anchor.diff:      ping/1,
       forward_mod/3,
       forward_mod/4,
  -    oe_forward_mod_eth_to_optical/5,
  -    oe_forward_mod_between_optical/6,
  -    oe_forward_mod_optical_to_eth/5,
  +    oe_flow_tw/5,
  +    oe_flow_ww/6,
  +    oe_flow_wt/5,
       bridge/3,
       bridge/4,
       clear_flows0/0,
  
positive.code:     Request = of_msg_lib:flow_add(Version, Matches, Instructions, Opts),
      send(Key, Request).
  
  oe_forward_mod_optical_to_eth(Key, Priority, InPort, InChannelNumber,
                                OutPort) ->
      Version = version(Key),
      Matches = [{in_port, <<InPort:32>>},
                 {och_sigtype, ?OCH_SIGTYPE},
  
negative.code:     Request = of_msg_lib:flow_add(Version, Matches, Instructions, Opts),
      send(Key, Request).
  
  %% @doc
  %% Forward all packets from a WPort InPort on InChannelNumber
  %% to a WPort OutPort
  %% on the switch associated
  %% with Key assigning ChannelNumber to the OutPort data.  Flows
  %% are installed in table 0 with priority Priority.
  %% If Key is ``default'', send forward mod to the default switch.
  %% @end
  oe_flow_ww(Key, Priority, InPort, InChannelNumber, OutPort, OutChannelNumber) ->
      Version = version(Key),
      Matches = [{in_port, <<InPort:32>>},
                 {och_sigtype, ?OCH_SIGTYPE},
  