diff --git a/group_vars/nms.yml b/group_vars/nms.yml
index cf78647..bd86e46 100644
--- a/group_vars/nms.yml
+++ b/group_vars/nms.yml
@@ -18,7 +18,7 @@ network_vip_interfaces:
   - device: eth1
     vhid: 25
     ipaddr: 172.20.25.1
-    netmask: 255.255.0.0
+    netmask: 255.255.255.0
     pass: "{{ vip25_pass }}"
     priority: "{{ vip25_priority }}"