diff --git a/ucloud/host/virtualmachine.py b/ucloud/host/virtualmachine.py
index b3a1d2a..dbd13de 100755
--- a/ucloud/host/virtualmachine.py
+++ b/ucloud/host/virtualmachine.py
@@ -8,6 +8,7 @@ import os
 import subprocess as sp
 import tempfile
 import time
+import ipaddress
 
 from functools import wraps
 from string import Template
@@ -90,7 +91,9 @@ class VMM:
                                           tap_id=tap,
                                           ip=network_ipv6)
                 all_networks = self.etcd_client.get_prefix('/v1/network/', value_in_json=True)
-                update_radvd_conf(all_networks)
+
+                if ipaddress.ip_network(network_ipv6).is_global:
+                    update_radvd_conf(all_networks)
 
             command += " -netdev tap,id=vmnet{net_id},ifname={tap},script=no,downscript=no" \
                        " -device virtio-net-pci,netdev=vmnet{net_id},mac={mac}" \
@@ -361,7 +364,7 @@ def update_radvd_conf(all_networks):
     networks = {
         net.value['ipv6']: net.value['id']
         for net in all_networks
-        if net.value.get('ipv6')
+        if net.value.get('ipv6') and ipaddress.ip_network(net.value.get('ipv6')).is_global
     }
     radvd_template = open(os.path.join(network_script_base,
                                        'radvd-template.conf'), 'r').read()