diff --git a/src/network/async_main.rs b/src/network/async_main.rs
index b83634f..b93c6df 100644
--- a/src/network/async_main.rs
+++ b/src/network/async_main.rs
@@ -522,19 +522,17 @@ async fn send_packet_to_net(eee: &Node, dst_ip: u32, pkt: &[u8], size: u64) {
 
 async fn find_peer_destination(eee: &Node, dst_ip: u32) -> (SdlanSock, bool) {
     if is_multi_broadcast(dst_ip) {
-        println!("find peer destination: is multi_broadcast");
         return (
             eee.config.super_nodes[eee.config.super_node_index.load(Ordering::Relaxed) as usize]
                 .deepcopy(),
             false,
         );
     }
-    println!("find peer destination 1");
     let mut is_p2p = false;
     let result: SdlanSock;
     if let Some(dst) = eee.known_peers.get_peer(&dst_ip) {
         let now = get_current_timestamp();
-        if now - dst.last_seen.load(Ordering::Relaxed) >= ((dst.timeout / 2) as u64) {
+        if now - dst.last_p2p.load(Ordering::Relaxed) >= ((dst.timeout / 2) as u64) {
             // too much time elapsed since we saw the peer, need to register again
             eee.known_peers.delete_peer_with_ip(&dst_ip);
             result = eee.config.super_nodes
diff --git a/src/network/node.rs b/src/network/node.rs
index bb2ed76..8a02af3 100644
--- a/src/network/node.rs
+++ b/src/network/node.rs
@@ -528,6 +528,9 @@ pub struct EdgePeer {
     // 最近一次合法时间
     pub _last_valid_timestamp: AtomicU64,
 
+    // 当时间超过重新注册的时间之后，
+    // pub has_sent_last_p2p: AtomicBool,
+
     // 最近一次发送query
     pub last_sent_query: AtomicU64,
 }
diff --git a/src/network/packet.rs b/src/network/packet.rs
index 2d5b124..c8ba14b 100644
--- a/src/network/packet.rs
+++ b/src/network/packet.rs
@@ -466,7 +466,6 @@ pub async fn check_peer_registration_needed(
     peer_sock: &SdlanSock,
 ) {
     let mut p = eee.known_peers.get_peer(&src_ip);
-    println!("check peer registration needed");
     if let None = p {
         p = eee.known_peers.get_peer_by_sock(peer_sock);
         if let Some(ref k) = p {
@@ -475,20 +474,18 @@ pub async fn check_peer_registration_needed(
     }
     match p {
         None => {
-            println!("need register_with_new_peer");
             let _ = register_with_new_peer(eee, from_sn, src_ip, v6_info, peer_sock).await;
             // unimplemented!();
         }
         Some(k) => {
-            println!("peer is known");
             let now = get_current_timestamp();
             if !from_sn {
                 k.last_p2p.store(now, Ordering::Relaxed);
             }
             let last_seen = k.last_seen.load(Ordering::Relaxed);
             // more than 3 seconds
-            if now - last_seen > 3 {
-                check_known_peer_sock_change(eee, from_sn, src_ip, v6_info, peer_sock).await;
+            if now - last_seen > 1 {
+                check_known_peer_sock_change(eee, from_sn, src_ip, v6_info, peer_sock, now).await;
             }
         }
     }
@@ -501,6 +498,7 @@ async fn check_known_peer_sock_change(
     v6_info: &Option<V6Info>,
     // dev_addr: &IpSubnet,
     peersock: &SdlanSock,
+    when: u64,
 ) {
     if is_multi_broadcast(ip) {
         return;
@@ -517,8 +515,11 @@ async fn check_known_peer_sock_change(
                     );
                     eee.known_peers.delete_peer_with_ip(&ip);
                     register_with_new_peer(eee, from_sn, ip, v6_info, peersock).await;
+                } else {
+                    // from sn, sn could see a different sock with us, just ignore it
                 }
             } else {
+                p.last_seen.store(when, Ordering::Relaxed);
                 // from sn, sn could see a different sock with us, just ignore it
             }
         }