MRTG-NT-GUIDE(1)               mrtg              MRTG-NT-GUIDE(1)



NAME
       mrtg-nt-guide - The Windows NT Guide to MRTG 2.10.13

SYNOPSIS
       Installing MRTG on an Windows NT or Windows 2000 box is
       not quite as "click and point" as some might want it to
       be. But then again, it is not all that difficult if you
       follow the instructions below.

PREREQUISITS
       To get MRTG to work on Windows NT you need the following:

       o   A copy of Perl for NT from http://www.ActiveState.com
           (it must be version 5.005, or better yet, 5.6).

       o   The latest version of MRTG from http://peo-
           ple.ee.ethz.ch/~oetiker/webtools/mrtg/pub Look for
           mrtg-2.10.13.zip or better. The archive also contains
           a precompiled copy of rateup.exe for Win32.

INSTALLATION
       I suggest you do the following from the machine that will
       be running MRTG, which, in this case, is also a web
       server. All examples are for doing things to a LOCAL
       machine.

       First
           Unzip MRTG to C:\mrtg-2.10.13 on the WindowsNT machine
           of your choice.

       Next
           Install Perl on the same Windows NT machine. You might
           want to make sure that the Perl binary directory is
           listed in your system path.

            C:\Perl\bin;%SystemRoot%\system32;%SystemRoot%;...

           You can manually check this by going to [Control
           Panel]->[System]->[Environment]

       To see if everything is installed properly you can open a
       Command Shell and go into c:\mrtg-2.10.13\bin. Type:

        perl mrtg

       This should give you a friendly error message complaining
       about the missing mrtg configuration file. Now, you have
       successfully installed mrtg and perl.

CONFIGURING MRTG
       Now it is time to create a configuration for mrtg. But
       before we begin you need to know a few things. Take an
       opportunity to gather the following information:

       o   The IP address or hostname and the snmp port number,
           (if non standard), of the device you want to monitor.

       o   If you want to monitor something other than bytes in
           and out, you must also know the SNMPOID of what you
           want to monitor.

       o   Finally you need to know the read-only SNMP community
           string for your device.  If you don't know it, try
           public, that is the default.

       For the rest of this document we will be using device
       10.10.10.1 ( a CISCO Catalyst 5000) with Community string
       public.  We are interested in monitoring traffic, and the
       CPU load. Let's begin.

       The first thing we do in setting up mrtg is making a
       default config file.  Get to a cmd prompt and change to
       the c:\mrtg-2.10.13\bin directory. Type the following com-
       mand:

        perl cfgmaker public@10.10.10.1 --global "WorkDir: c:\www\mrtg" --output mrtg.cfg

       This creates an initial MRTG config file for you. Note
       that in this file all interfaces of your router will be
       stored by number. Unfortunately, these numbers are likely
       to change whenever you reconfigure your router. In order
       to work around this you can get cfgmaker to produce a con-
       figuration which is based on Ip numbers, or even Interface
       Descriptions. Check cfgmaker

       If you get an error message complaining about no such name
       or no response, your community name is probably wrong.

       Now, let's take a look at the mrtg.cfg file that was cre-
       ated.

       In Perl, a "#" is a comment, synonymous with "REM" in DOS.

       Add the following to the top of the mrtg.cfg file:

        WorkDir: D:\InetPub\wwwroot\MRTG

       This is where the web pages are created, usually a web
       root.

        ######################################################################
        # Description: LCP SUWGB
        # Contact: Administrator
        # System Name: LC-Bridge
        # Location: Here
        #.....................................................................

       TargetDevice's IP Address:Interface Number:Community:IP
       Address

        Target[10.10.10.1.1]: 1:public@10.10.10.1

       This is the interface speed (Default is 10 megabits; for
       100Mbit devices use 12500000 and so on...)

        MaxBytes[10.10.10.1.1]: 1250000

        Title[10.10.10.1.1]: LC-Bridge (sample.device): ether0

       This section determines how the web page headers will look








        PageTop[10.10.10.1.1]: <H1>Traffic Analysis for ether0</H1>
         <TABLE>
         <TR><TD>System:</TD><TD>LC-Bridge inAndover</TD></TR>
         <TR><TD>Maintainer:</TD><TD>Administrator</TD></TR>
         <TR><TD>Interface:</TD><TD>ether0(1)</TD></TR>
         <TR><TD>IP:</TD><TD>sample.device(10.10.10.1)</TD></TR>
         <TR><TD>Max Speed:</TD>
         <TD>1250.0 kBytes/s (ethernetCsmacd)</TD></TR>
         </TABLE>

         Target[10.10.10.1.2]: 2:public@10.10.10.1
         MaxBytes[10.10.10.1.2]: 1250000
         Title[10.10.10.1.2]: LC-Bridge (): ulink0
         PageTop[10.10.10.1.2]: <H1>Traffic Analysis for ulink0</H1>
          <TABLE>
          <TR><TD>System:</TD><TD>LC-Bridge inAndover</TD></TR>
          <TR><TD>Maintainer:</TD><TD>Administrator</TD></TR>
          <TR><TD>Interface:</TD><TD>ulink0(2)</TD></TR>
          <TR><TD>IP:</TD><TD>()</TD></TR>
          <TR><TD>Max Speed:</TD>
          <TD>1250.0 kBytes/s (ethernetCsmacd)</TD></TR>
          </TABLE>

         #---------------------------------------------------------------

       And that's a very basic mrtg config file. You can run this
       and see your results by going into the c:\mrtg-2.10.13\bin
       directory and typing:

        perl mrtg mrtg.cfg

       It is normal to get errors for the first two times you run
       this command. The errors will alert you about the fact
       that there have not been any log files in existence
       before.

       If you take a look at those web pages they are not very
       exciting (yet). You need to have the mrtg files run every
       five minutes to produce the desired results.  Just run it
       again after a few minutes. You should now be able to see
       the first lines in your graphs.

MAKE MRTG RUN ALL THE TIME
       Starting mrtg by hand every time you want to run it is not
       going to make you happy I guess.

       There is a special option you can set in the mrtg configu-
       ration file so so that mrtg will not terminate after it
       was started. Instead it will wait for 5 minutes and then
       run again.

       Add the option

        RunAsDaemon: yes

       to your mrtg.cfg file and start it with:

        start /Dc:\mrtg-2.10.13\bin wperl mrtg --logging=eventlog mrtg.cfg

       If you use wperl instead of perl, no console window will
       show. MRTG is now running in the background. If it runs
       into problems it will tell you so over the EventLog. To
       stop MRTG, open the Task Manager and terminate the
       wperl.exe process. If mrtg has anything to tell you these
       messages can be found in the event log.

       If you put a shortcut with

        Target:    wperl mrtg --logging=eventlog mrtg.cfg
        Start in:  c:\mrtg-2.10.13\bin

       into your startup folder, mrtg will now start whever you
       login to your NT box.

       If you do not want to log into your NT box just to start
       mrtg. Have a look at http://www.firedae-
       mon.com/mrtg-howto.html which describes a free tool to
       start any program as a Service. The pages gives specific
       instructions for mrtg users.

EXAMPLE
       Now lets look at a config file to monitor what we wanted
       to on our mythical Cisco Cat 5000 -- utilization on ports
       3, 5, 10, and 24, and the CPU Load, which will show us
       nonstandard mrtg configurations as well as more options..

        WorkDir: D:\InetPub\wwwroot\MRTG

        ######################################################################
        # Description: LCP SUWGB
        # Contact: Administrator
        # System Name: LC-Bridge
        # Location: Here
        #.....................................................................

        Target[10.10.10.1.1]: 3:public@10.10.10.1
        MaxBytes[10.10.10.1.1]: 1250000
        Title[10.10.10.1.1]: LC-Bridge (sample-device): ether0
        PageTop[10.10.10.1.1]: <H1>Traffic Analysis for ether0</H1>
         <TABLE>
        <TR><TD>System:</TD><TD>LC-Bridge inAndover</TD></TR>
        <TR><TD>Maintainer:</TD><TD>Administrator</TD></TR>
        <TR><TD>Interface:</TD><TD>ether0(3)</TD></TR>
        <TR><TD>IP:</TD><TD>sample-device(10.10.10.1)</TD></TR>
        <TR><TD>Max Speed:</TD>
        <TD>1250.0 kBytes/s (ethernetCsmacd)</TD></TR>
        </TABLE>

        #---------------------------------------------------------------

        Target[10.10.10.1.2]: 5:public@10.10.10.1
        MaxBytes[10.10.10.1.2]: 1250000
        Title[10.10.10.1.2]: LC-Bridge (): ulink0
        PageTop[10.10.10.1.2]: <H1>Traffic Analysis for ulink0</H1>
         <TABLE>
         <TR><TD>System:</TD><TD>LC-Bridge inAndover</TD></TR>
         <TR><TD>Maintainer:</TD><TD>Administrator</TD></TR>
         <TR><TD>Interface:</TD><TD>ulink0(5)</TD></TR>
         <TR><TD>IP:</TD><TD>()</TD></TR>
         <TR><TD>Max Speed:</TD>
         <TD>1250.0 kBytes/s (ethernetCsmacd)</TD></TR>
         </TABLE>

        #---------------------------------------------------------------








        Target[10.10.10.1.1]: 10:public@10.10.10.1
        MaxBytes[10.10.10.1.1]: 1250000
        Title[10.10.10.1.1]: LC-Bridge (sample-device): ether0
        PageTop[10.10.10.1.1]: <H1>Traffic Analysis for ether0</H1>
         <TABLE>
         <TR><TD>System:</TD><TD>LC-Bridge inAndover</TD></TR>
         <TR><TD>Maintainer:</TD><TD>Administrator</TD></TR>
         <TR><TD>Interface:</TD><TD>ether0(10)</TD></TR>
         <TR><TD>IP:</TD><TD>sample-device(10.10.10.1)</TD></TR>
         <TR><TD>Max Speed:</TD>
         <TD>1250.0 kBytes/s (ethernetCsmacd)</TD></TR>
         </TABLE>

        #---------------------------------------------------------------

        Target[10.10.10.1.2]: 24:public@10.10.10.1
        MaxBytes[10.10.10.1.2]: 1250000
        Title[10.10.10.1.2]: LC-Bridge (): ulink0
        PageTop[10.10.10.1.2]: <H1>Traffic Analysis for ulink0</H1>
         <TABLE>
         <TR><TD>System:</TD><TD>LC-Bridge inAndover</TD></TR>
         <TR><TD>Maintainer:</TD><TD>Administrator</TD></TR>
         <TR><TD>Interface:</TD><TD>ulink0(24)</TD></TR>
         <TR><TD>IP:</TD><TD>()</TD></TR>
         <TR><TD>Max Speed:</TD>
         <TD>1250.0 kBytes/s (ethernetCsmacd)</TD></TR>
         </TABLE>

        #---------------------------------------------------------------

        # Router CPU load %
        Target[cpu.1]:1.3.6.1.4.1.9.2.1.58.0&1.3.6.1.4.1.9.2.1.58.0:public@10.10.10.1
        RouterUptime[cpu.1]: public@10.10.10.1
        MaxBytes[cpu.1]: 100
        Title[cpu.1]: CPU LOAD
        PageTop[cpu.1]: <H1>CPU Load %</H1>
        Unscaled[cpu.1]: ymwd
        ShortLegend[cpu.1]: %
        XSize[cpu.1]: 380
        YSize[cpu.1]: 100
        YLegend[cpu.1]: CPU Utilization
        Legend1[cpu.1]: CPU Utilization in % (Load)
        Legend2[cpu.1]: CPU Utilization in % (Load)
        Legend3[cpu.1]:
        Legend4[cpu.1]:
        LegendI[cpu.1]:
        LegendO[cpu.1]: &nbsp;Usage
        Options[cpu.1]: gauge

       This is a nice example of how to monitor any SNMP device
       if you know what OID you want to use. Once again, For an
       explanation of the more advance features of mrtg, please
       see Tobias's documentation.

AUTHORS
       David S. Divins <ddivins@moon.jic.com>, Steve Pierce
       <MRTG@HDL.com>, Tobi Oeitker <oetiker@ee.ethz.ch>



2.10.13                     2004-01-19           MRTG-NT-GUIDE(1)
