diff --git a/src/main/java/com/nis/util/Constants.java b/src/main/java/com/nis/util/Constants.java
index 083a5247b..30495c6b6 100644
--- a/src/main/java/com/nis/util/Constants.java
+++ b/src/main/java/com/nis/util/Constants.java
@@ -24,7 +24,7 @@ public final class Constants {
 	public static String IPV4_DEFAULT_IP_VALUE=Configurations.getStringProperty("ipv4_default_ip_value", "0.0.0.0");
 	public static String IPV6_DEFAULT_IP_VALUE=Configurations.getStringProperty("ipv4_default_ip_value", "::");
 	public static String IPV4_DEFAULT_IP_SUBNET_VALUE=Configurations.getStringProperty("ipv4_default_ip_subnet_value", "0.0.0.0/32");
-	public static String IPV6_DEFAULT_IP_SUBNET_VALUE=Configurations.getStringProperty("ipv6_default_ip_subnet_value", "::/64");
+	public static String IPV6_DEFAULT_IP_SUBNET_VALUE=Configurations.getStringProperty("ipv6_default_ip_subnet_value", "::/128");
 	public static String IPV4_DEFAULT_IP_RANGE_VALUE=Configurations.getStringProperty("ipv4_default_ip_range_value", "0.0.0.0-0.0.0.0");
 	public static String IPV6_DEFAULT_IP_RANGE_VALUE=Configurations.getStringProperty("ipv6_default_ip_range_value", "::-::");
 	/**
diff --git a/src/main/resources/nis.properties b/src/main/resources/nis.properties
index 978d7a576..e2ed8f362 100644
--- a/src/main/resources/nis.properties
+++ b/src/main/resources/nis.properties
@@ -449,7 +449,7 @@ bandwidth=Bandwidth
 #IP\u9ed8\u8ba4\u503c
 ipv4_default_ip_value=\:\:
 ipv4_default_ip_subnet_value=0.0.0.0/32
-ipv6_default_ip_subnet_value=::/64
+ipv6_default_ip_subnet_value=::/128
 ipv4_default_ip_range_value=0.0.0.0-0.0.0.0
 ipv6_default_ip_range_value=::-::
 #\u7aef\u53e3\u9ed8\u8ba4\u503c