HSRP Link #1                                      HSRP Link #2
  (bonded pair)                                     (bonded pair)
       ||                                                ||
       ||                                                ||
       ||                                                ||
+--> Switch <-- cross-con --> Switch <-- cross-con --> Switch <--+
|     Cab1                     Cab3                     Cab5     |
|                                                                |
|                    Spanning Tree (STP) Loop                    |
+----------------------------------------------------------------+