage.lock();
+        if &peer_id == self.network.local_peer_id() {
+            debug!(
+                target: "discovery",
+                "ignore kad dial to self"
+                );
+            kad_manage.kad_pending_dials.remove(&peer_id);
+            return;
+        }
         let peer_store = self.network.peer_store().read();
         if let Some(addrs) = peer_store.peer_addrs(&peer_id) {
             for addr in addrs {
@@ -648,12 +657,16 @@ impl KadManage {
                 }
             });
 
-        let _ = kad_connection.dial(swarm_controller, addr, transport);
+        let dial_future = kad_connection.dial(swarm_controller, addr, transport);
+        spawn(dial_future.then(|err| {
+            debug!(target: "discovery", "dialing result {:?}", err);
+            future::ok(())
+        }));
         Ok(())
     }
 
     fn drop_connection(&mut self, peer_id: &PeerId) {
-        debug!(target: "discovery","disconnect kad connection from {:?}", peer_id);
+        debug!(target: "discovery","drop kad connection from {:?}", peer_id);
         self.kad_connections.remove(peer_id);
     }
 }
diff --git a/network/src/network.rs b/network/src/network.rs
index 23b579edc4..10bb9345db 100644
--- a/network/src/network.rs
+++ b/network/src/network.rs
@@ -73,6 +73,7 @@ pub struct Network {
     pub(crate) original_listened_addresses: RwLock<Vec<Multiaddr>>,
     pub(crate) ckb_protocols: CKBProtocols<Arc<CKBProtocolHandler>>,
     local_private_key: secio::SecioKeyPair,
+    local_peer_id: PeerId,
 }
 
 impl Network {
@@ -80,6 +81,10 @@ impl Network {
         self.peers_registry.write().drop_peer(&peer_id);
     }
 
+    pub fn local_peer_id(&self) -> &PeerId {
+        &self.local_peer_id
+    }
+
     pub(crate) fn add_peer(&self, peer_id: PeerId, peer: PeerConnection) {
         let mut peers_registry = self.peers_registry.write();
         peers_registry.add_peer(peer_id, peer);
@@ -314,6 +319,11 @@ impl Network {
         St::IncomingUpgrade: Send,
         C: Send + 'static,
     {
+        if expected_peer_id == self.local_peer_id() {
+            debug!(target: "network", "ignore dial to self");
+            return;
+        }
+        debug!(target: "network", "dial to peer {:?} address {:?}", expected_peer_id, addr);
         for protocol in &self.ckb_protocols.0 {
             self.dial_to_peer_protocol(
                 transport.clone(),
@@ -450,6 +460,7 @@ impl Network {
             original_listened_addresses: RwLock::new(Vec::new()),
             ckb_protocols: CKBProtocols(ckb_protocols),
             local_private_key: local_private_key.clone(),
+            local_peer_id: local_private_key.to_peer_id(),
         });
         Ok(network)
     }
@@ -481,9 +492,9 @@ impl Network {
                 let local_peer_id = local_peer_id.clone();
                 move |(peer_id, stream), _endpoint, remote_addr_fut| {
                     remote_addr_fut.and_then(move |remote_addr| {
-                        trace!(target: "network", "connection from {:?}", remote_addr);
+                        debug!(target: "network", "connection from {:?} peer_id: {:?}", remote_addr, peer_id);
                         if peer_id == local_peer_id {
-                            trace!(target: "network", "connect to self, disconnect");
+                            debug!(target: "network", "connect to self, disconnect");
                             return Err(IoErrorKind::ConnectionRefused.into());
                         }
                         let out = TransportOutput {
diff --git a/network/src/outgoing_service.rs b/network/src/outgoing_service.rs
index d988e08d0d..506e928e7d 100644
--- a/network/src/outgoing_service.rs
+++ b/network/src/outgoing_service.rs
@@ -78,6 +78,7 @@ impl<T: Send + 'static> ProtocolService<T> for OutgoingService {
         }).for_each({
             let transport = transport.clone();
             let timeout = self.timeout;
+            let network = Arc::clone(&network);
             move |_| {
                 let connection_status = network.connection_status();
                 let new_outgoing = (connection_status.max_outgoing
@@ -88,8 +89,13 @@ impl<T: Send + 'static> ProtocolService<T> for OutgoingService {
                     for (peer_id, addr) in peer_store
                         .peers_to_attempt()
                         .take(new_outgoing)
-                        .map(|(addr, peer_id)| (addr.clone(), peer_id.clone()))
-                    {
+                        .filter_map(|(peer_id, addr)| {
+                            if network.local_peer_id() != peer_id {
+                                Some((peer_id.clone(), addr.clone()))
+                            } else {
+                                None
+                            }
+                        }) {
                         network.dial_to_peer(
                             transport.clone(),
                             &addr,