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    <HTML> 
	<HEAD> 
	    <TITLE>Multi Router Traffic Grapher -- Configuration File Format</TITLE> 
	</HEAD>

	<BODY BGCOLOR="#FFFFFF" TEXT="#000000" LINK="#990200" VLINK="#006342" >

<!-- INDEX BEGIN -->

<UL>

	<LI><A HREF="#Multi_Router_Traffic_Grapher_">Multi Router Traffic Grapher - Configuration File Format</A>
	<LI><A HREF="#Global_Configuration">Global Configuration </A>
	<LI><A HREF="#Optional_Global_Parameters">Optional Global Parameters</A>
	<UL>

		<LI><A HREF="#Refresh">Refresh</A>
		<LI><A HREF="#Interval">Interval</A>
		<LI><A HREF="#WriteExpires">WriteExpires</A>
		<LI><A HREF="#IconDir">IconDir</A>
	</UL>

	<LI><A HREF="#Configuration_for_each_Target_yo">Configuration for each Target you want to monitor</A>
	<UL>

		<LI><A HREF="#Target">Target</A>
		<LI><A HREF="#RouterUptime">RouterUptime</A>
		<LI><A HREF="#MaxBytes">MaxBytes</A>
		<LI><A HREF="#Title">Title </A>
		<LI><A HREF="#PageTop">PageTop</A>
	</UL>

	<LI><A HREF="#Optional_Target_Configuration_Ta">Optional Target Configuration Tags</A>
	<UL>

		<LI><A HREF="#AddHead">AddHead</A>
		<LI><A HREF="#AbsMax">AbsMax </A>
		<LI><A HREF="#Unscaled">Unscaled</A>
		<LI><A HREF="#WithPeak">WithPeak</A>
		<LI><A HREF="#Supress">Supress</A>
		<LI><A HREF="#Directory">Directory</A>
		<LI><A HREF="#XSize_and_YSize">XSize and YSize</A>
		<LI><A HREF="#XZoom_YZoom">XZoom YZoom</A>
		<LI><A HREF="#XScale_YScale">XScale YScale</A>
		<LI><A HREF="#Step">Step</A>
		<LI><A HREF="#Options">Options</A>
		<LI><A HREF="#Colours">Colours</A>
		<LI><A HREF="#Background">Background</A>
		<LI><A HREF="#YLegend_ShortLegend_Legend_123">YLegend, ShortLegend, Legend[1234]</A>
		<LI><A HREF="#Timezone">Timezone</A>
		<LI><A HREF="#Weekformat">Weekformat</A>
	</UL>

	<LI><A HREF="#Two_very_special_Target_names">Two very special Target names</A>
	<LI><A HREF="#Some_example_mrtg_cfg_files">Some example mrtg.cfg files</A>
	<UL>

		<LI><A HREF="#Minimal_mrtg_cfg">Minimal mrtg.cfg</A>
		<LI><A HREF="#Minimal_Cfg_for_several_Routers_">Minimal Cfg for several Routers.</A>
	</UL>

</UL>
<!-- INDEX END -->

<HR>
<img src="http://ee-staff.ethz.ch/~oetiker/webtools/mrtg/mrtg-ti.gif">

<P>
<HR>
<H1><A NAME="Multi_Router_Traffic_Grapher_">Multi Router Traffic Grapher -- Configuration File Format

</A></H1>
This file is for use with mrtg-2.0


<P>

Note:


<P>

<UL>
<LI><STRONG></STRONG>
Keywords must start at the begin of a line.


<P>

<LI><STRONG></STRONG>
Lines which follow a keyword line which do start with a blank are appended
to the keyword line


<P>

<LI><STRONG></STRONG>
Empty Lines are ignored


<P>

<LI><STRONG></STRONG>
Lines starting with a # sign are comments.


<P>

</UL>
<P>
<HR>
<H1><A NAME="Global_Configuration">Global Configuration 

</A></H1>
Workdir specifies where the logfiles and the webpages should be created.


<P>

Example:


<P>

<PRE> WorkDir: /usr/tardis/pub/www/stats/mrtg
</PRE>

<P>

<P>
<HR>
<H1><A NAME="Optional_Global_Parameters">Optional Global Parameters

</A></H1>
<P>
<HR>
<H2><A NAME="Refresh">Refresh

</A></H2>
How many seconds apart should the browser (Netscape) be instructed to
reload the page? If this is not defined, the default is 300 seconds (5
minutes).


<P>

Example:


<P>

<PRE> Refresh: 600
</PRE>

<P>

<P>
<HR>
<H2><A NAME="Interval">Interval

</A></H2>
How often do you call mrtg? The default is 5 minutes. If you call it less
often, you should specify it here. This does two things:


<P>

<UL>
<LI><STRONG></STRONG>
the generated HTML page does contain the right information about the
calling interval ...


<P>

<LI><STRONG></STRONG>
a META header in the generated HTML page will instruct caches about the
time to live of this page .....


<P>

</UL>
In this example we tell mrtg that we will be calling it every 10 minutes.
If you are calling mrtg every 5 minutes, you can leave this line commented
out.


<P>

Example:


<P>

<PRE> Interval: 10
</PRE>

<P>

<P>
<HR>
<H2><A NAME="WriteExpires">WriteExpires

</A></H2>
With this switch mrtg will generate .meta files for CERN and Apache servers
which contain Expiration tags for the html and gif files. The *.meta files
will be created in the same directory as the other files, so you might have
to set ``MetaDir .'' in your srm.conf file for this to work


<P>

NOTE: If you are running Apache-1.2 you can use the mod_expire to achieve
the same effect ... see the file htaccess-dist


<P>

Example:


<P>

<PRE> WriteExpires: Yes
</PRE>

<P>

<P>
<HR>
<H2><A NAME="IconDir">IconDir

</A></H2>
If you want to keep the mrtg icons in some place other than the working
directory, use the IconDir varibale to give its url.


<P>

Example:


<P>

<PRE> IconDir: /mrtgicons/
</PRE>

<P>

<P>
<HR>
<H1><A NAME="Configuration_for_each_Target_yo">Configuration for each Target you want to monitor

</A></H1>
The configuration keywords ``Target'' must be followed by a unique name.
This will also be the name used for the webpages, logfiles and gifs created
for that target.


<P>

Note that the ``Target'' sections can be auto-generated with the <STRONG>cfgmaker</STRONG> tool. Check <EM>readme.html</EM> for instructions.


<P>

<P>
<HR>
<H2><A NAME="Target">Target

</A></H2>
With the ``Target'' keyword you tell mrtg what it should monitor. The
``Target'' keyword takes arguments in a wide range of formats:


<P>

<UL>
<LI><STRONG></STRONG>
The most basic format is ``port:community@router'' This will generate a
traffic graph for port 'port' of the router 'router' and it will use the
community 'community' for the snmp query.


<P>

Example:


<P>

<PRE> Target[ezwf]: 2:public@wellfleet-fddi.ethz.ch
</PRE>

<P>

<LI><STRONG></STRONG>
Sometimes you are sitting on the wrong side of the link. And you would like
to have mrtg report Incoming traffic as outgoing and visa versa. This can
be achieved by adding the '-' sign in front of the ``Target'' description.
It flips the in and outgoing traffic rates.


<P>

Example:


<P>

<PRE> Target[ezci]: -1:public@ezci-ether.ethz.ch
</PRE>

<P>

<LI><STRONG></STRONG>
You can also explicitly define the OID to query by using the following
syntax 'OID_1&amp;OID_2:community@router' The following example will
retrieve error input and output octets/sec on interface 1. MRTG needs to
graph two values, so you need to specify two OID's such as temperature and
humidity or error input and error output.


<P>

Example:


<P>

<PRE> Target[ezwf]: 1.3.6.1.2.1.2.2.1.14.1&amp;1.3.6.1.2.1.2.2.1.20.1:public@myrouter
</PRE>

<P>

<LI><STRONG></STRONG>
mrtg knows a number of symbolical SNMP variable names. See the file
mibhelp.txt for a list of known names. One example are the ifInErrors and
and ifOutErrors names. This means you can specify the above as:


<P>

Example:


<P>

<PRE> Target[ezwf]: ifInErrors.1&amp;ifOutErrors.1:public@myrouter
</PRE>

<P>

<LI><STRONG></STRONG>
if you want to monitor something which does not provide data via snmp you
can use some external program to do the data gathering.


<P>

The external command must return 4 lines of output:


<P>

<DL>
<DT><STRONG><A NAME="item_Line">Line 1

</A></STRONG><DD>
current state of the 'incoming bytes counter'


<P>

<DT><STRONG>Line 2

</A></STRONG><DD>
current state of the 'outgoing bytes counter'
   


<P>

<DT><STRONG>Line 3

</A></STRONG><DD>
string, telling the uptime of the target.


<P>

<DT><STRONG>Line 4

</A></STRONG><DD>
string, telling the name of the target. 


<P>

</DL>
Depending on the type of data your script returns you might want to use the
'gauge' or 'absolute' arguments for the ``Options'' keyword.


<P>

Example:


<P>

<PRE> Target[ezwf]: `/usr/local/bin/df2mrtg /dev/dsk/c0t2d0s0`
</PRE>

<P>

<LI><STRONG></STRONG>
You can also use several statements in a mathematical expression. This
could be used to aggregate both B channels in an ISDN connection or
multiple T1's that are aggregated into a single channel for greater
bandwidth. Note the whitespace arround the target definitions.


<P>

Example:


<P>

<PRE> Target[ezwf]: 2:public@wellfleetA + 1:public@wellfleetA
              * 4:public@ciscoF
</PRE>

<P>

</UL>
<P>
<HR>
<H2><A NAME="RouterUptime">RouterUptime

</A></H2>
In cases where you calculate the used bandwidth from several interfaces you
normaly don't get the routeruptime and routername displayed on the web
page.


<P>

If this interface are on the same router and the uptime and name should be
displayed nevertheless you have to specify its community and address again
with the RouterUptime keyword.


<P>

Example:


<P>

<PRE> Target[kacisco]: 1:public@194.64.66.250 + 2:public@194.64.66.250
 RouterUptime[kacisco]: public@194.64.66.250
</PRE>

<P>

<P>
<HR>
<H2><A NAME="MaxBytes">MaxBytes

</A></H2>
How many bytes per second can this port carry. Since most links are rated
in bits per second, you need to divide their maximum bandwidth (in bits) by
eight (8) in order to get bytes per second. This is very important to make
your unscaled graphs display realistic information. T1 = 193000, 56K =
7000, Ethernet = 1250000. The ``MaxBytes'' value will be used by mrtg to
decide whether it got a valid response from the router. If a number higher
than ``MaxBytes'' is returned, it is ignored. Also read the section on
AbsMax for further info.


<P>

Example:


<P>

<PRE> MaxBytes[ezwf]: 1250000
</PRE>

<P>

<P>
<HR>
<H2><A NAME="Title">Title 

</A></H2>
Title for the HTML page which gets generated for the graph.


<P>

Example:


<P>

<PRE> Title[ezwf]: Traffic Analysis for Arnes
</PRE>

<P>

<P>
<HR>
<H2><A NAME="PageTop">PageTop

</A></H2>
Things to add to the top of the generated HTML page. Note that you can have
several lines of text as long as the first column is empty.


<P>

Note that the continuation lines will all end up on the same line in the
html page. If you want linebreaks in the generated html use the '\n'
sequence.


<P>

Example:


<P>

<PRE> PageTop[ezwf]: &lt;H1&gt;Traffic Analysis for ETZ C95.1&lt;/H1&gt;
  Our Campus Backbone runs over an FDDI line\n
  with a maximum transfer rate of 12.5 Mega Bytes per
  Second.
</PRE>

<P>

<P>
<HR>
<H1><A NAME="Optional_Target_Configuration_Ta">Optional Target Configuration Tags

</A></H1>
<P>
<HR>
<H2><A NAME="AddHead">AddHead

</A></H2>
Use this tag like the PageTop header, but its contents will be added
between &lt;/TITLE&gt; and &lt;/HEAD&gt;.


<P>

Example:


<P>

<PRE> AddHead[ezwf]: &lt;!-- Just a comment for fun --&gt;
</PRE>

<P>

<P>
<HR>
<H2><A NAME="AbsMax">AbsMax 

</A></H2>
If you are monitoring a link which can handle more traffic than the
MaxBytes value. Eg, a line which uses compression or some frame relay link,
you can use the AbsMax keyword to give the absolute maximum value ever to
be reached. We need to know this in order to sort out unrealistic values
returned by the routers. If you do not set absmax, rateup will ignore
values higher then MaxBytes.


<P>

Example:


<P>

<PRE> AbsMax[ezwf]: 2500000
</PRE>

<P>

<P>
<HR>
<H2><A NAME="Unscaled">Unscaled

</A></H2>
By default each graph is scaled vertically to make the actual data visible
even when it is much lower than MaxBytes. With the ``Unscaled'' variable
you can supress this. It's argument is a string, containing one letter for
each graph you don't want to be scaled: d=day w=week m=month y=year. In the
example I supress scaling for the yearly and the monthly graph.


<P>

Example:


<P>

<PRE> Unscaled[ezwf]: ym
</PRE>

<P>

<P>
<HR>
<H2><A NAME="WithPeak">WithPeak

</A></H2>
By default the graphs only contain the average transfer rates for incoming
and outgoing traffic. The following option instructs mrtg to display the
peak 5 minute transfer rates in the [w]eekly, [m]onthly and [y]early graph.
In the example we define the monthly and the yearly graph to contain peak
as well as average values.


<P>

Examples:


<P>

<PRE> WithPeak[ezwf]: ym
</PRE>

<P>

<P>
<HR>
<H2><A NAME="Supress">Supress

</A></H2>
By Default mrtg produces 4 graphs. With this option you can supress the
generation of selected graphs. The format is analog to the above option. In
this example we supress the yearly graph as it is quite empty in the
beginning.


<P>

Example:


<P>

<PRE> Supress[ezwf]: y
</PRE>

<P>

<P>
<HR>
<H2><A NAME="Directory">Directory

</A></H2>
By default, mrtg puts all the files that it generates for each router (the
GIFs, the HTML page, the log file, etc.) in WorkDir.


<P>

If the ``Directory'' option is specified, the files are instead put into a
directory under WorkDir. (For example, given the options in this
mrtg.cfg-dist file, the ``Directory'' option below would cause all the ezwf
files to be put into /usr/tardis/pub/www/stats/mrtg/ezwf .)


<P>

The directory must already exist; mrtg will not create it.


<P>

Example:


<P>

<PRE> Directory[ezwf]: ezwf
</PRE>

<P>

<P>
<HR>
<H2><A NAME="XSize_and_YSize">XSize and YSize

</A></H2>
By Default mrtgs graphs are 100 by 400 pixels wide (plus some more for the
labels. In the example we get almost square graphs ...


<P>

Note: XSize must be between 20 and 600 YSize must be larger than 20


<P>

Example:


<P>

<PRE> XSize[ezwf]: 300
 YSize[ezwf]: 300
</PRE>

<P>

<P>
<HR>
<H2><A NAME="XZoom_YZoom">XZoom YZoom

</A></H2>
If you want your graphs to have larger pixels, you can ``Zoom'' them.


<P>

Example:


<P>

<PRE> XZoom[ezwf]: 2.0
 YZoom[ezwf]: 2.0
</PRE>

<P>

<P>
<HR>
<H2><A NAME="XScale_YScale">XScale YScale

</A></H2>
If you want your graphs to be actually scaled use XScale and YScale.
(Beware while this works, the results look ugly (to be frank) so if someone
wants fix this: patches are welcome.


<P>

Example:


<P>

<PRE> XScale[ezwf]: 1.5
 YScale[ezwf]: 1.5
</PRE>

<P>

<P>
<HR>
<H2><A NAME="Step">Step

</A></H2>
Change the default step with from 5 * 60 seconds to something else (I have
not tested this well ...)


<P>

Example:


<P>

<PRE> Step[ezwf]: 60
</PRE>

<P>

<P>
<HR>
<H2><A NAME="Options">Options

</A></H2>
The ``Options'' Keyword allows you to set some boolean switches:


<P>

<DL>
<DT><STRONG><A NAME="item_growright">growright 

</A></STRONG><DD>
The graph grows to the left by default.


<P>

<DT><STRONG><A NAME="item_bits">bits 

</A></STRONG><DD>
All the numbers printed are in bits instead of bytes ... looks much more
impressive :-)


<P>

<DT><STRONG><A NAME="item_noinfo">noinfo

</A></STRONG><DD>
Supress the information about uptime and device name in the generated
webpage.


<P>

<DT><STRONG><A NAME="item_absolute">absolute

</A></STRONG><DD>
This is for data sources which reset their value when they are read. This
means that rateup has not to build the difference between this and the last
value read from the data source. Useful for external data gatherers.


<P>

<DT><STRONG><A NAME="item_gauge">gauge

</A></STRONG><DD>
Treat the values gathered from target as absolute and not as counters. This
would be useful to monitor things like diskspace, load and so on ....


<P>

<DT><STRONG><A NAME="item_nopercent">nopercent

</A></STRONG><DD>
Don't print usage percentages


<P>

</DL>
Example:


<P>

<PRE> Options[ezwf]: growright, bits
</PRE>

<P>

<P>
<HR>
<H2><A NAME="Colours">Colours

</A></H2>
The ``Colours'' tag allows you to override the default colour scheme. Note:
All 4 of the required colours must be specified here The colour name
('Colourx' below) is the legend name displayed, while the RGB value is the
real colour used for the display, both on the graph and n the html doc.


<P>

Format is: Colour1#RRGGBB,Colour2#RRGGBB,Colour3#RRGGBB,Colour4#RRGGBB


<P>

<DL>
<DT><STRONG><A NAME="item_Colour1">Colour1

</A></STRONG><DD>
Input on default graph


<P>

<DT><STRONG><A NAME="item_Colour2">Colour2

</A></STRONG><DD>
Output on default graph


<P>

<DT><STRONG><A NAME="item_Colour3">Colour3

</A></STRONG><DD>
Max input


<P>

<DT><STRONG><A NAME="item_Colour4">Colour4

</A></STRONG><DD>
Max output


<P>

<DT><STRONG><A NAME="item_RRGGBB">RRGGBB

</A></STRONG><DD>
2 digit hex values for Red, Green and Blue


<P>

</DL>
Example:


<P>

<PRE> Colours[ezwf]: GREEN#00eb0c,BLUE#1000ff,DARK GREEN#006600,VIOLET#ff00ff
</PRE>

<P>

<P>
<HR>
<H2><A NAME="Background">Background

</A></H2>
With the ``Background'' tag you can configure the background colour of the
generated HTML page


<P>

Example:


<P>

<PRE> Background[ezwf]: #a0a0a0a
</PRE>

<P>

<P>
<HR>
<H2><A NAME="YLegend_ShortLegend_Legend_123">YLegend, ShortLegend, Legend[1234]

</A></H2>
The following keywords allow you to override the text displayed for the
various legends of the graph and in the HTML document


<P>

<DL>
<DT><STRONG><A NAME="item_YLegend">YLegend

</A></STRONG><DD>
The Y-Axis of the graph


<P>

<DT><STRONG><A NAME="item_ShortLegend">ShortLegend

</A></STRONG><DD>
The 'b/s' string used for Max, Average and Current


<P>

<DT><STRONG><A NAME="item_Legend">Legend[1234IO]

</A></STRONG><DD>
The strings for the colour legend


<P>

</DL>
Example:


<P>

<PRE>  YLegend[ezwf]: Bits per Second
  ShortLegend[ezwf]: b/s
  Legend1[ezwf]: Incoming Traffic in Bits per Second
  Legend2[ezwf]: Outgoing Traffic in Bits per Second
  Legend3[ezwf]: Maximal 5 Minute Incoming Traffic
  Legend4[ezwf]: Maximal 5 Minute Outgoing Traffic
  LegendI[ezwf]: &amp;nbsp;In:
  LegendO[ezwf]: &amp;nbsp;Out:
</PRE>

<P>

Note, if LegendI or LegendO are set to an empty string with


<P>

<PRE> LegendO[ezwf]:
</PRE>

<P>

The corresponding line below the graph will not be printed at all.


<P>

<P>
<HR>
<H2><A NAME="Timezone">Timezone

</A></H2>
If you live in an international world, you might want to generate the
graphs in different timezones. This is set in the TZ variable. Under
certain operating systems like Solaris, this will provoke the localtime
call to give the time in the selected timezone ...


<P>

Example:


<P>

<PRE> Timezone[ezwf]: Japan
</PRE>

<P>

The Timezone is the standard Solaris timezone, ie Japan, Hongkong, GMT,
GMT+1 etc etc.


<P>

<P>
<HR>
<H2><A NAME="Weekformat">Weekformat

</A></H2>
By default, mrtg (actually rateup) uses the <CODE>strftime(3)</CODE> '%W'
option to format week numbers in the monthly graphs. The exact semantics of
this format option vary between systems. If you find that the week numbers
are wrong, and your system's <CODE>strftime(3)</CODE> routine supports it,
you can try another format option. The POSIX '%V' option seems to
correspond to a widely used week numbering convention. The week format
character should be specified as a single letter; either W, V, or U.


<P>

Example:


<P>

<PRE> Weekformat[ezwf]: V
 
</PRE>

<P>

<P>
<HR>
<H1><A NAME="Two_very_special_Target_names">Two very special Target names

</A></H1>
To save yourself some typing you can define a target called '^'. The text
of every Keyword you define for this target will be PREPENDED to the
corresponding Keyword of all the targets defined below this line. The same
goes for a Target called '$' but its options will be APPENDED.


<P>

The example will make mrtg use a common header and a common contact person
in all the pages generated from targets defined later in this file.


<P>

Example:


<P>

<PRE> PageTop[^]: &lt;H1&gt;NoWhere Unis Traffic Stats&lt;/H1&gt;&lt;HR&gt;
 PageTop[$]: Contact Peter Norton if you have any questions&lt;HR&gt;
</PRE>

<P>

<P>
<HR>
<H1><A NAME="Some_example_mrtg_cfg_files">Some example mrtg.cfg files

</A></H1>
<P>
<HR>
<H2><A NAME="Minimal_mrtg_cfg">Minimal mrtg.cfg

</A></H2>
<PRE> WorkDir: /usr/tardis/pub/www/stats/mrtg
 Target[r1]: 2:public@myrouter.somplace.edu
 MaxBytes[r1]: 64000
 Title[r1]: Traffic Analysis ISDN
 PageTop[r1]: &lt;H1&gt;Stats for our ISDN Line&lt;/H1&gt;
</PRE>

<P>

<P>
<HR>
<H2><A NAME="Minimal_Cfg_for_several_Routers_">Minimal Cfg for several Routers.

</A></H2>
<PRE> WorkDir: /usr/tardis/pub/www/stats/mrtg
 Title[^]: Traffic Analysis for
 PageTop[^]: &lt;H1&gt;Stats for our
 PageTop[$]: Contact The Chief if you notice anybody&lt;HR&gt;
</PRE>

<P>

<PRE> Title[isdn]: our ISDN Line
 PageTop[isdn]: our ISDN Line &lt;/H1&gt;
 Target[isdn]: 2:public@router.somplace.edu
 MaxBytes[isdn]: 64000
 
 Title[backb]: our Campus Backbone
 PageTop[backb]: our Campus Backbone &lt;/H1&gt;
 Target[backb]: 1:public@router.somplace.edu
 MaxBytes[backb]: 1250000
</PRE>

<P>

<PRE> # the following line removes the default prepend value
 # defined above
</PRE>

<P>

<PRE> Title[^]:
 Title[isdn2]: Traffic for the Backup ISDN Line
 PageTop[isdn2]: our ISDN Line &lt;/H1&gt;
 Target[isdn2]: 3:public@router.somplace.edu
 MaxBytes[isdn2]: 64000
</PRE>

<P>

<TABLE BORDER=0 CELLSPACING=0 CELLPADDING=0>
  <TR>
    <TD WIDTH=63><A ALT="MRTG"
    HREF="http://ee-staff.ethz.ch/~oetiker/webtools/mrtg/mrtg.html"><IMG
    BORDER=0 SRC="mrtg-l.gif"></A></TD>
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    HREF="http://ee-staff.ethz.ch/~oetiker/webtools/mrtg/mrtg.html"><IMG
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  2.5.2-1998/2/6</FONT></TD>
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  <A HREF="http://ee-staff.ethz.ch/~oetiker/">Tobias Oetiker</A>
  <A HREF="mailto:oetiker@ee.ethz.ch">&lt;oetiker@ee.ethz.ch&gt;</A> 
  and&nbsp;<A HREF="http://www.bungi.com">Dave&nbsp;Rand</A>&nbsp;<A HREF="mailto:dlr@bungi.com">&lt;dlr@bungi.com&gt;</A></FONT>
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