PPPSTATS(8) BSD System Manager's Manual PPPSTATS(8)NAMEpppstats — print PPP statistics
SYNOPSISpppstats [-arvz] [-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 proper‐
ties 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 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 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 secs
Pause secs 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 com‐
pression 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, 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 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 com‐
pressed size (including both compressible and incom‐
pressible packets).
The fields displayed on the output side are:
COMPRESSED BYTE The number of bytes of compressed packets transmit‐
ted.
COMPRESSED PACK The number of compressed packets transmitted.
INCOMPRESSIBLE BYTE The number of bytes of incompressible packets trans‐
mitted (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 ALSOpppd(8)BSD June 26, 1995 BSD
