diff -r 02c70f796d07 -r aec1290f47bf configs/ruby/MESI_Two_Level.py
--- a/configs/ruby/MESI_Two_Level.py	Mon Aug 10 10:59:55 2015 -0500
+++ b/configs/ruby/MESI_Two_Level.py	Mon Aug 10 12:39:50 2015 -0500
@@ -242,5 +242,6 @@
 
         all_cntrls = all_cntrls + [io_controller]
 
+    ruby_system.network.number_of_virtual_networks = 3
     topology = create_topology(all_cntrls, options)
     return (cpu_sequencers, dir_cntrl_nodes, topology)
diff -r 02c70f796d07 -r aec1290f47bf configs/ruby/MI_example.py
--- a/configs/ruby/MI_example.py	Mon Aug 10 10:59:55 2015 -0500
+++ b/configs/ruby/MI_example.py	Mon Aug 10 12:39:50 2015 -0500
@@ -190,5 +190,6 @@
 
         all_cntrls = all_cntrls + [io_controller]
 
+    ruby_system.network.number_of_virtual_networks = 5
     topology = create_topology(all_cntrls, options)
     return (cpu_sequencers, dir_cntrl_nodes, topology)
diff -r 02c70f796d07 -r aec1290f47bf configs/ruby/MOESI_CMP_directory.py
--- a/configs/ruby/MOESI_CMP_directory.py	Mon Aug 10 10:59:55 2015 -0500
+++ b/configs/ruby/MOESI_CMP_directory.py	Mon Aug 10 12:39:50 2015 -0500
@@ -247,5 +247,6 @@
         all_cntrls = all_cntrls + [io_controller]
 
 
+    ruby_system.network.number_of_virtual_networks = 3
     topology = create_topology(all_cntrls, options)
     return (cpu_sequencers, dir_cntrl_nodes, topology)
diff -r 02c70f796d07 -r aec1290f47bf configs/ruby/MESI_Three_Level.py
--- a/configs/ruby/MESI_Three_Level.py	Mon Aug 10 10:59:55 2015 -0500
+++ b/configs/ruby/MESI_Three_Level.py	Mon Aug 10 12:39:50 2015 -0500
@@ -268,5 +268,6 @@
 
         all_cntrls = all_cntrls + [io_controller]
 
+    ruby_system.network.number_of_virtual_networks = 3
     topology = create_topology(all_cntrls, options)
     return (cpu_sequencers, dir_cntrl_nodes, topology)
diff -r 02c70f796d07 -r aec1290f47bf configs/ruby/MOESI_hammer.py
--- a/configs/ruby/MOESI_hammer.py	Mon Aug 10 10:59:55 2015 -0500
+++ b/configs/ruby/MOESI_hammer.py	Mon Aug 10 12:39:50 2015 -0500
@@ -266,5 +266,6 @@
 
         all_cntrls = all_cntrls + [io_controller]
 
+    ruby_system.network.number_of_virtual_networks = 6
     topology = create_topology(all_cntrls, options)
     return (cpu_sequencers, dir_cntrl_nodes, topology)
diff -r 02c70f796d07 -r aec1290f47bf configs/ruby/Network_test.py
--- a/configs/ruby/Network_test.py	Mon Aug 10 10:59:55 2015 -0500
+++ b/configs/ruby/Network_test.py	Mon Aug 10 12:39:50 2015 -0500
@@ -126,5 +126,6 @@
 
 
     all_cntrls = l1_cntrl_nodes + dir_cntrl_nodes
+    ruby_system.network.number_of_virtual_networks = 3
     topology = create_topology(all_cntrls, options)
     return (cpu_sequencers, dir_cntrl_nodes, topology)
diff -r 02c70f796d07 -r aec1290f47bf configs/ruby/MOESI_CMP_token.py
--- a/configs/ruby/MOESI_CMP_token.py	Mon Aug 10 10:59:55 2015 -0500
+++ b/configs/ruby/MOESI_CMP_token.py	Mon Aug 10 12:39:50 2015 -0500
@@ -275,5 +275,6 @@
         all_cntrls = all_cntrls + [io_controller]
 
 
+    ruby_system.network.number_of_virtual_networks = 6
     topology = create_topology(all_cntrls, options)
     return (cpu_sequencers, dir_cntrl_nodes, topology)
diff -r 02c70f796d07 -r aec1290f47bf src/mem/ruby/network/Network.py
--- a/src/mem/ruby/network/Network.py	Mon Aug 10 10:59:55 2015 -0500
+++ b/src/mem/ruby/network/Network.py	Mon Aug 10 12:39:50 2015 -0500
@@ -39,7 +39,10 @@
     topology = Param.String("Not Specified",
                             "the name of the imported topology module")
 
-    number_of_virtual_networks = Param.Int(10, "")
+    number_of_virtual_networks = Param.Unsigned("Number of virtual networks "
+           "used by the coherence protocol in use.  Assuming the protocol "
+           "numbers vnets starting from 0, the number of virtual networks "
+           "should be one more than the highest numbered vnet in use.")
     control_msg_size = Param.Int(8, "")
     ruby_system = Param.RubySystem("")