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<p class=MsoNormal><font size=2 color=navy face=Arial><span lang=PT-BR
style='font-size:10.0pt;font-family:Arial;color:navy'>Hi Scott,<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span lang=PT-BR
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'>Here are my thoughts for your questions:<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'>1- You should try to collect SNMP
information as close as possible to your network core, to avoid network traffic
and extra WAN bandwidth utilization. That means: I’d go for a monitoring
on your core router (assuming they both have enough memory and CPU resources). The
graph you get should be the same on both sides of the link you’re collecting
info, the differences is that input-A should be equal to output-B and output-A
should be equal to input-B.<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'>2- No, you don’t monitor interfaces
status. Maybe even you can do this with a true/false statement (as long as we
have OID for interface status), but you’d take at least 5 mins to
discover it, and that’s an eternity when it comes to network
availability. Believe me, you don’t want to discover the link is down by
the complaint of users… Maybe, for this, you’d like to meet Nagios.
</span></font><font size=2 color=navy face=Wingdings><span style='font-size:
10.0pt;font-family:Wingdings;color:navy'>J</span></font><font size=2
color=navy face=Arial><span style='font-size:10.0pt;font-family:Arial;
color:navy'> it’s kind of nice and freeware.<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'>Best regards,<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 lang=PT-BR
style='font-size:10.0pt;font-family:Arial;color:navy'>Rafael Bivar<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span lang=PT-BR
style='font-size:10.0pt;font-family:Arial;color:navy'>Rio de Janeiro - Brazil<o:p></o:p></span></font></p>
<div>
<p class=MsoNormal><font size=3 face="Times New Roman"><span lang=PT-BR
style='font-size:12.0pt'><o:p> </o:p></span></font></p>
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face="Times New Roman"><span style='font-size:12.0pt'>
<hr size=2 width="100%" align=center tabindex=-1>
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<p class=MsoNormal><b><font size=2 face=Tahoma><span lang=PT-BR
style='font-size:10.0pt;font-family:Tahoma;font-weight:bold'>From:</span></font></b><font
size=2 face=Tahoma><span lang=PT-BR style='font-size:10.0pt;font-family:Tahoma'>
mrtg-bounces@lists.oetiker.ch [mailto:mrtg-bounces@lists.oetiker.ch] <b><span
style='font-weight:bold'>On Behalf Of </span></b>Scott Danton<br>
<b><span style='font-weight:bold'>Sent:</span></b> quarta-feira, 16 </span></font><font
size=2 face=Tahoma><span style='font-size:10.0pt;font-family:Tahoma'>de maio de
2007 12:45<br>
<b><span style='font-weight:bold'>To:</span></b> mrtg@lists.oetiker.ch<br>
<b><span style='font-weight:bold'>Subject:</span></b> [mrtg] General monitoring
question</span></font><o:p></o:p></p>
</div>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'>I am trying to get a bit of general information about
traffic monitoring. Here is my setup. I have a core router that has
6 t-1 connections to my remote sites. Where will I get the most accurate
monitoring from the core looking at all interfaces or the remote side
router? <o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span 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 style='font-size:10.0pt;
font-family:Arial'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'>Thanks,<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'>Scott<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'><o:p> </o:p></span></font></p>
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