diff --git a/initrd-network.sh b/initrd-network.sh
index f812645..2c295a8 100644
--- a/initrd-network.sh
+++ b/initrd-network.sh
@@ -262,6 +262,7 @@ flush_ipv4_config() {
     sed -i "/\./d" /etc/resolv.conf
 }
 
+should_disable_dhcpv4=false
 should_disable_accept_ra=false
 should_disable_autoconf=false
 
@@ -386,12 +387,7 @@ done
 # 由于还没设置静态ip，所以有条目表示有动态地址
 is_have_ipv4_addr && dhcpv4=true || dhcpv4=false
 is_have_ipv6_addr && dhcpv6_or_slaac=true || dhcpv6_or_slaac=false
-if is_have_ipv6_gateway; then
-    ra_has_gateway=true
-    ipv6_gateway_from_ra=$(get_ipv6_gateway)
-else
-    ra_has_gateway=false
-fi
+is_have_ipv6_gateway && ra_has_gateway=true || ra_has_gateway=false
 
 # 如果自动获取的 IP 不是重装前的，则改成静态，使用之前的 IP
 # 只比较 IP，不比较掩码/网关，因为
@@ -400,13 +396,12 @@ fi
 if $dhcpv4 && [ -n "$ipv4_addr" ] && [ -n "$ipv4_gateway" ] &&
     ! [ "$(echo "$ipv4_addr" | cut -d/ -f1)" = "$(get_first_ipv4_addr | cut -d/ -f1)" ]; then
     echo "IPv4 address obtained from DHCP is different from old system."
-    dhcpv4=false
+    should_disable_dhcpv4=true
     flush_ipv4_config
 fi
 if $dhcpv6_or_slaac && [ -n "$ipv6_addr" ] && [ -n "$ipv6_gateway" ] &&
     ! [ "$(echo "$ipv6_addr" | cut -d/ -f1)" = "$(get_first_ipv6_addr | cut -d/ -f1)" ]; then
     echo "IPv6 address obtained from SLAAC/DHCPv6 is different from old system."
-    dhcpv6_or_slaac=false
     should_disable_accept_ra=true
     should_disable_autoconf=true
     flush_ipv6_config
@@ -428,7 +423,7 @@ if ! $ipv4_has_internet &&
     $dhcpv4 && [ -n "$ipv4_addr" ] && [ -n "$ipv4_gateway" ] &&
     ! { [ "$ipv4_addr" = "$(get_first_ipv4_addr)" ] && [ "$ipv4_gateway" = "$(get_first_ipv4_gateway)" ]; }; then
     echo "IPv4 netmask/gateway obtained from DHCP is different from old system."
-    dhcpv4=false
+    should_disable_dhcpv4=true
     flush_ipv4_config
     add_missing_ipv4_config
     test_internet
@@ -439,7 +434,6 @@ if ! $ipv6_has_internet &&
     [ -n "$ipv6_addr" ] && [ -n "$ipv6_gateway" ] &&
     ! { [ "$ipv6_addr" = "$(get_first_ipv6_addr)" ] && [ "$ipv6_gateway" = "$(get_first_ipv6_gateway)" ]; }; then
     echo "IPv6 netmask/gateway obtained from SLAAC/DHCPv6 is different from old system."
-    dhcpv6_or_slaac=false
     should_disable_accept_ra=true
     should_disable_autoconf=true
     flush_ipv6_config
@@ -447,24 +441,29 @@ if ! $ipv6_has_internet &&
     test_internet
 fi
 
-# 如果是静态地址（包括动态无法上网而改成静态的），但是 RA 有网关且和正确的网关不同，要关闭 RA，避免自动设置网关
-# TODO: 测试 RA 给的网关和静态设置的网关的优先级
-if $ipv6_has_internet && ! $dhcpv6_or_slaac && $ra_has_gateway &&
-    ! [ "$(get_first_ipv6_gateway)" = "$ipv6_gateway_from_ra" ]; then
-    echo "Ignore IPv6 gateway from RA."
-    should_disable_accept_ra=true
-fi
-
 # 要删除不联网协议的ip，因为
 # 1 甲骨文云管理面板添加ipv6地址然后取消
 #   依然会分配ipv6地址，但ipv6没网络
 #   此时alpine只会用ipv6下载apk，而不用会ipv4下载
-# 2 有ipv4地址但没有ipv4网关的情况(vultr)，aria2会用ipv4下载
-if $ipv4_has_internet && ! $ipv6_has_internet; then
-    flush_ipv6_config
-elif ! $ipv4_has_internet && $ipv6_has_internet; then
+# 2 有ipv4地址但没有ipv4网关的情况(vultr $2.5 ipv6 only)，aria2会用ipv4下载
+
+# 假设 ipv4 ipv6 在不同网卡，ipv4 能上网但 ipv6 不能上网，这时也要删除 ipv6
+# 不能用 ipv4_has_internet && ! ipv6_has_internet 判断，因为它判断的是同一个网卡
+if ! $ipv4_has_internet; then
+    if $dhcpv4; then
+        should_disable_dhcpv4=true
+    fi
     flush_ipv4_config
 fi
+if ! $ipv6_has_internet; then
+    # 防止删除 IPv6 后再次通过 SLAAC 获得
+    # 不用判断 || $ra_has_gateway ，因为没有 IPv6 地址但有 IPv6 网关时，不会出现下载问题
+    if $dhcpv6_or_slaac; then
+        should_disable_accept_ra=true
+        should_disable_autoconf=true
+    fi
+    flush_ipv6_config
+fi
 
 # 如果联网了，但没获取到默认 DNS，则添加我们的 DNS
 if $ipv4_has_internet && ! { [ -e /etc/resolv.conf ] && is_have_ipv4_dns; }; then
@@ -481,6 +480,7 @@ netconf="/dev/netconf/$ethx"
 mkdir -p "$netconf"
 $dhcpv4 && echo 1 >"$netconf/dhcpv4" || echo 0 >"$netconf/dhcpv4"
 $dhcpv6_or_slaac && echo 1 >"$netconf/dhcpv6_or_slaac" || echo 0 >"$netconf/dhcpv6_or_slaac"
+$should_disable_dhcpv4 && echo 1 >"$netconf/should_disable_dhcpv4" || echo 0 >"$netconf/should_disable_dhcpv4"
 $should_disable_accept_ra && echo 1 >"$netconf/should_disable_accept_ra" || echo 0 >"$netconf/should_disable_accept_ra"
 $should_disable_autoconf && echo 1 >"$netconf/should_disable_autoconf" || echo 0 >"$netconf/should_disable_autoconf"
 $is_in_china && echo 1 >"$netconf/is_in_china" || echo 0 >"$netconf/is_in_china"
diff --git a/trans.sh b/trans.sh
index 6580352..80afd76 100644
--- a/trans.sh
+++ b/trans.sh
@@ -605,7 +605,7 @@ get_netconf_to() {
     eval "$1='$res'"
 }
 
-is_ipv4_has_internet() {
+is_any_ipv4_has_internet() {
     grep -q 1 /dev/netconf/*/ipv4_has_internet
 }
 
@@ -616,12 +616,20 @@ is_in_china() {
 # 有 dhcpv4 不等于有网关，例如 vultr 纯 ipv6
 # 没有 dhcpv4 不等于是静态ip，可能是没有 ip
 is_dhcpv4() {
+    if ! is_ipv4_has_internet || should_disable_dhcpv4; then
+        return 1
+    fi
+
     get_netconf_to dhcpv4
     # shellcheck disable=SC2154
     [ "$dhcpv4" = 1 ]
 }
 
 is_staticv4() {
+    if ! is_ipv4_has_internet; then
+        return 1
+    fi
+
     if ! is_dhcpv4; then
         get_netconf_to ipv4_addr
         get_netconf_to ipv4_gateway
@@ -633,6 +641,10 @@ is_staticv4() {
 }
 
 is_staticv6() {
+    if ! is_ipv6_has_internet; then
+        return 1
+    fi
+
     if ! is_slaac && ! is_dhcpv6; then
         get_netconf_to ipv6_addr
         get_netconf_to ipv6_gateway
@@ -649,6 +661,24 @@ is_dhcpv6_or_slaac() {
     [ "$dhcpv6_or_slaac" = 1 ]
 }
 
+is_ipv4_has_internet() {
+    get_netconf_to ipv4_has_internet
+    # shellcheck disable=SC2154
+    [ "$ipv4_has_internet" = 1 ]
+}
+
+is_ipv6_has_internet() {
+    get_netconf_to ipv6_has_internet
+    # shellcheck disable=SC2154
+    [ "$ipv6_has_internet" = 1 ]
+}
+
+should_disable_dhcpv4() {
+    get_netconf_to should_disable_dhcpv4
+    # shellcheck disable=SC2154
+    [ "$should_disable_dhcpv4" = 1 ]
+}
+
 should_disable_accept_ra() {
     get_netconf_to should_disable_accept_ra
     # shellcheck disable=SC2154
@@ -664,7 +694,12 @@ should_disable_autoconf() {
 is_slaac() {
     # 如果是静态（包括自动获取到 IP 但无法联网而切换成静态）直接返回 1，不考虑 ra
     # 防止部分机器slaac/dhcpv6获取的ip/网关无法上网
-    if ! is_dhcpv6_or_slaac; then
+
+    # 有可能 ra 的 dhcpv6/slaac 是打开的，但实测无法获取到 ipv6 地址
+    # is_dhcpv6_or_slaac 是实测结果，因此如果实测不通过，也返回 1
+
+    # 不要判断 is_staticv6，因为这会导致死循环
+    if ! is_ipv6_has_internet || ! is_dhcpv6_or_slaac || should_disable_accept_ra || should_disable_autoconf; then
         return 1
     fi
     get_netconf_to slaac
@@ -675,7 +710,12 @@ is_slaac() {
 is_dhcpv6() {
     # 如果是静态（包括自动获取到 IP 但无法联网而切换成静态）直接返回 1，不考虑 ra
     # 防止部分机器slaac/dhcpv6获取的ip/网关无法上网
-    if ! is_dhcpv6_or_slaac; then
+
+    # 有可能 ra 的 dhcpv6/slaac 是打开的，但实测无法获取到 ipv6 地址
+    # is_dhcpv6_or_slaac 是实测结果，因此如果实测不通过，也返回 1
+
+    # 不要判断 is_staticv6，因为这会导致死循环
+    if ! is_ipv6_has_internet || ! is_dhcpv6_or_slaac || should_disable_accept_ra || should_disable_autoconf; then
         return 1
     fi
     get_netconf_to dhcpv6
@@ -2017,7 +2057,7 @@ EOF
             git_uri=https://mirror.nju.edu.cn/git/gentoo-portage.git
         else
             # github 不支持 ipv6
-            is_ipv4_has_internet && git_uri=https://github.com/gentoo-mirror/gentoo.git ||
+            is_any_ipv4_has_internet && git_uri=https://github.com/gentoo-mirror/gentoo.git ||
                 git_uri=https://anongit.gentoo.org/git/repo/gentoo.git
         fi
 
@@ -2758,10 +2798,10 @@ create_cloud_init_network_config() {
                     \"address\": \"$ipv6_addr\",
                     \"gateway\": \"$ipv6_gateway\" }
                     " $ci_file
-            # 无法设置 autoconf = false ?
-            if should_disable_accept_ra; then
-                yq -i ".network.config[$config_id].accept-ra = false" $ci_file
-            fi
+        fi
+        # 无法设置 autoconf = false ?
+        if should_disable_accept_ra; then
+            yq -i ".network.config[$config_id].accept-ra = false" $ci_file
         fi
 
         # 有 ipv6 但需设置 dns 的情况