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><H1
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><A
NAME="DETSTATS"
>Detailed Interface Statistics</A
></H1
><P
>  The third menu option displays packet statistics for any
  selected interface. It provides basically the same information
  as the <I
CLASS="EMPHASIS"
>General interface statistics</I
>
   option, with additional details.
  This facility provides the following information:</P
><P
></P
><UL
COMPACT="COMPACT"
><LI
STYLE="list-style-type: disc"
><P
>   Total packet and byte counts</P
></LI
><LI
STYLE="list-style-type: disc"
><P
>   IP packet and byte counts</P
></LI
><LI
STYLE="list-style-type: disc"
><P
>   TCP packet and byte counts</P
></LI
><LI
STYLE="list-style-type: disc"
><P
>   UDP packet and byte count</P
></LI
><LI
STYLE="list-style-type: disc"
><P
>   ICMP packet and byte counts</P
></LI
><LI
STYLE="list-style-type: disc"
><P
>   Other IP-type packet and byte counts</P
></LI
><LI
STYLE="list-style-type: disc"
><P
>   Non-IP packet and byte counts</P
></LI
><LI
STYLE="list-style-type: disc"
><P
>   Checksum error count</P
></LI
><LI
STYLE="list-style-type: disc"
><P
>   Interface activity</P
></LI
><LI
STYLE="list-style-type: disc"
><P
>    Broadcast packet and byte counts</P
></LI
></UL
><P
>  All IP byte counts (IP, TCP, UDP, ICMP, other IP) include IP header data
  and payload. The data link header is not included. The full frame length
  (including data-link header) is included in the non-IP and Total
  byte count.  All data-link headers are also included in the Total byte
  counts.</P
><DIV
CLASS="FIGURE"
><A
NAME="AEN1145"
></A
><P
><IMG
SRC="iptraf-dstat1.png"></P
><P
><B
>Figure 2. The detailed interface statistics screen</B
></P
></DIV
><P
> The upper portion of the screen
  contains the packet and byte counts for all IP and
  non-IP packets intercepted on the interface. The lower portion
  contains the total, incoming, and outgoing interface data rates.</P
><P
>  This facility also displays incoming and outgoing counts and data rates.
  The packet size breakdown in versions prior to 2.0.0 has been moved
  to its own facility under <I
CLASS="EMPHASIS"
>Statistical breakdowns.../By packet
  size</I
> as described in <A
HREF="statbreakdowns.html#PKTSIZE"
>Chapter 5</A
>.</P
><P
>  An outgoing packet is one that exits your interface, regardless
  of whether it originated from your machine or came
  from another machine and was routed through yours. An incoming packet is
  one that enters your interface, either addressed
  to you directly, broadcast, multicast, or captured promiscuously.</P
><P
>  The rate indicators can be set to display kbits/s or kbytes/s with the
  <I
CLASS="EMPHASIS"
>Activity mode</I
> configuration option.</P
><DIV
CLASS="NOTE"
><P
></P
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><B
>Note</B
></TH
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><TR
><TD
>&nbsp;</TD
><TD
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><P
>  Buffering and some other factors may affect the data rates, notably
  the outgoing rate, causing it to reflect a higher figure than the actual
  rate at which the interface is sending.</P
></TD
></TR
></TABLE
></DIV
><P
>  The figures are logged at regular intervals if logging is enabled. The
  default log file name at the prompt is
  <TT
CLASS="FILENAME"
>iface_stats_detailed-<TT
CLASS="REPLACEABLE"
><I
>iface</I
></TT
>.log</TT
>
  where iface is the selected interface for this session (for example,
  <TT
CLASS="FILENAME"
>iface_stats_detailed-eth0.log</TT
>).</P
><P
>  If you wish to start this facility directly
  from the command line, you can specify the
<TT
CLASS="COMPUTEROUTPUT"
>-d</TT
> parameter and an interface
  to monitor. For example,</P
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><TD
><PRE
CLASS="SYNOPSIS"
>iptraf -d eth0</PRE
></TD
></TR
></TABLE
><P
>  starts the statistics for <TT
CLASS="FILENAME"
>eth0</TT
>. The interface must be specified, or
  IPTraf will not start the facility.</P
><P
>  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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><B
>Note</B
></TH
></TR
><TR
><TD
>&nbsp;</TD
><TD
ALIGN="LEFT"
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><P
>  In both the general and detailed statistics screens, as well as
  in the IP traffic monitor, the packet counts are for
  actual network packets (layer 2), not the logical IP packets (layer 3)
  that may be reconstructed after fragmentation. That means, if a
  packet was fragmented into four pieces, and these four fragments pass
  over your interface, the packet counts will indicate four separate
  packets.
  </P
></TD
></TR
></TABLE
></DIV
><P
>  The figure for the IP checksum errors is a packet count only, because the
  corrupted IP header cannot be relied upon to give a correct IP
  packet length value.</P
><P
> This facility's output is also affected by IPTraf's <A
HREF="filters.html"
>filters</A
>.  See Chapter 7 for more information
on filters.</P
><P
>  Pressing X or Q takes you back to the main menu (if this
  facility was started with the command-line option, X or Q drops you back
  to the shell).</P
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