diff -r cdb94f2332a6 -r 61d1e1c3701a configs/common/FSConfig.py
--- a/configs/common/FSConfig.py	Fri Jul 01 10:37:57 2016 -0500
+++ b/configs/common/FSConfig.py	Sat Jul 16 11:55:31 2016 +0800
@@ -648,11 +648,16 @@
     return self
 
 
-def makeDualRoot(full_system, testSystem, driveSystem, dumpfile):
+def makeDualRoot(full_system,
+                 testSystem,
+                 driveSystem,
+                 linkspeed,
+                 linkdelay,
+                 dumpfile):
     self = Root(full_system = full_system)
     self.testsys = testSystem
     self.drivesys = driveSystem
-    self.etherlink = EtherLink()
+    self.etherlink = EtherLink(speed = linkspeed, delay = linkdelay)
 
     if hasattr(testSystem, 'realview'):
         self.etherlink.int0 = Parent.testsys.realview.ethernet.interface
diff -r cdb94f2332a6 -r 61d1e1c3701a configs/example/fs.py
--- a/configs/example/fs.py	Fri Jul 01 10:37:57 2016 -0500
+++ b/configs/example/fs.py	Sat Jul 16 11:55:31 2016 +0800
@@ -339,7 +339,12 @@
 test_sys = build_test_system(np)
 if len(bm) == 2:
     drive_sys = build_drive_system(np)
-    root = makeDualRoot(True, test_sys, drive_sys, options.etherdump)
+    root = makeDualRoot(True,
+                        test_sys,
+                        drive_sys,
+                        options.ethernet_linkspeed,
+                        options.ethernet_linkdelay,
+                        options.etherdump)
 elif len(bm) == 1 and options.dist:
     # This system is part of a dist-gem5 simulation
     root = makeDistRoot(test_sys,