diff --git a/kickstart/files/kickstart.cfg b/kickstart/files/kickstart.cfg
index a8cb299c..028aaecc 100644
--- a/kickstart/files/kickstart.cfg
+++ b/kickstart/files/kickstart.cfg
@@ -2720,6 +2720,14 @@ else  # vlan
 
     # Check whether to use inet or inet6
     ipv6_addr=$(dig +short AAAA controller.internal)
+
+    if [[ -z "${ipv6_addr}" ]]
+    then
+        # during an upgrade the controller.internal may not be defined
+        # but the scenario could be IPv6. So try to resolve the controller
+        ipv6_addr=$(dig +short AAAA controller)
+    fi
+
     if [[ -n "${ipv6_addr}" ]]
     then
         boot_address_family=inet6