RECORD NF_HDRV1_RECORD USING
 1 NF_HDRV1 .
  2 NF_HDR_W_VERSION USAGE IS WORD.     ! Current version=1
  2 NF_HDR_W_COUNT USAGE IS WORD.       ! The number of records in PDU.
  2 NF_HDR_L_UPTIME USAGE IS LONG.      ! Current time in msecs since router booted.
  2 NF_HDR_L_SECS USAGE IS LONG.        ! Current seconds since 0000 UTC 1970
  2 NF_HDR_L_NSECS USAGE IS LONG. ;