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

[Will Saxon]

Greg,

Thanks for your response. I suspected as much, but wanted to be sure.

I am creating a separate instance I guess. I have a separate .rrd file for each blade. I have a separate config file with high (>=5000) reference numbers that are aggregates. For example:

Target[switch_5000]: 40:community at switch + \
 41:community at switch + \
 .
 .
 .
 64:community at switch

for a 24 port blade. Is this the 'proper' way to accomplish the task? Is there a better/faster way? I am always interested in creating less load - I am monitoring several thousand ports. 

-Will

> -----Original Message-----
> From: Greg.Volk at edwardjones.com [mailto:Greg.Volk at edwardjones.com]
> Sent: Thursday, August 22, 2002 5:01 PM
> To: mrtg at list.ee.ethz.ch; Will Saxon
> Subject: [mrtg] Re: Aggregate interface monitoring and the MaxBytes
> parameter
> 
> 
> }
> }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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