diff --git a/src/yggdrasil/debug.go b/src/yggdrasil/debug.go
index 46bbd98..f6410b4 100644
--- a/src/yggdrasil/debug.go
+++ b/src/yggdrasil/debug.go
@@ -262,9 +262,12 @@ func (c *Core) DEBUG_getGlobalUDPAddr() net.Addr {
   return c.udp.sock.LocalAddr()
 }
 
-func (c *Core) DEBUG_sendUDPKeys(saddr string) {
+func (c *Core) DEBUG_maybeSendUDPKeys(saddr string) {
   addr := connAddr(saddr)
-  c.udp.sendKeys(addr)
+  c.udp.mutex.RLock()
+  _, isIn := c.udp.conns[connAddr(addr)]
+  c.udp.mutex.RUnlock()
+  if !isIn { c.udp.sendKeys(addr) }
 }
 
 ////////////////////////////////////////////////////////////////////////////////
diff --git a/yggdrasil.go b/yggdrasil.go
index 39f6170..aa8e53c 100644
--- a/yggdrasil.go
+++ b/yggdrasil.go
@@ -60,9 +60,10 @@ func (n *node) init(cfg *nodeConfig, logger *log.Logger) {
     if len(cfg.Peers) == 0 { return }
     for {
       for _, p := range cfg.Peers {
-        n.core.DEBUG_sendUDPKeys(p)
+        n.core.DEBUG_maybeSendUDPKeys(p)
         time.Sleep(time.Second)
       }
+      time.Sleep(time.Minute)
     }
   }()
 }
@@ -112,7 +113,7 @@ func (n *node) listen() {
     saddr := addr.String()
     //if _, isIn := n.peers[saddr]; isIn { continue }
     //n.peers[saddr] = struct{}{}
-    n.core.DEBUG_sendUDPKeys(saddr)
+    n.core.DEBUG_maybeSendUDPKeys(saddr)
     //fmt.Println("DEBUG:", "added multicast peer:", saddr)
   }
 }