pppstat(1M) pppstat(1M)
pppstat - Point-to-Point Protocol (PPP) Status
pppstat [-n] [-u unit] [-i interval] [-m d|r|z]
pppstat displays the current status of PPP links. Both configuration
values (e.g. IP addresses, protocols, and packet sizes) and operational
values (e.g. recent compression performance, corrupted packets, and
current links in the multilink bundle) are displayed.
The options are:
-n display numbers instead of names.
-u unit
display the stat of PPP unit unit instead of the first active unit.
-i interval
refresh the screen every interval seconds instead of once per
second.
-m d|r|z
display using d or delta mode (changes since last screen update), r
or reset mode or values since link start, or z or zeroed mode or
values since last zeroed.
The current status of a PPP link is displayed on seven screens. The
first four or "link" screens indicate what is happening on one of the
links in a multilink bundle. The fifth or "I/O" screen displays input
and output status and counts for the overall multilink bundle. The sixth
displays accounting information, such as how long the links in the bundle
have been active and how many phone calls have been attempted. The
seventh displays various generally uninteresting values, such as the next
multilink serial number and how often the type-of-service (TOS) queuing
mechanisms have been invoked.
pppstat accepts single-character commands while it is running. Single
digits select the corresponding screen. Plus (+) and minus (-) select
the previous or next active interface or unit. The letters "D", "Z", and
"R" select "delta" (changes since last screen update), "zeroed" (values
since last "Z"), and "reset modes" (values since link start).
After the configuration has been checked (e.g. IP addresses) the most
important or at least commonly monitored values are the number of packets
with bad FCS in screens 1-4, the current bit rates in screen 5, and the
number of links in the bundle and PPP processes adding links in screen 6.
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pppstat(1M) pppstat(1M)
Screens 1-4
The per-link screens are empty when the corresponding link in the
multilink bundle is not active. When a link is active, its screen
includes information about:
peer:
the Ident string received from the peer, which for IRIX includes
information about the hardware and software.
link type,
whether synchronous or asynchronous, and whether the phone call was
answered or originated.
raw input and output
in total bytes.
link rate
in bits per second if know and not inferred (e.g. specified in
control file).
RTT or measured round-trip-time.
MRU, MTU, MRRU, MTRU
or maximum transmit and receive unit (packet) sizes and reassembled
unit (multilink packet) sizes.
bad packets
or packets discarded because with bad checksums (FCS), insufficient
buffer memory (no buf), too small to contain a packet (tiny),
aborted by the peer, too long, or ridiculously long babble frames.
Note that when using a modem, null frames are often sent before
packet after a link has been idle to minimize the effects of line
noise.
compression
various internal values of the data and header (or "VJ") compression
machinery are displayed on the bottom of the screens 1-4
The I/O screen contains general input/output information, including:
input and output
counts of the raw or compressed bytes moved and the number of bytes
of IP packets. Note that without compression, the number of raw
bytes is more than the number of IP bytes. The recent input and
output bit rates are displayed along with an indication of whether
those rates appeared to the PPP system medium or high compared to
the capacity of the multilink bundle.
available and previous
bits per second of the overall multilink bundle as estimated by the
PPP system are displayed below the measured rates.
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pppstat(1M) pppstat(1M)
compression
When compression is done "above" the multilink bundle, so that the
per-link compression is the same as the compression of the entire
bundle, the bottom of screen 5 contains information about the
compression machinery like that found on screens 1-4.
The accounting screen tells about the number of phone calls, their
duration, and what the machinery is doing about adding or removing links.
/tmp/.ppp-rendezvous rendezvous with PPP daemons
ppp(1m)
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