Sum two snmp for each hosts

[michelem]

First of all I suck with CDEF
My problem is:
I have 6 device and for each device I have two snmp (IN/OUT), I need to make a graph with this 6 devices (lines) which draw the sum of each IN+OUT snmps (and not the total IN/OUT of 6 devices).
Do I need to create a data source template within the two data source items and then...?
How can I sum each IN/OUT device?
Need help.
Thank you

[gandalf]

Do you need
- 1 graph for 6 devices with IN/OUT each or
- 6 graphs for 1 device with IN/OUT each?
Solution for both approaches exist
Reinhard

[michelem]

I need 1 graph with 6 lines/devices each with sum of IN/OUT snmp counter, and my problem is how to get the sum IN/OUT of each device

[BelgianViking]

Suppose for host 1, your IN and OUT data sources are the first 2 of the graph template, than make a CDEF "a,b,+", which you graph as a line. For a second host, next 2 data sources, define a CDEF 'c,d,+", and so on.

[michelem]

I solved it Thank you, if I have time I'll post the results