ping6 requires the network interface to ping a link local address

[jeffsilverm]

The IPv6 default gateway is a link-local address, such as fe80::c256:27ff:feca:724. In order to ping it, you must specify the interface. By way of contrast, with IPv4, you may specify the interface (but if you do, then you have to get it right).

Modify the ping method in network.py to add the interface, using the -I switch, to the ping command.

[jeffsilverm]

In network.py, where I have if ent['destination'] == address:, that's crude. There should be something in module socket which has membership.