Interface graph : 32 or 64 bits ?

[French_Poul]

Hello,

I would like to know why the graphs are different using 32 bits or 64 bits (with low values too)?

See my graphs ; the first is using 32 bits (default), and the second represents the same interface on the same switch but using 64 bits : there are different... I have read a topic that explained that it can have some problem when values are above 114Mbits/s ; but here the values are low...

Why this difference, and which of this graphs is correct...? I use Cacti version 0.8.7b.

Thanks in advance for your help!

[gandalf]

Please post "rrdtool graph" statements for both images. Click the wrench next to the image to see what I mean
R.

[French_Poul]

Here the RRDTool code for the 32 bits graph :

Code: Select all

/usr/bin/rrdtool graph - \
--imgformat=PNG \
--start=1271897209 \
--end=1271920318 \
--title="SW**** - Percent Bandwidth In Out - Gi0/1" \
--base=1000 \
--height=120 \
--width=500 \
--alt-autoscale-max \
--lower-limit=0 \
COMMENT:"From 2010/04/22 02\:46\:49 To 2010/04/22 09\:11\:58\c" \
COMMENT:"  \n" \
--vertical-label="Bits per second" \
--slope-mode \
--font TITLE:10: \
--font AXIS:8: \
--font LEGEND:8: \
--font UNIT:8: \
DEF:a="/usr/share/cacti/site/rra/sw****_traffic_in_27.rrd":traffic_in:AVERAGE \
DEF:b="/usr/share/cacti/site/rra/sw****_traffic_in_27.rrd":traffic_in:MAX \
CDEF:cdefa=a,8,* \
CDEF:cdefb=a,8,* \
CDEF:cdefbb=a,1000000000,/,800,* \
CDEF:cdefbh=b,1000000000,/,800,* \
CDEF:cdefca=a,a,-,1000000000,+,0.9,* \
AREA:cdefa#FFD660FF:"In Octets"  \
GPRINT:cdefb:LAST:" Current \:%8.2lf%s"  \
GPRINT:cdefb:AVERAGE:"Average \:%8.2lf%s"  \
GPRINT:cdefb:MAX:"Maximum \:%8.2lf%s\n"  \
LINE1:cdefa#EA8F00FF:"Out octets"  \
GPRINT:cdefa:LAST:"Current \:%8.2lf%s"  \
GPRINT:cdefa:AVERAGE:"Average \:%8.2lf%s"  \
GPRINT:b:MAX:"Maximum \:%8.2lf%s\n"  \
COMMENT:"\n"  \
COMMENT:"*******************************  Total Bandwidth Utilization  *******************************\n"  \
COMMENT:"Current \:"  \
GPRINT:cdefbb:LAST:"in \:%7.4lf%%"  \
GPRINT:cdefbb:LAST:";  out \:%7.4lf%%\n"  \
COMMENT:"Average \:"  \
GPRINT:cdefbb:AVERAGE:"in \:%7.4lf%%"  \
GPRINT:cdefbb:AVERAGE:";  out \:%7.4lf%%\n"  \
COMMENT:"Maximum \:"  \
GPRINT:cdefbh:MAX:"in \:%7.4lf%%"  \
GPRINT:cdefbh:MAX:";  out \:%7.4lf%%\n"  \
 \
GPRINT:cdefca:AVERAGE:"Bandwidth limit before alert in bps (90 percent) \:%8.2lf%s\n"  \
COMMENT:"\n"  \
COMMENT:"Speed \: 1000000000 bps\n" 

And here the RRDTool code for the 64 bits graph :

Code: Select all

/usr/bin/rrdtool graph - \
--imgformat=PNG \
--start=1271874546 \
--end=1271920266 \
--title="SW**** - Percent Bandwidth In Out - Gi0/1" \
--base=1000 \
--height=120 \
--width=500 \
--alt-autoscale-max \
--lower-limit=0 \
COMMENT:"From 2010/04/21 20\:29\:06 To 2010/04/22 09\:11\:06\c" \
COMMENT:"  \n" \
--vertical-label="Bits per second" \
--slope-mode \
--font TITLE:10: \
--font AXIS:8: \
--font LEGEND:8: \
--font UNIT:8: \
DEF:a="/usr/share/cacti/site/rra/sw****_traffic_in_27.rrd":traffic_in:AVERAGE \
DEF:b="/usr/share/cacti/site/rra/sw****_traffic_in_27.rrd":traffic_out:AVERAGE \
DEF:c="/usr/share/cacti/site/rra/sw****_traffic_in_27.rrd":traffic_out:MAX \
DEF:d="/usr/share/cacti/site/rra/sw****_traffic_in_27.rrd":traffic_in:MAX \
CDEF:cdefa=a,8,* \
CDEF:cdefb=a,8,* \
CDEF:cdefe=b,8,* \
CDEF:cdefbb=a,1000000000,/,800,* \
CDEF:cdefbc=b,1000000000,/,800,* \
CDEF:cdefbh=d,1000000000,/,800,* \
CDEF:cdefbi=c,1000000000,/,800,* \
CDEF:cdefca=a,a,-,1000000000,+,0.9,* \
AREA:cdefa#FFD660FF:"In Octets"  \
GPRINT:cdefb:LAST:" Current \:%8.2lf%s"  \
GPRINT:cdefb:AVERAGE:"Average \:%8.2lf%s"  \
GPRINT:cdefb:MAX:"Maximum \:%8.2lf%s\n"  \
LINE1:cdefe#EA8F00FF:"Out octets"  \
GPRINT:cdefe:LAST:"Current \:%8.2lf%s"  \
GPRINT:cdefe:AVERAGE:"Average \:%8.2lf%s"  \
GPRINT:c:MAX:"Maximum \:%8.2lf%s\n"  \
COMMENT:"\n"  \
COMMENT:"*******************************  Total Bandwidth Utilization  *******************************\n"  \
COMMENT:"Current \:"  \
GPRINT:cdefbb:LAST:"in \:%7.4lf%%"  \
GPRINT:cdefbc:LAST:";  out \:%7.4lf%%\n"  \
COMMENT:"Average \:"  \
GPRINT:cdefbb:AVERAGE:"in \:%7.4lf%%"  \
GPRINT:cdefbc:AVERAGE:";  out \:%7.4lf%%\n"  \
COMMENT:"Maximum \:"  \
GPRINT:cdefbh:MAX:"in \:%7.4lf%%"  \
GPRINT:cdefbi:MAX:";  out \:%7.4lf%%\n"  \
 \
GPRINT:cdefca:AVERAGE:"Bandwidth limit before alert in bps (90 percent) \:%8.2lf%s\n"  \
COMMENT:"\n"  \
COMMENT:"Speed \: 1000000000 bps\n" 

[gandalf]

The first one simply lacks two data sources (DEF statements).
Either change the graph template (if it is a templated graph) or the graph itself
R.

[French_Poul]

Oh, I see... That is graphed (in the 32 bits) , the in and the out are really just the in...

I will see now...! It's ok!!

Thanks a lot Gandalf!!

[123ralle]

Hello,

would you like to share your template for the graph?
I'am highly interested in it.

regards,
Ralf

[French_Poul]

Of course!

There was some changes since the last time...

The bandwidth limit before alert is a red line on the graph, but we can see her, only when the in or out bandwidth is nearly of the bandwidth limit.

I don't know if the template can be imported correctly because it's the first time I do an export...