@@ -721,7 +721,7 @@ function start_neutron_agents {

                 sudo ip addr del $IP dev $PUBLIC_INTERFACE

                 sudo ip addr add $IP dev $OVS_PHYSICAL_BRIDGE

             done

-            sudo route add -net $FIXED_RANGE gw $NETWORK_GATEWAY dev $OVS_PHYSICAL_BRIDGE

+            sudo ip route replace $FIXED_RANGE via $NETWORK_GATEWAY dev $OVS_PHYSICAL_BRIDGE

         fi

     fi

@@ -1275,7 +1275,7 @@ function _neutron_configure_router_v4 {

             fi

             ROUTER_GW_IP=`neutron port-list -c fixed_ips -c device_owner | grep router_gateway | awk -F '"' -v subnet_id=$PUB_SUBNET_ID '$4 == subnet_id { print $8; }'`

             die_if_not_set $LINENO ROUTER_GW_IP "Failure retrieving ROUTER_GW_IP"

-            sudo route add -net $FIXED_RANGE gw $ROUTER_GW_IP

+            sudo ip route replace  $FIXED_RANGE via $ROUTER_GW_IP

         fi

         _neutron_set_router_id

     fi

@@ -1310,7 +1310,7 @@ function _neutron_configure_router_v6 {

             # Configure interface for public bridge

             sudo ip -6 addr add $ipv6_ext_gw_ip/$ipv6_cidr_len dev $ext_gw_interface

-            sudo ip -6 route add $FIXED_RANGE_V6 via $IPV6_ROUTER_GW_IP dev $ext_gw_interface

+            sudo ip -6 route replace $FIXED_RANGE_V6 via $IPV6_ROUTER_GW_IP dev $ext_gw_interface

         fi

         _neutron_set_router_id

     fi