To post on the summary, currently Discovery is unable to scan across multiple subnets within one scheduled LAN Watch. It is not recommended to run a LAN Watch across multiple subnets. Instead, we recommend to run one LAN Watch per subnet to find the devices correctly and deploy agents to them. It's the expected behavior of the Quick scan (ICMP echo request) to pick up machines; however, the Deep Scan (ARP request) does not and thus we prevent the device(s) from being shown due to a lack of complete information from the device(s).
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