bandwidth usage in one graph

[shrinivas.bura]

hi all,
i am monitoring my firewall through snmp ,i can get link utilization ,there are two seperate items for incoming (IfInOctate) for outgoing (IfOutOctate).
now i want to see total bandwidth utlization, i.e incoming+outgoing.

Is there a way in zabbix show addition of both these items output on single graph???

[Tenzer]

Yes, you just add both items to the same graph. You can't add the values together of two items, but as long as you just want them shown in a graph that's not a problem.

[vdgraider]

And to create one item with two others items or adding of SNMP OID?? It's possible??