diff --git a/netsim/ansible/templates/initial/linux/ubuntu.j2 b/netsim/ansible/templates/initial/linux/ubuntu.j2
index e57a046c4..9dfe80864 100644
--- a/netsim/ansible/templates/initial/linux/ubuntu.j2
+++ b/netsim/ansible/templates/initial/linux/ubuntu.j2
@@ -124,7 +124,7 @@ network:
   ethernets:
 {%   if l.type in ['lag','bond'] %}
 {%     if l.type=='lag' %}
-{%       for i in interfaces if i.lag._parentindex|default(0)==l.linkindex %}
+{%       for i in interfaces if i.lag._parentindex|default(0)==l.lag.ifindex %}
     {{ i.ifname }}:
       dhcp4: no
 {%       endfor %}
@@ -138,7 +138,7 @@ network:
     {{ l.ifname }}:
       interfaces:
 {%     if l.type=='lag' %}
-{%       for i in interfaces if i.lag._parentindex|default(0)==l.linkindex %}
+{%       for i in interfaces if i.lag._parentindex|default(0)==l.lag.ifindex %}
         - {{ i.ifname }}
 {%       endfor %}
 {%     elif l.bonding.members is defined %}