Hi we are working with Open-AudIT and have in excess of 300 class C subnets to scan for devices, what sort of bandwidth is required and how long does this take? We are really only looking for NW devices using ICMP and SNMP at this stage.
For network gear (switches, routers, printers, et al) bandwidth requirements are very minimal. I cannot provide exact measurements (kilobytes) as it depends on the device being discovered. For example a Cisco Nexus device will produce a lot more information than a HP Laserjet Printer. These devices are typically discovered using SNMP, hence multiple SNMP queries per device. Some of these (like listing the network cards) can affect the amount of data transmitted / received.