IPv6 subnet mask sizes
There are potentially billions of devices to be pinged within a single IPv6 subnet. To ensure that discovery completes, you must specify a sufficiently large netmask if you specify an IPv6 subnet as a ping seed.
The following table provides examples of IPv6 subnet mask
sizes configured within ping seeds and the corresponding estimated
time required to ping the devices in the subnet. The estimated times
are based on spacing the pings by 100 ms between pings. This table
shows that it is best to limit the size of IPv6 subnet masks in your
subnet seeds.
| IPv6 subnet mask size | Number of IPv6 addresses in subnet | Estimated ping time for subnet |
|---|---|---|
| 120 | 256 | 26 seconds |
| 112 | 65536 | 1 hour 48 minutes |
| 100 | 268 million | Approximately 8.5 years |
The time estimates shown in the table refer to time taken to ping all the seeds in a subnet seed specified for the Ping finder. It would take longer to complete the discovery as there will be many more devices to ping within the discovery scope.