[mrtg] Re: Monitoring Transit Traffic

David Sawyer david.sawyer at uk.mckhboc.com
Thu Aug 30 17:47:59 MEST 2001


> I'd like to monitor the total in/out traffic to my transit service
> provider.  Because
> we have multiple links to them, I have an external program which captures
> the inbitsec &
> outbitssec of all our links to them and sums them up.
> 
> We have the capability of reaching 4.976 Gbps, so my MaxBytes[] value is
> set to 4976000000.  I
> modified the mrtg source code to not crash when accepting values less than
> 2^32-1.
> 
MaxBytes = bits / 8
4,976,000,000 / 8 = MaxBytes (622,000,000)

> My external program produces the following output...
> 
> 1497274000  <total inbitssec>
> 224999000    <total outbitsec>
> 1
> Transit Customer
> 
> My mrtg logfile looks like the following......it captures the outbitsec;
> however replaces the inbitsec with 0's.
> 
> 999183985 1499495000 224629000
> 999183985 0 224629000 0 224629000
> 999183603 0 221818000 0 221818000
> 999183600 0 221818000 0 221818000
> 999183300 0 221820350 0 222053000
> 999183000 0 221887700 0 222053000
> 999182700 0 220977000 0 220977000
> 999182400 0 220977000 0 220977000
> 999182100 0 196148363 0 220977000
> 999181800 0 0 0 0
> 999181500 0 0 0 0
> 
The value of 1,499,495,000 is higher than MaxBytes (4,976,000,000),
therefore it's ignored.
Are you sure that all the links add up to 4.976Gb


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