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<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'>MRTG is really a monitoring-logging
program. In other words, it will graph a metric over time. Although you can
put thresholds in there and trigger execution, this is a bolt-on and not ideal.
Some frontends (eg routers2) will display a grey bar on the graph when an
interface or device is down (data unavailable rather than zero) but this does
not trigger a proactive alert.<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'>What it sounds like you need is a
monitoring-alerting program. IE, check if something is OK/Warning/Critical and
send out some sort of alert if it is not OK. For this, we use Nagios (free!)
but other things like Tivoli exist to do the same for lots of money.<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'>If you use Nagios, it is nice because both
Nagios and MRTG can query hosts via the same agents, and you can register a URL
against a Nagios host to provide you embedded links to the appropriate graphs.
Also, if you use the routers2 frontend, this has a Nagios plugin to embed
Nagios status pages into the MRTG frames.<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'>HTH<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'>Steve<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'><o:p> </o:p></span></font></p>
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<p class=MsoNormal><font size=2 face=Arial><span lang=EN-US style='font-size:
10.0pt;font-family:Arial'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span lang=EN-US style='font-size:
10.0pt;font-family:Arial'>Second I was testing one of my sites that is
connected, but no one is on it yet, and I send a large number of pings. I
then disconnected the T-1 and the only thing that I noticed monitoring the core
router was the traffic dropped. I could not tell the interface was
down. Is there a way to tell if the interface is up or down with
this program?<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span lang=EN-US style='font-size:
10.0pt;font-family:Arial'><o:p> </o:p></span></font></p>
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