diff --git a/geant/gap_ansible/roles/iptrunk_migration/templates/juniper/trunk_interface.j2 b/geant/gap_ansible/roles/iptrunk_migration/templates/juniper/trunk_interface.j2
index 59220828d2d9ea830dc5ac894ac034b92148fd96..e45e15465afa580253549b87a83a357dd81ca34d 100644
--- a/geant/gap_ansible/roles/iptrunk_migration/templates/juniper/trunk_interface.j2
+++ b/geant/gap_ansible/roles/iptrunk_migration/templates/juniper/trunk_interface.j2
@@ -1,7 +1,7 @@
     {##}
     {# I need to sort the source and the destination alfabetically #}
-    {% set trunk_direction_name = [ wfo_trunk.iptrunk.iptrunk_sides[0].iptrunk_side_node.router_fqdn.split(".")[1], wfo_trunk.iptrunk.iptrunk_sides[1].iptrunk_side_node.router_fqdn.split(".")[1] ] %}
-    {% set trunk_direction_name_sorted = trunk_direction_name|sort %}
+{% set trunk_direction_name = [ new_node.router.router_fqdn.split(".")[1] | upper, remaining_side.name.split(".")[1] | upper ] %}
+{% set trunk_direction_name_sorted = trunk_direction_name|sort %}
     {##}
 {% if new_side is defined  %}
     interfaces {
@@ -9,8 +9,18 @@
             description "LAG INFRASTRUCTURE BACKBONE ${{ new_side.port_sid }} | {{ trunk_direction_name_sorted[0] }}-{{ trunk_direction_name_sorted[1] }}";
             mtu 9192;
             aggregated-ether-options {
-                minimum-links {{new_side.minimum_links}};
-                {#link-speed {{common.link_speed}};#}
+              {% if new_side.trunk_type != "Dark_fiber" %}
+                bfd-liveness-detection {
+                    minimum-interval {{ bfd_min_interval }};
+                    neighbor {{ remaining_side['loopback'] }};
+                    local-address {{ new_node.router.router_lo_ipv4_address }};
+                }
+              {% endif %}
+              {% if (new_side.minimum_links | int) > 0 %}
+                minimum-links {{ new_side.minimum_links }};
+              {% endif %}
+                minimum-links {{ new_side.minimum_links }};
+                {#link-speed {{new_side.link_speed}};#}
                 lacp {
                     active;
                     periodic fast;
diff --git a/geant/gap_ansible/roles/iptrunk_migration/templates/nokia/trunk_interface.j2 b/geant/gap_ansible/roles/iptrunk_migration/templates/nokia/trunk_interface.j2
index efbceabe6d027d457530784aa11e683128da40da..414d2f6b01c4a8942898b19a7b6704d1e75baeac 100644
--- a/geant/gap_ansible/roles/iptrunk_migration/templates/nokia/trunk_interface.j2
+++ b/geant/gap_ansible/roles/iptrunk_migration/templates/nokia/trunk_interface.j2
@@ -2,11 +2,14 @@
     <configure xmlns="urn:nokia.com:sros:ns:yang:sr:conf">
 
 {##}
+{% set trunk_direction_name = [ new_node.router.router_fqdn.split(".")[1] | upper, remaining_side.name.split(".")[1] | upper ] %}
+{% set trunk_direction_name_sorted = trunk_direction_name|sort %}
+
 {% for member in new_side.members %}
       <port xmlns="urn:nokia.com:sros:ns:yang:sr:conf" xmlns:nc="urn:ietf:params:xml:ns:netconf:base:1.0" xmlns:nokia-attr="urn:nokia.com:sros:ns:yang:sr:attributes" alu:operation="replace">
           <port-id>{{ member.interface_name }}</port-id>
           <admin-state>enable</admin-state>
-          <description>PHY INFRASTRUCTURE BACKBONE P_{{ new_side.ae_name }} | {{ new_side.description }} | {{ member.interface_description }}</description>
+          <description>PHY INFRASTRUCTURE BACKBONE P_{{ new_side.ae_name }} | {{ trunk_direction_name_sorted[0] }}-{{ trunk_direction_name_sorted[1] }} | {{ member.interface_description }}</description>
           <ethernet>
               <mode>network</mode>
               <mtu>9212</mtu>
@@ -28,7 +31,7 @@
       <lag xmlns="urn:nokia.com:sros:ns:yang:sr:conf" xmlns:nc="urn:ietf:params:xml:ns:netconf:base:1.0" xmlns:nokia-attr="urn:nokia.com:sros:ns:yang:sr:attributes" alu:operation="replace">
           <lag-name>{{ new_side.ae_name | lower }}</lag-name>
           <admin-state>enable</admin-state>
-          <description>LAG INFRASTRUCTURE BACKBONE ${{ new_side.port_sid }} | {{ new_side.description }}</description>
+          <description>LAG INFRASTRUCTURE BACKBONE ${{ new_side.port_sid }} | {{ trunk_direction_name_sorted[0] }}-{{ trunk_direction_name_sorted[1] }}</description>
           <mode>network</mode>
           <lacp>
               <mode>active</mode>
@@ -39,13 +42,31 @@
               <port-id>{{ member.interface_name }}</port-id>
           </port>
 {% endfor %}
+          {% if (new_side.minimum_links | int) > 1 %}
+          <port-threshold>
+            <value>{{ (new_side.minimum_links | int) - 1 }}</value>
+            <action>down</action>
+          </port-threshold>
+          {% endif %}
+          {% if new_side.trunk_type != "Dark_fiber" %}
+          <bfd-liveness>
+              <ipv4>
+                  <admin-state>enable</admin-state>
+                  <multiplier>3</multiplier>
+                  <receive-interval>{{ bfd_min_interval }}</receive-interval>
+                  <transmit-interval>{{ bfd_min_interval }}</transmit-interval>
+                  <local-ip-address>{{ new_node.router.router_lo_ipv4_address }}</local-ip-address>
+                  <remote-ip-address>{{ remaining_side['loopback'] }}</remote-ip-address>
+              </ipv4>
+          </bfd-liveness>
+          {% endif %}
       </lag>
       <router xmlns="urn:nokia.com:sros:ns:yang:sr:conf" xmlns:nc="urn:ietf:params:xml:ns:netconf:base:1.0" xmlns:nokia-attr="urn:nokia.com:sros:ns:yang:sr:attributes">
           <router-name>Base</router-name>
           <interface alu:operation="replace">
               <interface-name>{{ new_side.ae_name | lower }}.0</interface-name>
               <admin-state>enable</admin-state>
-              <description>SRV_GLOBAL INFRASTRUCTURE BACKBONE #{{ new_side.description }}-IPTRUNK ${{ new_side.id }}| </description>
+              <description>SRV_GLOBAL INFRASTRUCTURE BACKBONE #{{ trunk_direction_name_sorted[0] }}-{{ trunk_direction_name_sorted[1] }}-IPTRUNK ${{ new_side.id }} | {{ trunk_direction_name_sorted[0] }}-{{ trunk_direction_name_sorted[1] }} | {{ new_side.description }}</description>
               <ip-mtu>9000</ip-mtu>
               <port>{{ new_side.ae_name | lower }}</port>
               <ipv4>
diff --git a/geant/gap_ansible/roles/iptrunk_migration/vars/main.yml b/geant/gap_ansible/roles/iptrunk_migration/vars/main.yml
index a0bbad43e1a68357ca3d218703b937072e9fbad8..565ba579ab88b5cc77ba5c00c60453c13574ad0d 100644
--- a/geant/gap_ansible/roles/iptrunk_migration/vars/main.yml
+++ b/geant/gap_ansible/roles/iptrunk_migration/vars/main.yml
@@ -14,6 +14,10 @@ config_objects:
   - "isis_interface"
   - "trunk_deprovision"
 
+bfd_min_interval: 3000
+mtu_phy: 9212
+mtu_ip: 9000
+
 wfo_trunk: "{{ wfo_trunk_json }}"
 config_object: "{{ object }}"
 side_a_ipv4_address: "{{ wfo_trunk.iptrunk.iptrunk_ipv4_network | ansible.utils.ipaddr('net') | ansible.utils.ipaddr('address') }}/31"
@@ -29,13 +33,17 @@ new_side:
   id: "{{ wfo_trunk.iptrunk.geant_s_sid }}"
   description: "{{ wfo_trunk.iptrunk.iptrunk_description }}"
   speed: "{{ wfo_trunk.iptrunk.iptrunk_speed }}"
-  is_leased_line: false ## FIX: it to use iptrunk_type
+  trunk_type: "{{ wfo_trunk.iptrunk.iptrunk_type }}"
   isis_metric: "{{ wfo_trunk.iptrunk.iptrunk_isis_metric }}"
   minimum_links: "{{ wfo_trunk.iptrunk.iptrunk_minimum_links }}"
-  name: "{{ wfo_trunk.iptrunk.iptrunk_sides[replace_index | int].iptrunk_side_node.router_fqdn }}"
-  router_access_via_ts: "{{ wfo_trunk.iptrunk.iptrunk_sides[replace_index | int].iptrunk_side_node.router_access_via_ts }}"
-  loopback: "{{ wfo_trunk.iptrunk.iptrunk_sides[replace_index | int].iptrunk_side_node.router_lo_ipv4_address }}"
+  # name: "{{ wfo_trunk.iptrunk.iptrunk_sides[replace_index | int].iptrunk_side_node.router_fqdn }}"
+  # router_access_via_ts: "{{ wfo_trunk.iptrunk.iptrunk_sides[replace_index | int].iptrunk_side_node.router_access_via_ts }}"
+  # loopback: "{{ wfo_trunk.iptrunk.iptrunk_sides[replace_index | int].iptrunk_side_node.router_lo_ipv4_address }}"
   ae_name: "{{ new_lag_interface }}"
   members: "{{ new_lag_member_interfaces }}"
   # members_descriptions: "{{ wfo_trunk.iptrunk.iptrunk_sides[replace_index | int].iptrunk_side_ae_members_description }}"
   port_sid: "{{ wfo_trunk.iptrunk.iptrunk_sides[replace_index | int].iptrunk_side_ae_geant_a_sid }}"
+
+remaining_side:
+  name: "{{ wfo_trunk.iptrunk.iptrunk_sides[1 - (replace_index | int)].iptrunk_side_node.router_fqdn }}"
+  loopback: "{{ wfo_trunk.iptrunk.iptrunk_sides[1 - (replace_index | int)].iptrunk_side_node.router_lo_ipv4_address }}"