diff --git a/FofbTool/Configuration.py b/FofbTool/Configuration.py
index a4ae4314f2ed8cfd5514ca2e4b86346bc8287c1e..22a33d081d3e58e9f6d0790073309301bb1c799d 100644
--- a/FofbTool/Configuration.py
+++ b/FofbTool/Configuration.py
@@ -258,7 +258,7 @@ def cellnode_configure_ccn(node_tangopath, nbpm, npsc):
     return True
 
 @trycatch_tango_devfailed
-def centralnode_configure_ccn(node_tangopath, nbpm, npsc):
+def centralnode_configure_ccn_w_gbe(node_tangopath, nbpm, npsc):
     """
     Configure the ComCellNode block on the centralnode.
     Automatically set the number of bpm/psc packets and MAC length.
@@ -286,9 +286,9 @@ def centralnode_configure_ccn(node_tangopath, nbpm, npsc):
         return None
 
     for n in range(len(nbpm)):
-        maclen = npsc*6+10
+        maclen = npsc*4+4
         logger.debug("Configure packeter {} framesize (mac length) to {}".format(n, maclen))
-        prx["ccnpack{}_framesize".format(n)] = maclen
+        prx["ccnethhead{}_framesize".format(n)] = maclen
 
         logger.debug("Configure packeter {}  npackets to {}".format(n, npsc-1))
         prx["ccnpack{}_npackets".format(n)] = npsc-1
diff --git a/FofbTool/__init__.py b/FofbTool/__init__.py
index e009633e3a704ad1babde09d2baabdf66a0bf55b..8535c77d940d2850f3c8f68a6de812f00959604d 100644
--- a/FofbTool/__init__.py
+++ b/FofbTool/__init__.py
@@ -14,4 +14,4 @@ This package is cut in several modules:
 For basic usage, see doc of FofbTool.Utils
 
 """
-__version__ = "3.5-dev"
+__version__ = "3.5.1-dev"