diff --git a/runtime/channel.go b/runtime/channel.go
new file mode 100644
index 0000000..bf31108
--- /dev/null
+++ b/runtime/channel.go
@@ -0,0 +1,101 @@
+package runtime
+
+const (
+	FREQ_THREASHOLD = 5000
+)
+
+type Channel struct {
+	Frequenz    uint32
+	AllowedInEU bool
+	DFS         bool
+	Indoor      bool
+	SDR         bool
+}
+
+var (
+	ChannelEU   = true
+	ChannelList = map[uint32]*Channel{
+		1:   &Channel{Frequenz: 2412, AllowedInEU: true, DFS: false, Indoor: false, SDR: false},
+		2:   &Channel{Frequenz: 2417, AllowedInEU: true, DFS: false, Indoor: false, SDR: false},
+		3:   &Channel{Frequenz: 2422, AllowedInEU: true, DFS: false, Indoor: false, SDR: false},
+		4:   &Channel{Frequenz: 2427, AllowedInEU: true, DFS: false, Indoor: false, SDR: false},
+		5:   &Channel{Frequenz: 2432, AllowedInEU: true, DFS: false, Indoor: false, SDR: false},
+		6:   &Channel{Frequenz: 2437, AllowedInEU: true, DFS: false, Indoor: false, SDR: false},
+		7:   &Channel{Frequenz: 2442, AllowedInEU: true, DFS: false, Indoor: false, SDR: false},
+		8:   &Channel{Frequenz: 2447, AllowedInEU: true, DFS: false, Indoor: false, SDR: false},
+		9:   &Channel{Frequenz: 2452, AllowedInEU: true, DFS: false, Indoor: false, SDR: false},
+		10:  &Channel{Frequenz: 2457, AllowedInEU: true, DFS: false, Indoor: false, SDR: false},
+		11:  &Channel{Frequenz: 2462, AllowedInEU: true, DFS: false, Indoor: false, SDR: false},
+		12:  &Channel{Frequenz: 2467, AllowedInEU: true, DFS: false, Indoor: false, SDR: false},
+		13:  &Channel{Frequenz: 2472, AllowedInEU: true, DFS: false, Indoor: false, SDR: false},
+		14:  &Channel{Frequenz: 2484, AllowedInEU: false, DFS: false, Indoor: false, SDR: false},
+		32:  &Channel{Frequenz: 5160, AllowedInEU: true, DFS: false, Indoor: false, SDR: false},
+		34:  &Channel{Frequenz: 5170, AllowedInEU: false, DFS: false, Indoor: true, SDR: false},
+		36:  &Channel{Frequenz: 5180, AllowedInEU: true, DFS: false, Indoor: true, SDR: false},
+		38:  &Channel{Frequenz: 5190, AllowedInEU: false, DFS: false, Indoor: true, SDR: false},
+		40:  &Channel{Frequenz: 5200, AllowedInEU: true, DFS: false, Indoor: true, SDR: false},
+		42:  &Channel{Frequenz: 5210, AllowedInEU: false, DFS: false, Indoor: true, SDR: false},
+		44:  &Channel{Frequenz: 5220, AllowedInEU: true, DFS: false, Indoor: true, SDR: false},
+		46:  &Channel{Frequenz: 5230, AllowedInEU: false, DFS: false, Indoor: true, SDR: false},
+		48:  &Channel{Frequenz: 5240, AllowedInEU: true, DFS: false, Indoor: true, SDR: false},
+		50:  &Channel{Frequenz: 5250, AllowedInEU: true, DFS: true, Indoor: false, SDR: false},
+		52:  &Channel{Frequenz: 5260, AllowedInEU: true, DFS: true, Indoor: true, SDR: false},
+		54:  &Channel{Frequenz: 5270, AllowedInEU: false, DFS: true, Indoor: true, SDR: false},
+		56:  &Channel{Frequenz: 5280, AllowedInEU: true, DFS: true, Indoor: true, SDR: false},
+		58:  &Channel{Frequenz: 5290, AllowedInEU: false, DFS: true, Indoor: true, SDR: false},
+		60:  &Channel{Frequenz: 5300, AllowedInEU: true, DFS: true, Indoor: true, SDR: false},
+		62:  &Channel{Frequenz: 5310, AllowedInEU: false, DFS: true, Indoor: true, SDR: false},
+		64:  &Channel{Frequenz: 5320, AllowedInEU: true, DFS: true, Indoor: true, SDR: false},
+		68:  &Channel{Frequenz: 5340, AllowedInEU: true, DFS: true, Indoor: true, SDR: false},
+		96:  &Channel{Frequenz: 5480, AllowedInEU: true, DFS: true, Indoor: false, SDR: false},
+		100: &Channel{Frequenz: 5500, AllowedInEU: true, DFS: true, Indoor: false, SDR: false},
+		102: &Channel{Frequenz: 5510, AllowedInEU: false, DFS: true, Indoor: false, SDR: false},
+		104: &Channel{Frequenz: 5520, AllowedInEU: true, DFS: true, Indoor: false, SDR: false},
+		106: &Channel{Frequenz: 5530, AllowedInEU: false, DFS: true, Indoor: false, SDR: false},
+		108: &Channel{Frequenz: 5540, AllowedInEU: true, DFS: true, Indoor: false, SDR: false},
+		110: &Channel{Frequenz: 5550, AllowedInEU: false, DFS: true, Indoor: false, SDR: false},
+		112: &Channel{Frequenz: 5560, AllowedInEU: true, DFS: true, Indoor: false, SDR: false},
+		114: &Channel{Frequenz: 5570, AllowedInEU: true, DFS: true, Indoor: false, SDR: false},
+		116: &Channel{Frequenz: 5580, AllowedInEU: true, DFS: true, Indoor: false, SDR: false},
+		118: &Channel{Frequenz: 5590, AllowedInEU: false, DFS: true, Indoor: false, SDR: false},
+		120: &Channel{Frequenz: 5600, AllowedInEU: true, DFS: true, Indoor: false, SDR: false},
+		122: &Channel{Frequenz: 5610, AllowedInEU: false, DFS: true, Indoor: false, SDR: false},
+		124: &Channel{Frequenz: 5620, AllowedInEU: true, DFS: true, Indoor: false, SDR: false},
+		126: &Channel{Frequenz: 5630, AllowedInEU: false, DFS: true, Indoor: false, SDR: false},
+		128: &Channel{Frequenz: 5640, AllowedInEU: true, DFS: true, Indoor: false, SDR: false},
+		132: &Channel{Frequenz: 5660, AllowedInEU: true, DFS: true, Indoor: false, SDR: false},
+		134: &Channel{Frequenz: 5670, AllowedInEU: false, DFS: true, Indoor: false, SDR: false},
+		136: &Channel{Frequenz: 5680, AllowedInEU: true, DFS: true, Indoor: false, SDR: false},
+		138: &Channel{Frequenz: 5690, AllowedInEU: false, DFS: true, Indoor: false, SDR: false},
+		140: &Channel{Frequenz: 5700, AllowedInEU: true, DFS: true, Indoor: false, SDR: false},
+		142: &Channel{Frequenz: 5710, AllowedInEU: false, DFS: true, Indoor: false, SDR: false},
+		144: &Channel{Frequenz: 5720, AllowedInEU: true, DFS: true, Indoor: false, SDR: true},
+		149: &Channel{Frequenz: 5745, AllowedInEU: true, DFS: false, Indoor: false, SDR: true},
+		151: &Channel{Frequenz: 5755, AllowedInEU: true, DFS: false, Indoor: false, SDR: true},
+		153: &Channel{Frequenz: 5765, AllowedInEU: true, DFS: false, Indoor: false, SDR: true},
+		155: &Channel{Frequenz: 5775, AllowedInEU: true, DFS: false, Indoor: false, SDR: true},
+		157: &Channel{Frequenz: 5785, AllowedInEU: true, DFS: false, Indoor: false, SDR: true},
+		159: &Channel{Frequenz: 5795, AllowedInEU: true, DFS: false, Indoor: false, SDR: true},
+		161: &Channel{Frequenz: 5805, AllowedInEU: true, DFS: false, Indoor: false, SDR: true},
+		165: &Channel{Frequenz: 5825, AllowedInEU: true, DFS: false, Indoor: false, SDR: true},
+		169: &Channel{Frequenz: 5845, AllowedInEU: true, DFS: false, Indoor: false, SDR: true},
+		173: &Channel{Frequenz: 5865, AllowedInEU: true, DFS: false, Indoor: false, SDR: true},
+	}
+)
+
+func ChannelIs5GHz(channel uint32) bool {
+	fre, ok := ChannelList[channel]
+	return ok && fre.Frequenz < FREQ_THREASHOLD
+}
+
+func GetChannel(channel uint32) *Channel {
+	if ch, ok := ChannelList[channel]; ok {
+		if !ChannelEU {
+			return ch
+		}
+		if ch.AllowedInEU {
+			return ch
+		}
+	}
+	return nil
+}
diff --git a/runtime/node_ssh.go b/runtime/node_ssh.go
index 2d8cfdb..8a9ac2d 100644
--- a/runtime/node_ssh.go
+++ b/runtime/node_ssh.go
@@ -2,6 +2,7 @@ package runtime
 
 import (
 	"fmt"
+	"strings"
 
 	log "github.com/sirupsen/logrus"
 
@@ -58,7 +59,8 @@ func (n *Node) SSHUpdate(sshmgmt *ssh.Manager, iface string, oldnode *Node) {
 		return
 	}
 	radio := ssh.SSHResultToString(result)
-	if radio != "" {
+	ch := GetChannel(n.Wireless.Channel24)
+	if radio != "" || ch == nil {
 		if oldnode == nil || n.Wireless.TxPower24 != oldnode.Wireless.TxPower24 {
 			ssh.Execute(n.Address.String(), client, fmt.Sprintf(`
 				uci set wireless.%s.txpower='%d';
@@ -68,10 +70,12 @@ func (n *Node) SSHUpdate(sshmgmt *ssh.Manager, iface string, oldnode *Node) {
 		}
 		if oldnode == nil || n.Wireless.Channel24 != oldnode.Wireless.Channel24 {
 			ssh.Execute(n.Address.String(), client, fmt.Sprintf(`
+				ubus call hostapd.%s switch_chan '{"freq":%d}'
 				uci set wireless.%s.channel='%d';
 				uci commit wireless;`,
+				strings.Replace(radio, "radio", "client", 1), ch.Frequenz,
 				radio, n.Wireless.Channel24))
-			runWifi = true
+
 		}
 	}
 	result, err = ssh.Run(n.Address.String(), client, `
@@ -84,7 +88,8 @@ func (n *Node) SSHUpdate(sshmgmt *ssh.Manager, iface string, oldnode *Node) {
 		return
 	}
 	radio = ssh.SSHResultToString(result)
-	if radio != "" {
+	ch = GetChannel(n.Wireless.Channel5)
+	if radio != "" || ch == nil {
 		if oldnode == nil || n.Wireless.TxPower5 != oldnode.Wireless.TxPower5 {
 			ssh.Execute(n.Address.String(), client, fmt.Sprintf(`
 				uci set wireless.%s.txpower='%d';
@@ -94,10 +99,11 @@ func (n *Node) SSHUpdate(sshmgmt *ssh.Manager, iface string, oldnode *Node) {
 		}
 		if oldnode == nil || n.Wireless.Channel5 != oldnode.Wireless.Channel5 {
 			ssh.Execute(n.Address.String(), client, fmt.Sprintf(`
+				ubus call hostapd.%s switch_chan '{"freq":%d}'
 				uci set wireless.%s.channel='%d';
 				uci commit wireless;`,
+				strings.Replace(radio, "radio", "client", 1), ch.Frequenz,
 				radio, n.Wireless.Channel5))
-			runWifi = true
 		}
 	}
 
diff --git a/runtime/nodes.go b/runtime/nodes.go
index 6e5e1c8..da38e22 100644
--- a/runtime/nodes.go
+++ b/runtime/nodes.go
@@ -54,10 +54,18 @@ func (nodes *Nodes) notifyStats(stats *runtimeYanic.GlobalStats) {
 	}
 }
 
-func (nodes *Nodes) UpdateNode(node *Node) {
+func (nodes *Nodes) UpdateNode(node *Node) bool {
 	if node == nil {
 		log.Warn("no new node to update")
-		return
+		return false
+	}
+	if GetChannel(node.Wireless.Channel24) == nil {
+		log.Warnf("wrong wifi24 channel for '%s'", node.NodeID)
+		return false
+	}
+	if GetChannel(node.Wireless.Channel5) == nil {
+		log.Warnf("wrong wifi5 channel for '%s'", node.NodeID)
+		return false
 	}
 	nodes.Lock()
 	defer nodes.Unlock()
@@ -68,6 +76,7 @@ func (nodes *Nodes) UpdateNode(node *Node) {
 	}
 	nodes.List[node.NodeID] = node
 	nodes.notifyNode(node, true)
+	return true
 }
 
 func (nodes *Nodes) Updater() {