I am trying to use this tool to detect duplicate IPv6 address in the network but in case when the address is unique in the network the tool fails with the error below.


When setting the '-a' option as 'unspecified' I expected that source value in IPv6 packet would be '::' but it is not.

OS:
NAME="Rocky Linux"
VERSION="8.7 (Green Obsidian)"
NDP:
VERSION=v1.0.0