Can you point me at some details of how you are adding these? I don't mind spending a little while trying to reproduce this...
Yes, sure! Be patient and use your imagination, my english is not as good as yours hehe
Cacti and Munin are running on the same box. I've got around 70 firewalls which don't run snmp so they are being monitored by Munin. That's why I can't poll them from cacti.
Munin's RRD files are on the same box, so it's not big deal to access them.
Then I'm basically following this procedure: [HOWTO] Use externally updated rrd files + BONUS TRACK
All these firewall are already on Cacti just with an advance ping attached to them to be able to use them on wheathermaps as reference.
I created 2 Data Template, one for inbound traffic and one for outbound traffic. That is because munin split the traffic in two different files and the DS name is called the same (42). See attached picture "Data Templates.png". I'm not sure but if the DS name is the same they couldn't be under the same Data template, that's why I made 2.
Then I created Graph Template, see attached cacti_graph_template_munin_interface_traffic.xml
Then I grabbed a firewall, and manually created 2 data sources for 1 interface traffic (remember Munin uses 2 different rrd files). See attached "Host Data Sources.png"
And finally you can create the graph for it with those two data sources. See attached "Host Interface Graph".
Does that make sense to you?
I've been playing with weathermap adding a few by hand, specifying 2 DS targets but I was looking forward to do it this way Add DS and Graphs from CLI (0.8.8h)
Because that way I could do the job once and get the benefits on weathermap as well. If somehow i find out how to add all of these graphs to cacti but I can't pick them from weathermap is worthless.
Don't hesitate to ask any more details.