@param context - sender context, to match reply w/ request
@param bi_tbl_id - The BIER table-id used to forward post encap
@param bi_src - The source Bit-position in the encap.
@param context - sender context, to match reply w/ request
@param bi_tbl_id - The BIER table-id used to forward post encap
@param bi_src - The source Bit-position in the encap.