diff --git a/gold/link/link.go b/gold/link/link.go
index efc40c7..4eaebd2 100644
--- a/gold/link/link.go
+++ b/gold/link/link.go
@@ -89,6 +89,14 @@ func (l *Link) Write(p *head.Packet, istransfer bool) (n int, err error) {
 			return n, err
 		}
 		data = data[(offset+1)*int(l.me.mtu):]
+		offset++
+	}
+	packet := *p
+	packet.Data = data[offset*int(l.me.mtu):]
+	i, err := l.write(&packet, uint16(offset), istransfer, false)
+	n += i
+	if err != nil {
+		return n, err
 	}
 	return n, nil
 }
@@ -122,7 +130,6 @@ func (l *Link) write(p *head.Packet, offset uint16, istransfer, hasmore bool) (n
 	if d == nil {
 		return 0, errors.New("[link] ttl exceeded")
 	}
-	logrus.Debugln("[link] write", len(d), "bytes data")
 	if err == nil {
 		peerlink := l.me.router.NextHop(p.Dst.String())
 		if peerlink != nil {
@@ -130,7 +137,7 @@ func (l *Link) write(p *head.Packet, offset uint16, istransfer, hasmore bool) (n
 			if peerep == nil {
 				return 0, errors.New("[link] nil endpoint of " + p.Dst.String())
 			}
-			logrus.Infoln("[link] write data from ep", l.me.myconn.LocalAddr(), "to", peerep)
+			logrus.Infoln("[link] write", len(d), "bytes data from ep", l.me.myconn.LocalAddr(), "to", peerep)
 			n, err = l.me.myconn.WriteToUDP(d, peerep)
 		} else {
 			logrus.Warnln("[link] drop packet: nil peerlink")
diff --git a/lower/nic.go b/lower/nic.go
index 15a9b9a..354c679 100644
--- a/lower/nic.go
+++ b/lower/nic.go
@@ -58,8 +58,8 @@ func (nc *NIC) Start(m *link.Me) {
 			logrus.Infoln("[lower] recv write", n, "bytes packet to nic")
 		}
 	}()
-	buf := make([]byte, m.MTU()+64)  // 增加报头长度与 TEA 冗余
-	buf2 := make([]byte, m.MTU()+64) // 增加报头长度与 TEA 冗余
+	buf := make([]byte, m.MTU()+68)  // 增加报头长度与 TEA 冗余
+	buf2 := make([]byte, m.MTU()+68) // 增加报头长度与 TEA 冗余
 	off := 0
 	isrev := false
 	for nc.hasstart { // 从 NIC 发送
diff --git a/main.go b/main.go
index fc87857..8cfdb15 100644
--- a/main.go
+++ b/main.go
@@ -111,7 +111,7 @@ func main() {
 	}
 
 	defer w.Stop()
-	w.Run(upper.ServiceWireGold, upper.ServiceWireGold, 32768-64)
+	w.Run(upper.ServiceWireGold, upper.ServiceWireGold, 32768-68)
 }
 
 func displayHelp(hint string) {