diff --git a/netsim/ansible/templates/initial/dellos10.j2 b/netsim/ansible/templates/initial/dellos10.j2
index e00d8a6532..fbd1980143 100644
--- a/netsim/ansible/templates/initial/dellos10.j2
+++ b/netsim/ansible/templates/initial/dellos10.j2
@@ -22,6 +22,8 @@ interface loopback0
 {% endif %}
 {% if 'ipv6' in loopback %}
  ipv6 address {{ loopback.ipv6 }}
+{% else %}
+ no ipv6 enable
 {% endif %}
 !
 interface {{ mgmt.ifname|default('mgmt1/1/1') }}