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Linux 2.6 - man page for pppstats (linux section 8)

PPPSTATS(8)									      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 intervals 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 interface.

       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 initiated.  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  specified,  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 reception by this inter-
	      face 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 compressed 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 interface.  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  com-
	      pressed 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 compression is applied.
	      Only reported when the -r option is specified.

       When the -z option is specified, pppstats 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	transmit-
	      ted 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)


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