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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'>This is not possible as you state it;
Target line calculations can only be done on an OID pair. However you
might achieve it like this:<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'>Target[targetname]: oid1&oid3:comm.@host
– ( oid2&oid4:comm@host * 5 + ( pseudoZero&oid4:comm.@host * 5 )
) <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'>Note that the spaces around the brackets
and arithmetic signs are essential. ‘pseudoZero’ is a magic MRTG
virtualOID that always resolves to zero.<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'>Check the documentation on complex
calculated Target lines online at <a href="http://www.mrtg.org/">www.mrtg.org</a>
or get a copy of the book from <a href="http://www.steveshipway.org/book">www.steveshipway.org/book</a>
<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'>Your example below is using oid4x10 in one
place but oid4x8 in another but I guess that’s just a typo.<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><b><font size=2 face=Tahoma><span lang=EN-US
style='font-size:10.0pt;font-family:Tahoma;font-weight:bold'>From:</span></font></b><font
size=2 face=Tahoma><span lang=EN-US style='font-size:10.0pt;font-family:Tahoma'>
nisha (via Nabble) [mailto:ml-user+230579-585948030@n2.nabble.com] <br>
<b><span style='font-weight:bold'>Sent:</span></b> Thursday, 27 August 2009
11:02 p.m.<br>
<b><span style='font-weight:bold'>To:</span></b> <st1:PersonName w:st="on">Steve
Shipway</st1:PersonName><br>
<b><span style='font-weight:bold'>Subject:</span></b> [mrtg-developers]
Mathematical operations on OIDs</span></font><span lang=EN-US><o:p></o:p></span></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>
<div>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'>Hi all, <br>
<br>
I want to perform mathematical operations on OIDs in the target line. For
example, there are 4 oids as shown below: <br>
traffic packet <br>
In oid1 oid2 <br>
Out oid3 oid4 <br>
<br>
<br>
Now i want to apply the following formula <br>
traffic in = oid1 - (oid2 * 5) <br>
traffic out = oid3 - (oid4 * 10) <br>
<br>
My target line in router cfg file is like this: <br>
Target[targetname]: oid1&oid3:comm@hostname - (oid2 * 5)&(oid4 *
8):comm@hostname <br>
<br>
Is this possible in MRTG? Can the router cfg file handle oids with mathematical
operations? <br>
<br>
</span></font><font size=1 color="#666666" face=Tahoma><span style='font-size:
8.5pt;font-family:Tahoma;color:#666666'><o:p></o:p></span></font></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>
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