PPPSTATS(1M) Maintenance Commands PPPSTATS(1M)


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,
pppstats defaults to sppp0. 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.

OPTIONS


The pppstats options are:

-a
Display absolute values rather than deltas. With this
option, all reports show statistics for the time elapsed
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 five seconds.


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


EXTENDED DESCRIPTION


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

IN
Total number of bytes received by this interface.


PACK
Total number of packets received by this interface.


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


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


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


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


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


RATIO
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
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
Total number of bytes transmitted from this interface.


PACK
Total number of packets transmitted from this interface.


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


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


NON-VJ
Total number of non-TCP packets transmitted from this
interface. Not reported when the -r option is specified.


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


VJMISS
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
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
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 displays the following fields
relating to the packet compression algorithm currently in use. If packet
compression is not in use, these fields display zeroes. The fields
displayed on the input side are:

COMPRESSED BYTE
Number of bytes of compressed packets received.


COMPRESSED PACK
Number of compressed packets received.


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


INCOMPRESSIBLE PACK
Number of incompressible packets received.


COMP RATIO
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
Number of bytes of compressed packets transmitted.


COMPRESSED PACK
Number of compressed packets transmitted.


INCOMPRESSIBLE BYTE
Number of bytes of incompressible packets
received; that is, those that were transmitted by
the peer in uncompressed form.


INCOMPRESSIBLE PACK
Number of incompressible packets transmitted.


COMP RATIO
Recent compression ratio for outgoing packets.


ATTRIBUTES


See attributes(5) for descriptions of the following attributes:


+--------------------+-----------------+
| ATTRIBUTE TYPE | ATTRIBUTE VALUE |
+--------------------+-----------------+
|Interface Stability | Evolving |
+--------------------+-----------------+

SEE ALSO


pppd(1M), attributes(5)


May 4, 2001 PPPSTATS(1M)