FreeBSD

vladimir-dk · 09-11-2004, 05:50 PM

I have just installed MRTG on my FreeBSD server and it is now creating statistics on my networkcard.

In my "mrtg.cfg" can i see that you can monitor other interfaces. And now the question. I have a router - can i monitor the traffic on this router using MRTG ?

If yes - how do i configure this ?

Thanks for your time.

jschiwal · 09-11-2004, 11:54 PM

Example from the www.mrkg.com website:

Code:

cfgmaker --global 'WorkDir: /home/httpd/mrtg'  \
          --global 'Options[_]: bits,growright' \
          --output /home/mrtg/cfg/mrtg.cfg    \
           community@router.abc.xyz

From cfgmaker man page at http://people.ee.ethz.ch/~oetiker/we.../cfgmaker.html

Quote:

DESCRIPTION
Cfgmaker creates MRTG configuration files based on information pulled from a router or another SNMP manageable device.
[community@]router

Community is the community name of the device you want to create a configuration for. If not specified, it defaults to 'public'; you might want to try this first if you do not know the community name of a device. If you are using the wrong community name you will get no response from the device.

Router is the DNS name or the IP number of an SNMP-managable device. Following the name you can specify 6 further options separated by colons. The full syntax looks like this:

router[:[prt][:[tmout][:[retr][:[backoff][:vers]]]]]

Of special interest may be the last parameter, vers. If you set this to '2' then your device will be queried with SNMP version 2 requests. This allows to poll the 64 bit traffic counters in the device and will thus work much better with fast interfaces (no more counter overrun). Note that the order in which the routers are specified on the command line do matter as the same order is used when the configuration file is generated. The first specified router has it's configuration lines genrated first, followed by the lines belonging to the next router and so on.

Note that the first line of the generated cfg file will contain all the commandline options you used for generating it. This is to allow for the easy 'regeneration' in case you want to add newhosts or make some other global change.

vladimir-dk · 09-12-2004, 04:20 AM

Thx for the reply m8!

But when i run the commands. It just override the "mrtg.cfg" i clear it comepletly.

I can see that the mrtg.cfg (after I have recreated the file) have the possibility to analyse more interfaces.

### Interface 1 >> Descr: 'sis0' | Name: '' | Ip: '10.0.0.3' | Eth: '' ###

Target[127.0.0.1_1]: 1

ublic@127.0.0.1:
SetEnv[127.0.0.1_1]: MRTG_INT_IP="10.0.0.3" MRTG_INT_DESCR="sis0"
MaxBytes[127.0.0.1_1]: 1250000
Title[127.0.0.1_1]: Traffic Analysis for 1 -- dfbserver.zoq.dk
PageTop[127.0.0.1_1]: <H1>Traffic Analysis for 1 -- dfbserver.zoq.dk</H1>
<TABLE>
<TR><TD>System:</TD> <TD>dfbserver.zoq.dk in DK</TD></TR>
<TR><TD>Maintainer:</TD> <TD>webmaster@zoq.dk</TD></TR>
<TR><TD>Description:</TD><TD>sis0 </TD></TR>
<TR><TD>ifType:</TD> <TD>ethernetCsmacd (6)</TD></TR>
<TR><TD>ifName:</TD> <TD></TD></TR>
<TR><TD>Max Speed:</TD> <TD>1250.0 kBytes/s</TD></TR>
<TR><TD>Ip:</TD> <TD>10.0.0.3 (dfbserver.zoq.dk)</TD></TR>
</TABLE>

### Interface 2 >> Descr: 'lp0' | Name: '' | Ip: '' | Eth: '' ###
### The following interface is commented out because:
### * it is administratively DOWN
### * it is operationally DOWN
### * has a speed of 0 which makes no sense
#
# Target[127.0.0.1_2]: 2

ublic@127.0.0.1:
# SetEnv[127.0.0.1_2]: MRTG_INT_IP="" MRTG_INT_DESCR="lp0"
# MaxBytes[127.0.0.1_2]: 0
# Title[127.0.0.1_2]: Traffic Analysis for 2 -- dfbserver.zoq.dk
# PageTop[127.0.0.1_2]: <H1>Traffic Analysis for 2 -- dfbserver.zoq.dk</H1>
# <TABLE>
# <TR><TD>System:</TD> <TD>dfbserver.zoq.dk in DK</TD></TR>
# <TR><TD>Maintainer:</TD> <TD>webmaster@zoq.dk</TD></TR>
# <TR><TD>Description:</TD><TD>lp0 </TD></TR>
# <TR><TD>ifType:</TD> <TD>para (34)</TD></TR>
# <TR><TD>ifName:</TD> <TD></TD></TR>
# <TR><TD>Max Speed:</TD> <TD>0.0 Bytes/s</TD></TR>
</TABLE>

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but I cant get it to work without override the original mrtg-config file.