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<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN"><HTML><HEAD><TITLE>Statistical Breakdowns</TITLE><METANAME="GENERATOR"CONTENT="Modular DocBook HTML Stylesheet Version 1.64"><LINKREL="HOME"TITLE="IPTraf User's Manual"HREF="manual.html"><LINKREL="PREVIOUS"TITLE="Detailed Interface Statistics"HREF="detstats.html"><LINKREL="NEXT"TITLE="TCP and UDP Traffic Statistics"HREF="servmon.html"></HEAD><BODYCLASS="CHAPTER"BGCOLOR="#FFFFFF"TEXT="#000000"LINK="#0000FF"VLINK="#840084"ALINK="#0000FF"><DIVCLASS="NAVHEADER"><TABLEWIDTH="100%"BORDER="0"CELLPADDING="0"CELLSPACING="0"><TR><THCOLSPAN="3"ALIGN="center">IPTraf User's Manual</TH></TR><TR><TDWIDTH="10%"ALIGN="left"VALIGN="bottom"><AHREF="detstats.html"><<< Previous</A></TD><TDWIDTH="80%"ALIGN="center"VALIGN="bottom"></TD><TDWIDTH="10%"ALIGN="right"VALIGN="bottom"><AHREF="servmon.html">Next >>></A></TD></TR></TABLE><HRALIGN="LEFT"WIDTH="100%"></DIV><DIVCLASS="CHAPTER"><H1><ANAME="STATBREAKDOWNS">Statistical Breakdowns</A></H1><P> Statistical breakdowns contain two facilities that break down traffic counts by either packet size or TCP/UDP port.</P><DIVCLASS="SECT1"><H1CLASS="SECT1"><ANAME="PKTSIZE">Packet Sizes</A></H1><P> The packet size breakdown facility used to be incorporated into the detailed interface statistics. It has since been moved to its own facility. It is entered by selecting <ICLASS="EMPHASIS">Statistical Breakdowns/By packet size</I>.</P><P> The packet size breakdown takes the interface's Maximum Transmission Unit (MTU) size and divides it into 20 brackets, each bracket containing a range of sizes. As a packet is captured, its size is determined and the appropriate bracket is incremented.</P><P> This facility provides an idea as to the packet sizes passing over your network, and can aid in network (re)design decisions.</P><DIVCLASS="FIGURE"><ANAME="AEN1146"></A><P><IMGSRC="iptraf-pktsize.png"></P><P><B>Figure 1. The packet size statistical breakdown</B></P></DIV><P> If logging is enabled, copies of the statistics are written at regular intervals to a log file. The default log file name is <TTCLASS="FILENAME">packet_size-<TTCLASS="REPLACEABLE"><I>iface</I></TT>.log</TT> where <TTCLASS="REPLACEABLE"><I>iface</I></TT> is the selected interface for this session (for example, <TTCLASS="FILENAME">packet_size-eth0.log</TT>).</P><P>IPTraf's filters do not affect this facility.</P><P> The packet size breakdown can also be invoked straight from the command line by specifying the <TTCLASS="COMPUTEROUTPUT">-z</TT> iface parameter. The interface parameter is required. For example, this command runs the facility on interface <TTCLASS="FILENAME">eth0</TT>.</P><TABLEBORDER="0"BGCOLOR="#E0E0E0"WIDTH="100%"><TR><TD><PRECLASS="SYNOPSIS">iptraf -z eth0</PRE></TD></TR></TABLE><P> To exit, press X or Ctrl+X.</P></DIV></DIV><DIVCLASS="NAVFOOTER"><HRALIGN="LEFT"WIDTH="100%"><TABLEWIDTH="100%"BORDER="0"CELLPADDING="0"CELLSPACING="0"><TR><TDWIDTH="33%"ALIGN="left"VALIGN="top"><AHREF="detstats.html"><<< Previous</A></TD><TDWIDTH="34%"ALIGN="center"VALIGN="top"><AHREF="manual.html">Home</A></TD><TDWIDTH="33%"ALIGN="right"VALIGN="top"><AHREF="servmon.html">Next >>></A></TD></TR><TR><TDWIDTH="33%"ALIGN="left"VALIGN="top">Detailed Interface Statistics</TD><TDWIDTH="34%"ALIGN="center"VALIGN="top"> </TD><TDWIDTH="33%"ALIGN="right"VALIGN="top">TCP and UDP Traffic Statistics</TD></TR></TABLE></DIV></BODY></HTML>⌨️ 快捷键说明
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