Enter valid Network Ranges separated by commas.You may use an IP address, a Network range such as 192.168.1.0/24 or 192.168.1.0/255.255.255.0, or using wildcards such as 192.168.*.*
If Cacti can not determine the interface speed due to either ifSpeed or ifHighSpeed not being set or being zero, what maximum value do you wish on the resulting RRDfiles.