Index: precise/extras/rule_generator/75-persistent-net-generator.rules
===================================================================
--- precise.orig/extras/rule_generator/75-persistent-net-generator.rules	2013-01-14 16:20:22.000000000 -0800
+++ precise/extras/rule_generator/75-persistent-net-generator.rules	2013-01-14 16:21:56.000000000 -0800
@@ -37,6 +37,8 @@
 ENV{MATCHADDR}=="00:15:5d:*", GOTO="persistent_net_generator_end"
 # ignore Eucalyptus virtual interfaces
 ENV{MATCHADDR}=="d0:0d:*", GOTO="persistent_net_generator_end"
+# ignore Ravello Systems virtual interfaces
+ENV{MATCHADDR}=="2c:c2:60:*", GOTO="persistent_net_generator_end"
 
 # These vendors are known to violate the local MAC address assignment scheme
 # Interlan, DEC (UNIBUS or QBUS), Apollo, Cisco, Racal-Datacom