*/
private void sendHandshakeL2TableSet() {
OFVendor l2TableSet = (OFVendor)
BasicFactory.getInstance().getMessage(OFType.VENDOR);
l2TableSet.setXid(handshakeTransactionIds--);
OFBsnL2TableSetVendorData l2TableSetData =
new OFBsnL2TableSetVendorData(true,
controller.getCoreFlowPriority());
l2TableSet.setVendor(OFBigSwitchVendorData.BSN_VENDOR_ID);
l2TableSet.setVendorData(l2TableSetData);
l2TableSet.setLengthU(OFVendor.MINIMUM_LENGTH +
l2TableSetData.getLength());
channel.write(Collections.singletonList(l2TableSet));
}