PPPSTATS(8)		    System Manager's Manual		   PPPSTATS(8)



NAME
       pppstats - print PPP statistics

SYNOPSIS
       pppstats	 [  -a	]  [ -v ] [ -r ] [ -z ] [ -c <count> ] [ -w <secs> ] [
       interface ]

DESCRIPTION
       The pppstats utility reports PPP-related statistics at  regular	inter-
       vals for the specified PPP interface.  If the interface is unspecified,
       it will default to ppp0.	 The display is split horizontally into	 input
       and  output  sections  containing  columns of statistics describing the
       properties and volume of packets received and transmitted by the inter-
       face.

       The options are as follows:

       -a     Display  absolute	 values rather than deltas.  With this option,
	      all reports show statistics for the time since the link was ini-
	      tiated.	Without this option, the second and subsequent reports
	      show statistics for the time since the last report.

       -c count
	      Repeat the display count times.  If this option  is  not	speci-
	      fied,  the  default  repeat  count  is 1 if the -w option is not
	      specified, otherwise infinity.

       -r     Display additional statistics summarizing the compression	 ratio
	      achieved by the packet compression algorithm in use.

       -v     Display additional statistics relating to the performance of the
	      Van Jacobson TCP header compression algorithm.

       -w wait
	      Pause wait seconds between each display.	If this option is  not
	      specified, the default interval is 5 seconds.

       -z     Instead  of the standard display, show statistics indicating the
	      performance of the packet compression algorithm in use.

       The following fields are printed on the input side when the  -z	option
       is not used:

       IN     The total number of bytes received by this interface.

       PACK   The total number of packets received by this interface.

       VJCOMP The  number  of  header-compressed  TCP packets received by this
	      interface.

       VJUNC  The number of header-uncompressed TCP packets received  by  this
	      interface.  Not reported when the -r option is specified.

       VJERR  The  number  of corrupted or bogus header-compressed TCP packets
	      received by this interface.  Not reported when the -r option  is
	      specified.

       VJTOSS The number of VJ header-compressed TCP packets dropped on recep-
	      tion by  this  interface	because	 of  preceding	errors.	  Only
	      reported when the -v option is specified.

       NON-VJ The  total number of non-TCP packets received by this interface.
	      Only reported when the -v option is specified.

       RATIO  The compression ratio  achieved  for  received  packets  by  the
	      packet  compression  scheme  in use, defined as the uncompressed
	      size divided by the compressed size.  Only reported when the  -r
	      option is specified.

       UBYTE  The  total number of bytes received, after decompression of com-
	      pressed packets.	Only reported when the -r option is specified.

       The following fields are printed on the output side:

       OUT    The total number of bytes transmitted from this interface.

       PACK   The total number of packets transmitted from this interface.

       VJCOMP The number of TCP packets transmitted from this  interface  with
	      VJ-compressed TCP headers.

       VJUNC  The  number  of TCP packets transmitted from this interface with
	      VJ-uncompressed TCP headers.  Not reported when the -r option is
	      specified.

       NON-VJ The total number of non-TCP packets transmitted from this inter-
	      face.  Not reported when the -r option is specified.

       VJSRCH The number of searches for the cached  header  entry  for	 a  VJ
	      header  compressed TCP packet.  Only reported when the -v option
	      is specified.

       VJMISS The number of failed searches for the cached header entry for  a
	      VJ  header  compressed  TCP  packet.   Only reported when the -v
	      option is specified.

       RATIO  The compression ratio achieved for transmitted  packets  by  the
	      packet  compression  scheme  in  use, defined as the size before
	      compression divided by the compressed size.  Only reported  when
	      the -r option is specified.

       UBYTE  The  total number of bytes to be transmitted, before packet com-
	      pression is applied.  Only reported when the -r option is speci-
	      fied.

       When the -z option is specified, instead displays the following fields,
       relating to the packet compression  algorithm  currently	 in  use.   If
       packet compression is not in use, these fields will all display zeroes.
       The fields displayed on the input side are:

       COMPRESSED BYTE
	      The number of bytes of compressed packets received.

       COMPRESSED PACK
	      The number of compressed packets received.

       INCOMPRESSIBLE BYTE
	      The number of bytes of incompressible packets  (that  is,	 those
	      which were transmitted in uncompressed form) received.

       INCOMPRESSIBLE PACK
	      The number of incompressible packets received.

       COMP RATIO
	      The  recent  compression	ratio for incoming packets, defined as
	      the uncompressed size divided by the compressed size  (including
	      both compressible and incompressible packets).

       The fields displayed on the output side are:

       COMPRESSED BYTE
	      The number of bytes of compressed packets transmitted.

       COMPRESSED PACK
	      The number of compressed packets transmitted.

       INCOMPRESSIBLE BYTE
	      The  number of bytes of incompressible packets transmitted (that
	      is, those which were transmitted in uncompressed form).

       INCOMPRESSIBLE PACK
	      The number of incompressible packets transmitted.

       COMP RATIO
	      The recent compression ratio for outgoing packets.

SEE ALSO
       pppd(8)



				 26 June 1995			   PPPSTATS(8)