[rrd-users] Re: Monthly bandwidth usage.

[Dio Brando]

Ok, I use two VDEF to calculate IN and OUT bandwidth usage, but when I
try to add them, to calculate total bw usage whit a CDEF, rrd-graph get
me an error (rpn expressions without DEF or CDEF variables are not
supported). Why?

Regards,
Dio.

Dio Brando ha scritto:
> Hello all,
> 	
> 	is it possible to calculate a monthly bandwidth usage from a rrd db and
> put the result on a graph with rrdtool directly (like this
> http://mrtg.daemonology.net/?log=http&png=daily)? If yes, how?
> 
> I use MRTG to fetch data from snmp agent. Thanks.
> 
> Regards,
> Dio.
> 
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