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><A
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>Network Interface Statistics</A
></H1
><P
>There are two network interface
statistics facilities: the general interface statistics, which
displays a statistical summary of all attached interfaces, and the
detailed interface statistics, which shows more statistical and
load information about a single selected interface.</P
><DIV
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><H1
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><A
NAME="GENSTATS"
>General Interface Statistics</A
></H1
><P
> The second menu option displays a list of
attached network interfaces, and some general
packet counts. Specifically, it displays counts of IP, non-IP, and bad
IP packets (packets with IP checksum errors). It also includes an
activity indicator, which shows the number of kilobits and packets the
interface sees per second. All figures are for incoming and outgoing
packets. (Again, considering promiscuous
mode for LAN interfaces, which simply causes the machine
to intercept all packets). This is useful for general monitoring
of all attached interfaces. If byte counts and
additional information are needed for a specific interface, the <I
CLASS="EMPHASIS"
>Detailed
interface statistics</I
> option is also available.</P
><P
> The activity indicators can be toggled between kbits/s and kbytes/s with
the <I
CLASS="EMPHASIS"
>Activity mode</I
> configuration option.</P
><P
> The general statistics window will dynamically add new entries
as packets from newly-created interfaces (e.g. new PPP interfaces) are
intercepted. Long lists can be scrolled with the Up, Down, PgUp, and
PgDn keys.</P
><P
>This monitor is affected by IPTraf's <A
HREF="filters.html"
>filters</A
> as described in Chapter 7.</P
><P
> Copies of the statistics are written to the log file
<TT
CLASS="FILENAME"
>iface_stats_general.log</TT
> at regular intervals if logging is
enabled. See the <I
CLASS="EMPHASIS"
>Logging</I
>
option int the <A
HREF="config.html"
>Configuration</A
> chapter.</P
><P
> This facility can be started directly from the command line with the
<B
CLASS="COMMAND"
>-g</B
> option to the <B
CLASS="COMMAND"
>iptraf</B
> command.
When started from the command line, the log filename and log interval can be
specified with the <TT
CLASS="COMPUTEROUTPUT"
>-L</TT
> and <TT
CLASS="COMPUTEROUTPUT"
>-I</TT
>
parameters respectively. See the <A
HREF="cmdline.html"
>Command-line Parameters</A
>
section above for more information.</P
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><P
><B
>Figure 1. The general interface statistics screen</B
></P
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> You can press X or Q to return to the main menu. </P
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