diff --git a/de/heat-templates/env/bmt402-mstr1-wrkr3-cmp0-gtw0.yaml b/de/heat-templates/env/bmt402-mstr1-wrkr3-cmp0-gtw0.yaml
index 1a9dfbc..5870228 100644
--- a/de/heat-templates/env/bmt402-mstr1-wrkr3-cmp0-gtw0.yaml
+++ b/de/heat-templates/env/bmt402-mstr1-wrkr3-cmp0-gtw0.yaml
@@ -65,7 +65,7 @@
 
         sed -i 's/.*ethernets:.*/&\n        veth-phy: {}/' ${cloud_netplan_cfg}
         sed -i 's/.*ethernets:.*/&\n        veth-br: {}/' ${cloud_netplan_cfg}
-        sed -i "s/.*ethernets:.*/&\n        $(echo ${PUBLIC_INTERFACE} | cut -d'.' -f1):\n            dhcp4: false\n            match:\n                macaddress: ${public_if_mac}\n            set-name: $(echo ${PUBLIC_INTERFACE} | cut -d'.' -f1)/" ${cloud_netplan_cfg}
+        sed -i "s/.*ethernets:.*/&\n        $(echo ${PUBLIC_INTERFACE} | cut -d'.' -f1):\n            dhcp4: false\n            mtu: 9100\n            match:\n                macaddress: ${public_if_mac}\n            set-name: $(echo ${PUBLIC_INTERFACE} | cut -d'.' -f1)/" ${cloud_netplan_cfg}
 
         if [ $STORAGE_FRONTEND_INTERFACE ]; then
      STORAGE_FRONTEND_INTERFACE_DEF="
diff --git a/de/heat-templates/env/bmt402-mstr1-wrkr3-cmp2-gtw0.yaml b/de/heat-templates/env/bmt402-mstr1-wrkr3-cmp2-gtw0.yaml
index 7e327a2..662f8e0 100644
--- a/de/heat-templates/env/bmt402-mstr1-wrkr3-cmp2-gtw0.yaml
+++ b/de/heat-templates/env/bmt402-mstr1-wrkr3-cmp2-gtw0.yaml
@@ -65,7 +65,7 @@
 
         sed -i 's/.*ethernets:.*/&\n        veth-phy: {}/' ${cloud_netplan_cfg}
         sed -i 's/.*ethernets:.*/&\n        veth-br: {}/' ${cloud_netplan_cfg}
-        sed -i "s/.*ethernets:.*/&\n        $(echo ${PUBLIC_INTERFACE} | cut -d'.' -f1):\n            dhcp4: false\n            match:\n                macaddress: ${public_if_mac}\n            set-name: $(echo ${PUBLIC_INTERFACE} | cut -d'.' -f1)/" ${cloud_netplan_cfg}
+        sed -i "s/.*ethernets:.*/&\n        $(echo ${PUBLIC_INTERFACE} | cut -d'.' -f1):\n            dhcp4: false\n            mtu: 9100\n            match:\n                macaddress: ${public_if_mac}\n            set-name: $(echo ${PUBLIC_INTERFACE} | cut -d'.' -f1)/" ${cloud_netplan_cfg}
 
         if [ $STORAGE_FRONTEND_INTERFACE ]; then
      STORAGE_FRONTEND_INTERFACE_DEF="