diff --git a/bird/filter/unet_filter.conf b/bird/filter/unet_filter.conf
new file mode 100644
index 0000000..589731b
--- /dev/null
+++ b/bird/filter/unet_filter.conf
@@ -0,0 +1,42 @@
+function function_unet_import() {
+    if !unet_is_valid_network() then return false;
+    if is_unet_self_net() then return false;
+    bgp_large_community.add((UNET_ASN,200,0));
+    return true;
+}
+
+function function_unet_export() {
+    if !unet_is_valid_network() then reject; 
+    if source !~ [RTS_STATIC, RTS_BGP] then reject;
+     if bgp_large_community !~ [(UNET_ASN, 200,0)] then reject;      
+    accept;
+}
+
+function function_unet_only_import() {
+    if !unet_is_valid_network_v4() then return false;
+    if is_unet_self_net() then return false;
+    bgp_large_community.add((UNET_ASN,200,0));
+    return true;
+}
+
+function function_unet_only_export() {
+    if !unet_is_valid_network_v4() then return false;
+    if source !~ [RTS_STATIC, RTS_BGP] then return false;
+    if bgp_large_community !~ [(UNET_ASN, 200,0)] then return false;      
+    return true;
+}
+
+
+function function_unet_ibgp_import() {
+    if bgp_large_community ~ [(UNET_ASN, 1,*)] then return false;
+    if !unet_is_valid_network() then return false;
+    if is_unet_self_net() then return false;
+    return true;
+}
+
+function function_unet_ibgp_export() {
+    if bgp_large_community ~ [(UNET_ASN, 1,*)] then return false;
+    if !unet_is_valid_network() then return false;
+    if is_unet_self_net() then return false;
+    return true;
+}
diff --git a/bird/function/unet.conf b/bird/function/unet.conf
index d07d4fd..0687427 100644
--- a/bird/function/unet.conf
+++ b/bird/function/unet.conf
@@ -23,3 +23,11 @@ function is_unet_self_net() {
         else: print "is_unet_prefix: unexpected net.type ", net.type, " ", net; return false;
     }
 }
+
+
+function unet_is_valid_network() {
+    case net.type {
+        NET_IP4: return unet_is_valid_network_v4_allnet();
+        NET_IP6: return unet_is_voalid_net_v6();
+    }
+}
\ No newline at end of file
diff --git a/bird/template/unet.conf b/bird/template/unet.conf
index 6459a8c..5a4f483 100644
--- a/bird/template/unet.conf
+++ b/bird/template/unet.conf
@@ -3,34 +3,14 @@ template bgp unet_bgp_up0 {
     local as UNET_ASN;
     ipv4 {
         table unet4;
-        import filter {
-          if !unet_is_valid_network_v4_allnet() then reject;
-          if is_unet_self_net() then reject;
-          bgp_large_community.add((UNET_ASN,200,0));
-          accept;
-        };
-        export filter { 
-            if !unet_is_valid_network_v4_allnet() then reject; 
-            if source !~ [RTS_STATIC, RTS_BGP] then reject;
-            if bgp_large_community !~ [(UNET_ASN, 200,0)] then reject;      
-            accept;
-        };
+        import filter {if !function_unet_import() then reject; accept; };
+        export filter {if !function_unet_export() then reject; accept; };
         import limit 9000 action block; 
     };
     ipv6 {
         table unet6;
-        import filter {
-          if !unet_is_voalid_net_v6() then reject;
-          if is_unet_self_net() then reject;
-          bgp_large_community.add((UNET_ASN,200,0));
-          accept;
-        };
-        export filter { 
-            if !unet_is_voalid_net_v6() then reject; 
-            if source !~ [RTS_STATIC, RTS_BGP] then reject;
-            if bgp_large_community !~ [(UNET_ASN, 200,0)] then reject;      
-            accept;
-        };
+        import filter {if !function_unet_import() then reject; accept; };
+        export filter {if !function_unet_export() then reject; accept; };
         import limit 9000 action block; 
     };
 }
@@ -40,18 +20,8 @@ template bgp unet_bgp_up1 {
     local as UNET_ASN;
     ipv4 {
         table unet4;
-        import filter {
-          if !unet_is_valid_network_v4() then reject;
-          if is_unet_self_net() then reject;
-          bgp_large_community.add((UNET_ASN,200,0));
-          accept;
-        };
-        export filter { 
-            if !unet_is_valid_network_v4() then reject; 
-            if source !~ [RTS_STATIC, RTS_BGP] then reject;
-            if bgp_large_community !~ [(UNET_ASN, 200,0)] then reject;      
-            accept;
-        };
+        import filter {if !function_unet_only_import() then reject; accept; };
+        export filter {if !function_unet_only_export() then reject; accept; };
         import limit 9000 action block; 
     };
 }
@@ -65,34 +35,14 @@ template bgp unet_ibgp {
         table unet4;
         next hop self;
         gateway direct;
-        import filter { 
-            if bgp_large_community ~ [(UNET_ASN, 1,*)] then reject;
-            if !unet_is_valid_network_v4_allnet() then reject;
-            if is_unet_self_net() then reject;
-            accept; 
-        };
-        export filter { 
-            if bgp_large_community ~ [(UNET_ASN, 1,*)] then reject;
-            if !unet_is_valid_network_v4_allnet() then reject;
-            if is_unet_self_net() then reject;
-            accept;
-            };
+        import filter {if !function_unet_ibgp_import() then reject; accept; };
+        export filter {if !function_unet_ibgp_export() then reject; accept; };
     };
     ipv6 {
         table unet6;
         next hop self;
         gateway direct;
-        import filter { 
-            if bgp_large_community ~ [(UNET_ASN, 1,*)] then reject;
-            if !unet_is_voalid_net_v6() then reject;
-            if is_unet_self_net() then reject;
-            accept; 
-        };
-        export filter { 
-            if bgp_large_community ~ [(UNET_ASN, 1,*)] then reject;
-            if !unet_is_voalid_net_v6() then reject;
-            if is_unet_self_net() then reject;
-            accept;
-            };
+        import filter {if !function_unet_ibgp_import() then reject; accept; };
+        export filter {if !function_unet_ibgp_export() then reject; accept; };
     };
 }
\ No newline at end of file
diff --git a/update.sh b/update.sh
index f6b53e6..30c5adc 100644
--- a/update.sh
+++ b/update.sh
@@ -6,6 +6,12 @@ git clone https://git.nia.ink/brnet/bird_config.git
 rm /etc/bird/filter/*.conf
 mv ./bird_config/bird/filter/*.conf /etc/bird/filter/
 
+rm /etc/bird/function/*.conf
+mv ./bird_config/bird/function/*.conf /etc/bird/function/
+
+rm /etc/bird/template/*.conf
+mv ./bird_config/bird/template/*.conf /etc/bird/template/
+
 
 birdc c
 cd