[mrtg] Re: Aggregate interface monitoring and the MaxBytes parameter

[Greg.Volk at edwardjones.com]

}
}I want to write some config files that generate an accurate 
}aggregation of bandwidth per blade in our catalyst switches. I 
}had initially set the MaxBytes parameter to 1250000, since the 
}ports in question are all 10mbit ports. I was not encouraged 
}by the results - each graph was showing less traffic per blade 
}than was realistic.
}

How are you summing up all the port traffic? Is there an instance
number for the whole blade? Or are you getting the in/out octets
for each interface, adding them all together and plotting the
delta from poll to poll?

}
}Do I have my MaxBytes set too low? Should it be, say, 30000000 
}(1250000*24) for a 24 port blade?
}

If maxbytes is set to 1250000 then mrtg will throw anything above
that away, so yes you should set it above that. 1250000*24 is probably
a good start.



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