how can i get packet from a device like a Switch because .. wen i see poling from switch i see packet but i can’t generate graph .. i need some help here 
Does your switch have an SNMP agent? Did you try an SNMP Walk on the device?
yes he have .. is a cisco 2960 i can gat traffic 4 ports but i can’t make graph 4 packets 
Did you load the 2950 MIB into Dude? When you perform an SNMP walk, do you see the packet count OIDs that you will need to poll?