diff -r 1cb2b5450089 -r 749372538449 src/mem/ruby/network/Topology.cc
--- a/src/mem/ruby/network/Topology.cc	Sat Jun 29 00:42:55 2013 -0500
+++ b/src/mem/ruby/network/Topology.cc	Sun Jun 30 12:39:24 2013 -0500
@@ -89,7 +89,9 @@
         // Store the ExtLink pointers for later
         m_ext_link_vector.push_back(ext_link);
 
-        int ext_idx1 = abs_cntrl->params()->cntrl_id;
+        int machine_base_idx = MachineType_base_number(
+                string_to_MachineType(abs_cntrl->getName()));
+        int ext_idx1 = machine_base_idx + abs_cntrl->getVersion();
         int ext_idx2 = ext_idx1 + m_nodes;
         int int_idx = router->params()->router_id + 2*m_nodes;