Configure IP address discovery through TTL values
Sensors that are configured for L2 discovery and that have limited means for sharing device IP addresses (such as traffic without ARP, DHCP, or local multicast/broadcast addresses) can discover IP addresses through TTL values.
By adding a field to the Running Config file, you can enable the ExtraHop system to
learn IP addresses for devices through packets with well-known time-to-live (TTL)
values. These values indicate that the packet was not routed, which means that the
ExtraHop system can reasonably identify an IP address assigned to an L2 device. We only
recommend enabling this setting when other IP address discovery methods are
unavailable.
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