fix

files/bridge-post-scripts/pre-down.sh.j2

@@ -17,6 +17,13 @@ handle_gateway() {
   GATEWAY_ADDRESS=$2
   GATEWAY_MAC=$3
   GATEWAY_NEXT_HOP_MARK=$[$GATEWAY_ID + 1100]
+  BRIDGE_IP=$(ip -4 addr show dev "$BRIDGE_NAME" | grep 'inet ' | awk '{print $2}')
+  if [[ "$GATEWAY_ADDRESS" -eq "_use_first" ]]; then
+    GATEWAY_ADDRESS=$(subnetcalc "$BRIDGE_IP" -n | grep "Host Range" | awk '{print $5}')
+  fi
+  if [[ "$GATEWAY_ADDRESS" -eq "_use_last" ]]; then
+    GATEWAY_ADDRESS=$(subnetcalc "$BRIDGE_IP" -n | grep "Host Range" | awk '{print $7}')
+  fi
   ip rule del pref 100 fwmark "$GATEWAY_NEXT_HOP_MARK" lookup "$GATEWAY_NEXT_HOP_MARK"
   eth_origin -D "$BRIDGE_NAME" "$GATEWAY_ID" "$GATEWAY_ADDRESS" "$GATEWAY_MAC"
 }