diff --git a/vnt/src/channel/punch.rs b/vnt/src/channel/punch.rs
index 5e2f909..b093152 100644
--- a/vnt/src/channel/punch.rs
+++ b/vnt/src/channel/punch.rs
@@ -77,10 +77,11 @@ impl Punch {
                 .await;
         }
         if !nat_info.ipv6_addr.ip().is_unspecified() && nat_info.ipv6_addr.port() != 0 {
-            let _ = self
+            let rs = self
                 .context
                 .send_main_udp(buf, SocketAddr::V6(nat_info.ipv6_addr))
                 .await;
+            log::info!("发送到ipv6地址:{:?},rs={:?}", nat_info.ipv6_addr, rs);
         }
         match nat_info.nat_type {
             NatType::Symmetric => {
diff --git a/vnt/src/core/mod.rs b/vnt/src/core/mod.rs
index 70bffbd..b8f2d23 100644
--- a/vnt/src/core/mod.rs
+++ b/vnt/src/core/mod.rs
@@ -439,8 +439,14 @@ impl VntUtil {
             if let Some(udp_proxy) = udp_proxy {
                 tokio::spawn(udp_proxy.start());
             }
+            let context = context.clone();
+            let nat_test = nat_test.clone();
+            //延迟切换类型,避免无效流量
+            tokio::spawn(async move {
+                tokio::time::sleep(Duration::from_secs(15)).await;
+                context.switch(nat_test.nat_info().nat_type);
+            });
         }
-        context.switch(nat_test.nat_info().nat_type);
         Ok(Vnt {
             config: self.config,
             current_device,