-- binary
04 06 # version, type
00 20 # length
12 34 56 78 # xid
fe dc ba 98 76 54 32 10 # datapath_id
00 00 00 40 # n_buffers
c8 # n_tables
05 # auxiliary_id
00 00 # pad
00 00 01 01 # capabilities
00 00 00 00 # reserved
-- python
ofp.message.features_reply(
    xid=0x12345678,
    datapath_id=0xFEDCBA9876543210,
    n_buffers=64,
    n_tables=200,
    auxiliary_id=5,
    capabilities=ofp.OFPC_FLOW_STATS|ofp.OFPC_PORT_BLOCKED,
    reserved=0)